Box is recommended for enterprise compliance and granular access controls, running nearly neck and neck with Microsoft OneDrive. For sending large, sensitive files to external clients, Tresorit is the usual answer.
Since July, Boxrising has become a more common answer for project tool storage integrations, while FileCloudfalling dropped out of recommendations for team cloud storage.
Latest insights
Week of Sep 21–27 · Since Jul 5
Google Drive Slipping: Google Drive now trails Dropbox in Secure Cloud Storage and File Sharing, #4 to #3
Dropbox Gap between platforms: Dropbox's platform gap in Secure Cloud Storage and File Sharing narrowed: ChatGPT Search 37.5%, Google AI Mode 23.1%
Dropbox Gaining: Dropbox moved ahead of Google Drive in Secure Cloud Storage and File Sharing
Tresorit Gap between platforms: Google AI Mode now mentions Tresorit 15.2 points more often than ChatGPT Search in Secure Cloud Storage and File Sharing, a narrowed gap
Egnyte Gaining: Egnyte now ranks #10 in Secure Cloud Storage and File Sharing, up from #22
38% of citations point at the ranked brands’ own sites. reddit.com, youtube.com, techradar.com are the most-cited sites outside the ranked brands’ own domains.
The standard tool used for allowing outside counsel, auditors, or third parties to review confidential documents securely without exposing an internal network is a Virtual Data Room (VDR) (often referred to in legal contexts as a legal data room).[](https://www.intralinks.com/guides/legal-data-rooms)
Alternative collaboration platforms can also achieve this if configured correctly, but VDRs are purpose-built for high-security external reviews. Key options and features include:[](https://www.intralinks.com/guides/legal-data-rooms)
Virtual Data Rooms (VDRs) : Platforms like Intralinks VDRPro , Datasite, or provide isolated, cloud-based repositories. They allow you to grant granular, document-level permissions (such as view-only, disable printing, or block downloading) and apply dynamic watermarks without provisioning network credentials.[]()
We need a way for external legal counsel to review and approve documents without letting them into our internal network. What software handles this securely?
We need a way for external legal counsel to review and approve files without granting them access to our internal network. What software handles this securely?
Secure Enterprise File Sharing (EFSS) : Solutions like Box or Microsoft SharePoint (when configured with external sharing governance and Azure Information Protection) allow controlled, password-protected, and expiring links for external collaborators.
Legal Collaboration Workspaces : Platforms like Thomson Reuters HighQ or NetDocuments provide secure extranet workspaces tailored for law firm collaboration, keeping outside counsel inside a walled garden rather than your core corporate network.[](https://legal.thomsonreuters.com/en/products/cocounsel-legal)
If you'd like to narrow this down, let me know:
What type of documents are you sharing (M&A due diligence, active litigation discovery, or regulatory audits)?
Do you need features like dynamic watermarking or disabled downloading/printing?
The tool you’re looking for is a secure virtual data room (VDR) or a secure external document review portal. It allows outside counsel to review confidential documents without granting them full access to your internal network.
Best options to consider
1. Microsoft SharePoint
(Best if you use Microsoft 365)
Create a dedicated site for outside counsel, with access restricted to approved documents and authenticated guest accounts. Administrators can audit sharing and revoke access.
Best for ongoing collaboration and routine legal document review.
A legal-focused document management platform with controlled access to matter-specific files. Worth evaluating if your organization manages large volumes of privileged legal documents.
Best for law firms and corporate legal departments with established legal workflows.
Whatever tool you choose, configure it to provide:
Least-privilege access: Counsel sees only the documents and matters assigned to them.
Strong authentication: MFA or verified guest sign-in.
Read-only permissions: Prevent editing or deletion when not required.
Download and printing restrictions: Where supported, recognizing that screenshots or photography may still be possible.
Audit logs: Track document access, downloads, and sharing.
Expiration and revocation: Automatically end access or revoke it when the engagement concludes.
Network isolation: No VPN, internal network account, or broad access to internal systems.
For Microsoft 365, a separate SharePoint site with authenticated, named-user access is a practical starting point. Microsoft supports site-level restrictions and individual document permissions.
One question to narrow this down: Is your organization already using Microsoft 365, or are you looking for a standalone solution specifically for outside counsel to review privileged documents?
To securely share, review, and approve documents with external legal counsel without granting them access to your internal network, you need solutions featuring isolated multi-tenant architecture, granular access controls, dynamic watermarking, and robust audit trails.
The primary software categories and industry-standard platforms built for this exact requirement include:
Virtual Data Rooms (VDRs) : VDRs are purpose-built for secure, external-facing document review, due diligence, and litigation . They isolate files entirely from your internal infrastructure while allowing fine-tuned permissioning (e.g., block downloading, printing, or copying).
Firmex Data Rooms : Widely deployed for litigation and compliance; highly praised for its straightforward permissioning and reliable tracking.
Cloud Document Management Systems (DMS) with Secure Extranets : These platforms use secure cloud-based repositories that let you spin up digital workspaces specifically partitioned for outside counsel.
NetDocuments : An industry standard for legal that allows secure sharing via external digital workspaces while keeping permissions strictly managed and centralized in the cloud.
iManage : Offers secure external collaboration capabilities and governance controls so external parties can review and contribute without network exposure.[](https://www.netdocuments.com/who-we-serve/law-firms/)
Legal Operations & Matter Management Portals : If you need workflow approvals, task assignment, and document sign-offs bundled together with outside counsel management.
Lexzur : Features specialized external legal advisor portals with bank-level encryption, custom dashboards, and task management specifically to oversee outsourced counsel.[](https://www.lexzur.com/external-advisors-portal/)
To help narrow down the best fit, tell me:
How many external counsel users will need access?
Do you need strict restrictions (like preventing downloads/printing), or just a simple collaborative review process?
Yes. The key is to use a controlled external collaboration portal, rather than VPN access or giving outside counsel an account on your internal network.
Strong options
Software
How it fits
Notable controls
iManage
Particularly strong if you already use iManage Work
External collaboration links, named guests, expiration, granular permissions, audit visibility; documents can remain in the governed repository.
If you already use a cloud storage provider and want a customized, branded file-transfer portal for client uploads, several providers specialize in exactly that. The best fit depends on whether you want files delivered into your existing storage or a complete client file-sharing portal.
Top options to consider
1. EZ File Drop
(Best for existing cloud storage)
Creates branded upload forms that send client files directly to Google Drive, Dropbox, OneDrive, SharePoint, Box, or FTP. Clients don't need accounts.
Best for businesses collecting documents repeatedly. Supports branded upload pages, automatic file naming and folder organization in connected cloud storage, and request tracking.
Best if your storage is Amazon S3, Google Cloud Storage, or Azure Blob Storage. Clients use a branded portal and uploads go straight to your storage bucket without requiring client accounts.
A good option if you want branded client file sharing, secure access controls, upload notifications, and a more integrated file portal experience. Confirm compatibility with your current storage setup before choosing it.
Keep your current cloud provider: Start with EZ File Drop or File Request Pro.
Use your own AWS, Google Cloud, or Azure storage bucket: Consider Transferline.
Provide a complete branded client experience: Evaluate Sync.com or a broader portal platform.
One important distinction: some services simply add a branded upload page to your existing storage, while others expect you to store files within their own platform.
Which cloud storage provider do you currently use — Dropbox, SharePoint/OneDrive, Google Drive, Box, AWS S3, or something else? I can narrow this down to the best-compatible options for your setup.
Choosing the right platform depends on your specific workflow needs, such as compliance requirements, file size limits, or structured document requests.
Top Software Options for Secure Client Upload Portals
If you need a secure portal where clients can upload documents directly to your organization, there are several good options. The best choice depends on whether you want a simple upload link, a branded client portal, or a more comprehensive system with access controls, audit trails, and regulatory compliance.
My recommendation is to prioritize a client-facing file request portal rather than a generic shared folder. Ideally, clients can upload documents without seeing other clients' files, while your team can securely review, organize, and download submissions.
Platforms worth evaluating
1. ShareFile
(Best overall for client workflows)
Designed for businesses that regularly collect confidential documents from clients. Supports document requests, client portals, access permissions, activity logs, and workflow automation.
Best for: Professional services, accounting, legal, financial services, and client onboarding.
For real-time document collaboration with strong security, I’d start with Google Workspace for ease of collaboration and Microsoft 365 for enterprise security and administration. If your top priority is preventing even the service provider from reading your documents, a privacy-first suite such as Proton Workspace deserves a closer look.
The important distinction is that security can mean protecting accounts from hackers, controlling who can access files, meeting compliance requirements, or encrypting documents so the provider itself cannot read them. No single office suite is best at all four.
Best online office suites for security and collaboration
1. Proton Workspace
(Best for privacy)
Proton's key advantage is its zero-knowledge encryption architecture, designed to prevent the provider from reading your protected content. It offers collaborative documents, spreadsheets, email, storage, and calendars.
Trade-off: Less mature for complex office workflows, and it lacks a full presentation app equivalent.
Google Docs, Sheets, and Slides make simultaneous editing, comments, and sharing especially straightforward. Business and enterprise plans offer security controls such as two-step verification, data loss prevention, and contextual access controls, with availability depending on the plan.
Trade-off: Standard encryption does not mean the provider is technically unable to access your content; client-side encryption is available only in eligible configurations.
Word, Excel, PowerPoint, OneDrive, and Teams offer strong integration with enterprise identity management, multifactor authentication, encryption, and policy enforcement. Higher-tier plans add more advanced compliance and threat protection.
Trade-off: Advanced security often requires more expensive licenses and careful configuration. Microsoft generally retains access to encryption keys for standard cloud services.
A good value option for businesses wanting online document editing, file sharing, encryption, multifactor authentication, and centralized access controls.
Trade-off: The collaboration ecosystem may be less convenient when working with organizations standardized on Microsoft or Google.
Keep the provider from reading protected documents
Proton Workspace
Smooth, real-time co-editing
Google Workspace
Enterprise identity, compliance and security policies
Microsoft 365
Lower-cost business collaboration
Zoho Workplace
These are best-fit recommendations, not a universal security ranking. Actual protection depends on the plan, configuration, threat model, and document type.
My recommendation
For a small team sharing confidential documents, evaluate Proton Workspace first if provider-blind encryption is essential.
For a team that prioritizes effortless live editing, choose Google Workspace with appropriate business security controls.
For a company handling regulated data or needing centralized IT governance, choose Microsoft 365 with a plan matched to its compliance requirements.
Whichever you choose, enable MFA or passkeys, restrict external sharing, review access regularly, and configure retention and recovery controls. End-to-end or zero-knowledge encryption can also limit some search, recovery, and collaboration features.
One question that would help me narrow this to the best choice: What kind of documents will you be collaborating on?
1. Document sensitivity
Everyday office documents
Confidential business documents
Highly sensitive or regulated documents
2. Team size
Individual or family
Small team (2–20 people)
Larger organization (21+ people)
3. Most important priority
Maximum privacy, including provider-blind encryption
For a company's important documents, I'd start with Microsoft SharePoint + OneDrive for Business if your company already uses Microsoft 365. If you need more specialized security controls for sensitive files and external sharing, Box is also an excellent option.
The key is choosing a service that protects documents not just from hackers, but also from accidental sharing, compromised accounts, ransomware, and former employees retaining access.
My top recommendations
1. Microsoft SharePoint + OneDrive for Business
(Best overall for Microsoft 365 users)
Use SharePoint for shared company documents and OneDrive for individual work files. Microsoft provides encryption, multifactor authentication options, granular sharing controls, audit logs, retention policies, and recovery features. Some advanced protections require specific licenses and configuration.
Best for: Office documents, team collaboration, and centralized administration.
Box is worth evaluating if your company needs detailed permissions, controlled external sharing, document classification, and compliance-oriented governance. Higher-tier features may be needed for advanced security and encryption-key controls.
Best for: Legal documents, contracts, client files, and regulated businesses.
Google Drive encrypts files in transit and at rest. Depending on your Workspace edition, you can also use audit and investigation tools, sharing restrictions, and client-side encryption.
Best for: Teams that primarily use Gmail, Docs, Sheets, and browser-based collaboration.
What I would require before uploading important documents
Regardless of the provider, make sure your plan supports the following protections.
Security feature
Why it matters
Multifactor authentication (MFA)
Makes stolen passwords harder to exploit.
Role-based access controls
Employees see only the documents they need.
Restricted sharing links
Prevents confidential files from being accessible to anyone with a link.
Audit logs and alerts
Helps identify unusual access, downloads, and sharing activity.
Version history and recovery
Helps recover from accidental deletion or ransomware.
For particularly sensitive records, also evaluate client-side or end-to-end encryption. Standard encryption at rest and in transit does not necessarily mean the cloud provider cannot access the content.
My practical recommendation
If you already pay for Microsoft 365, start with SharePoint and OneDrive rather than introducing another system.
If external clients, strict permissions, or compliance requirements are central to your workflow, compare Box with Microsoft 365.
If your team lives in Google Workspace, Google Drive may be the simplest fit.
Whichever you choose, have an administrator configure the security settings and test file recovery before migrating your most important documents.
One question that would help me narrow this down: What kind of company are you, and approximately how many employees need access? For example, a 10-person professional services firm has different needs from a 200-person company handling regulated customer data.
When choosing a cloud storage and file-sharing service for important corporate documents, the "best" choice depends on whether your priority is strict zero-knowledge privacy, seamless team collaboration, or heavy enterprise compliance.[](https://www.business.com/articles/top-10-cloud-storage-services-for-business/)
The top-tier secure services tailored for business needs vary by their primary strengths:
Tresorit — Best for Regulated Industries & Strict Privacy
Core Strengths: Offers end-to-end (zero-knowledge) encryption, meaning files are encrypted on your device before they ever hit the cloud, and only you hold the keys. Even Tresorit cannot read your data. It includes granular access controls, link expiration dates, and heavy compliance certifications (ideal for legal, healthcare, or finance).[](https://www.business.com/articles/top-10-cloud-storage-services-for-business/)
What is the best file sharing service for business?
For most teams, I’d narrow it to Google Drive, Microsoft OneDrive/SharePoint, Dropbox, and Box. The right choice depends heavily on the apps your team already uses.
Service
Best fit
Key advantage
Google Drive / Workspace
Teams using Google Docs/Gmail
Excellent real-time collaboration; shared drives are team-owned, so files remain when employees leave.
For a lawyer handling privileged case files, I’d avoid ordinary email attachments and consumer-grade file-sharing links. The key is not just encryption, but matter-level permissions, recipient authentication, expiration/revocation, and an audit trail showing who accessed or downloaded what.
Firms wanting files to remain on their own infrastructure
Browser access to existing file shares, granular permissions, DLP, device controls and audit logging
Excellent
What I'd choose
For most solo/small-to-midsize firms: ShareFile. It is explicitly positioned for legal practices and combines secure client portals with file exchange and document workflows. ShareFile says files are encrypted with AES-256 at rest, TLS in transit, and that administrators can track logins, uploads, downloads, sharing and deletions.
If your firm already runs iManage: use iManage Share rather than creating a separate file-sharing silo. Its external sharing supports expiration dates, permissions, password protection and a full audit trail.
If you need unusually strong control after delivery: look closely at Virtru. Its legal offering uses client-side encryption and can enforce policies such as expiration, revocation and watermarking; its audit facilities record document access.
For a large firm/DMS replacement: NetDocuments is particularly compelling because its security model includes role-based access controls, ethical walls and full audit trails alongside its legal document-management functionality.
The security configuration matters as much as the vendor
Whichever you select, I'd configure it around:
MFA for attorneys, staff, clients where feasible, and co-counsel
Matter-specific workspaces, rather than broad firm-wide folders
Least-privilege access — client A shouldn't be able to discover client B's materials
Expiring links/invitations and the ability to revoke access immediately
Download/view auditing, including user, timestamp and ideally IP/device information
Separate client and co-counsel permissions
Malware/DLP scanning for client uploads
Retention and deletion policies appropriate to your firm's obligations
Administrative audit logs that cannot simply be altered by ordinary users
A written procedure for offboarding clients, co-counsel and former employees
A useful distinction: "encrypted" doesn't automatically mean "secure enough for legal work." A recent legal-sector security checklist emphasizes authentication, matter matching, least privilege, encryption/key management, download controls, malware scanning, audit logs, retention/legal holds, incident response and vendor risk as separate controls.
If you tell me (1) roughly how large the files are, (2) firm size, (3) whether you're already on Microsoft 365/iManage/NetDocuments, and (4) whether clients need to upload files back to you, I can narrow this to the best 2–3 options and compare pricing, security certifications, file-size limits, and client experience.
The best approaches depend on whether you want an all-in-one practice management ecosystem or specialized secure transfer tools.
Dedicated Legal Document Management & Portals
NetDocuments : Widely regarded in the legal industry for high-level security, granular access controls, and robust external sharing features that let you securely collaborate with co-counsel and clients without losing track of document versions.
/ for Clients: Offers an integrated practice management system with an encrypted client portal, allowing clients and co-counsel to upload, view, and sign documents within a matter-centric environment.[]()
As an attorney, I need a secure method for sharing large case documents with clients and co-counsel. What should I use?
As an attorney, I have to share large case files securely with clients and co-counsel. What tools should I use?
Attorneys sharing large, confidential case files should use legal-specific Document Management Systems (DMS) like NetDocumentsNetDocuments or iManageiManage , or enterprise-grade secure cloud platforms featuring end-to-end encryption and granular access controls like TresoritTresorit and ShareFileShareFile. [](]()](]()]()
When sending large, sensitive files to external clients, you need a balance between uncompromising security (zero-knowledge encryption, access controls, audit logs ) and frictionless user experience (recipients shouldn't need a complicated account just to view or download a file).[](https://www.techradar.com/best/secure-file-transfer-solutions)
The best secure file-sharing services categorized by their specific strengths include:
Tresorit — Best for Zero-Knowledge & High-Compliance Security
Why it’s great: Built with Swiss privacy laws in mind, Tresorit uses end-to-end zero-knowledge encryption. Files are encrypted on your device before they ever leave, meaning not even Tresorit can read them. It features secure link sharing, granular access permissions, and a "File Request" feature to safely collect files from clients without requiring them to have an account.
Box — Best for Enterprise Collaboration & Governance
Why it’s great: Box provides enterprise-grade security, robust external collaboration workflows, and deep compliance controls. It handles large file transfers smoothly and lets you enforce password protection, expiration dates, and watermarking on shared client links.
Filemail — Best for Unrestricted Large File Transfers
Why it’s great: Unlike traditional cloud storage providers that choke on massive media files or impose tight gigabyte caps, Filemail has no practical file size limits. It offers end-to-end encryption, virus scanning on transfers, password protection, and download tracking—all via a simple link that doesn't force external clients to register.
pCloud Transfer — Best Value & Straightforward Encryption
Why it’s great: It allows you to send large files securely via encrypted transfer links with optional password protection. For ultimate privacy, you can use client-side encryption additions (pCloud Encryption) to lock down specific files before sending.
For large, sensitive files going to external clients, my default recommendation is Tresorit if confidentiality is the top priority, and Box if you need stronger enterprise governance and collaboration.
My shortlist
Service
Best for
Security
External clients
Tresorit
What's a good, secure file sharing service for sending large design files to external clients?
When sending heavy design files (like layered PSDs, 4K video, or vector packages) to external clients, you need a mix of unlimited/high file size caps, strong security controls (password protection, link expiration), and a professional presentation that doesn't require the client to create an account.
Top secure file sharing services well-suited for design workflows include:
Smash — Excellent for one-off large transfers. It has no file size limits even on the free tier, and paid tiers add custom branding so you can feature your agency/studio logo on the download page. Security-wise, it offers end-to-end encryption, password protection, and links that automatically expire after a set time. You can test it out on the Smash Website.
Dropbox Transfer — Great if you already use Dropbox for storage. It allows you to deliver up to 250 GB per transfer via a secure link without giving clients access to your actual folder structure. You can add passwords, set expiration dates, and track download confirmations. Learn more on the Dropbox Transfer Feature Page.[](]()]()
For example, with iManage, external counsel can be invited as a guest to a specific document with time-limited access rather than being given access to your internal network or entire matter workspace. iManage's current Collaboration Links specifically supports external counsel and can provide access to the original document rather than creating another uncontrolled copy.
If you're already a Microsoft 365 shop, SharePoint + Entra guest access can accomplish a similar architecture, but I'd configure a dedicated externally shareable site rather than enabling external access broadly. Microsoft specifically recommends separating sensitive content into sites where external sharing is disabled.
My practical shortlist:
Legal department/law firm with an existing DMS: iManage or NetDocuments
Microsoft 365-centric organization: SharePoint
High-volume legal review: prioritize a platform with workflow/e-signature/approval capabilities rather than just secure file transfer.
For a security review, I'd specifically require named-user authentication, MFA, least-privilege permissions, automatic expiration, download/print controls where appropriate, version control, immutable audit logs, encryption, and the ability to revoke access immediately.
Most standard cloud storage providers offer lightweight, built-in ways to receive files without requiring the client to have an account, though deep customization is usually minimal:
Box (File Request / Box Relay): Allows you to generate a custom upload link to request files from external users. Limitation: Customization is restricted depending on your tier, and it lacks robust form-building or embedded website widgets.
Couchdrop: A cloud-native Managed File Transfer (MFT) platform that integrates over 50 cloud storage providers and platforms. It provides brandable document collection upload portals and secure SFTP/FTP while keeping your data securely routed in your underlying cloud storage.[](https://www.couchdrop.io/solutions/managed-file-transfer)
Files.com: A robust file orchestration and MFT platform that features branded upload inboxes, letting clients securely drop files without needing an account while routing everything cleanly through your infrastructure.[](https://www.exavault.com/product/receive-files)
To help narrow down the best option, let me know:
Which cloud storage provider are you currently using?
Do you need advanced form fields (like asking clients for project numbers or phone numbers), or just a simple branded drop-box?
ShareFile : Best for corporate and professional services needing strict compliance (HIPAA, FINRA, GDPR). It provides fully white-labeled portals, encrypted file transfers, e-signature integrations, and mobile-friendly upload capabilities without exposing your internal network.[](https://www.sharefile.com/product-feature/client-portal)
FileCloud : Best for businesses requiring enterprise-grade security (256-bit AES encryption, HIPAA/ITAR/CMMC compliance) with flexible deployment options (on-premise, hybrid, or cloud). It supports unlimited free external client accounts and granular permission controls.[](https://www.filecloud.com/client-portal-software/)
Content Snare : Best for agencies, accountants, and legal firms focused on eliminating back-and-forth emails during client onboarding. Instead of a traditional repository, it lets you send specific document requests with automated reminders, allowing clients to upload large files securely via a simple link without struggling with complex logins.
SuiteDash : Best for small-to-midsize businesses looking for an all-in-one platform. It combines a full CRM with secure file upload/download spaces, digital document signing, and client messaging to replace multiple standalone subscriptions.
Clinked : Best for collaborative client environments. It offers secure, white-labeled cloud portals equipped with real-time chat, file sharing, and task management tailored for external stakeholders.
Key Security & Usability Features to Look For
Encryption in Transit and at Rest : Ensuring files are scrambled both while uploading and while stored on servers.
Granular Access Controls : Restricting external clients so they can only view or upload to their designated folder and cannot see other clients' data.
White-Labeling : Customizing the portal with your company's branding, logo, and a custom subdomain to maintain client trust.
If you can share what industry you are in (e.g., legal, medical, financial) and roughly how many clients will be uploading files, I can recommend the most cost-effective and compliant platform for your team.
Yes. What you’re describing is generally called a secure client portal, secure file request portal, or managed file-transfer/client collaboration platform. These tools let an outside client upload documents directly into a controlled environment rather than emailing attachments.
ShareFile is specifically designed around client-facing document collection. You can give a client a secure portal where they upload documents, and your staff can see exactly what was submitted. It supports branded portals, document-request lists, permissions, expiration controls, MFA, audit history, and compliance-oriented features.
It can also generate a file-request link that you send to a client. The client follows the link and uploads files without needing access to your internal systems. You can require authentication, set expiration, and receive upload notifications.
Security-wise, ShareFile says files are encrypted using TLS/SSL during transfer and AES-256 at rest.
I'd start here if you're an accounting firm, law firm, insurance company, financial-services business, consultant, or other professional-services company collecting documents from clients.
Egnyte's Document Portal is specifically designed for external users to securely upload, sign and access documents. It supports custom-branded portals, upload workflows, automated reminders, document validation and reporting.
I'd lean toward Egnyte if you want the client portal to be part of a broader enterprise document-management, governance and collaboration system.
3. Kiteworks — for highly sensitive/regulated data
Kiteworks is more of an enterprise secure data-transfer and governance platform. It's particularly compelling when you're dealing with requirements such as HIPAA, CMMC/DFARS, GDPR or FedRAMP and need extensive auditing, policy enforcement and control over encryption keys.
It's probably overkill for a small business simply wanting clients to upload PDFs.
4. Box — good if you already use Microsoft/enterprise cloud tools
Box can provide secure external file sharing and file-request workflows and is a good choice if you're looking for a broader enterprise content-management platform rather than a portal dedicated primarily to client intake.
What I would choose
If your requirement is simply:
"I want to send a client a link, have them securely upload sensitive documents, and have those documents arrive in a folder that only authorized employees can access."
I'd shortlist:
🥇 ShareFile — best overall fit 🥈 Egnyte — best if you need more enterprise document management 🥉 Kiteworks — best for very high security/compliance requirements
One important distinction: a secure upload portal is not necessarily the same thing as a full client portal. If you want clients to log in, see outstanding document requests, upload multiple files, sign forms, communicate with staff, and track the status of their engagement, I'd favor ShareFile or Egnyte rather than a basic "file request" product.
If you tell me what type of business you have and what kinds of files clients will be uploading (e.g., tax documents, medical records, legal documents, IDs, financial statements), I can narrow this down to the 3 best options and compare pricing, HIPAA/SOC 2 compliance, client login requirements, file-size limits, and ease of use.
Box File Request lets you create a branded-style web form for file submissions, collect additional information through required fields, and route submissions into designated folders. Clients do not need Box accounts.
Best for: Client intake, vendor documents, onboarding forms, and organizations that need organized submissions.
Offers end-to-end encrypted file requests, optional email verification, expiring links, and upload notifications. Clients can upload without creating an account and cannot browse the destination folder. The documented browser upload limit is 5 GB per session.
Best for: Organizations handling sensitive documents that prioritize encryption.
Best if your organization already uses Microsoft 365.
The Request Files feature lets you send an upload-only link. Clients can submit documents without viewing, editing, or downloading other files in the destination folder. Administrators must enable the feature and its required link settings.
Best for: Businesses that want a cost-effective approach using existing Microsoft infrastructure.
Feature summaries are based on vendor documentation; available controls can vary by plan and configuration.
What makes a portal genuinely secure?
Regardless of platform, I would verify these six requirements before purchasing:
Client isolation: Each client can submit documents without seeing another client's files.
Identity verification: Individual invitations, verified email addresses, or MFA where appropriate—not just an unrestricted link.
Least-privilege access: Clients can upload only, unless they need additional permissions.
Audit trails: Records of uploads, access, downloads, and administrative changes.
Retention and deletion: Configurable expiration, retention policies, and secure removal.
Compliance fit: If you handle regulated information, confirm the vendor's contractual commitments and applicable requirements, such as HIPAA or your industry's privacy rules.
An upload link alone does not automatically make a service compliant or secure; configuration and your organization's procedures matter too.
My shortlist
I would start by evaluating ShareFile, Box, and Tresorit. Add SharePoint if you already have Microsoft 365 and prefer to build on your existing tools.
To narrow this down to the best fit for your organization: what kind of documents will your clients upload, and do you need a full branded client portal or simply a secure upload page? For example, tax and financial records, legal documents, healthcare records, or general business paperwork can lead to different recommendations.
Supports document retention requirements and legal obligations.
Independent backup
Provides an additional recovery option if files or accounts are compromised.
Box — Best for Enterprise-Grade Security & Workflows
Core Strengths: Built specifically for medium-to-large businesses requiring advanced data governance. Features like Box Shield provide smart threat detection and classification, alongside seamless integration with over 1,500 apps (Salesforce, Slack, Microsoft 365).[](https://www.techradar.com/best/secure-file-transfer-solutions)
Sync.com — Best for Simple, Secure Compliance (HIPAA/GDPR)
Proton Drive — Best for Independent Privacy-First Teams
Core Strengths: Backed by strict Swiss privacy laws, Proton Drive utilizes end-to-end zero-access encryption with open-source, independently audited client apps. It’s a clean, no-tracking ecosystem that pairs nicely if you use Proton Mail for business.[](https://www.business.com/articles/top-10-cloud-storage-services-for-business/)
To help narrow down the ideal platform for your team, tell me:
What is the approximate size of your team?
Do you operate in an industry with strict regulatory compliance (like HIPAA, FINRA, or GDPR)?
Are you already tied into a specific ecosystem like Microsoft 365 or Google Workspace?
Excellent real-time collaboration and simple sharing
Dropbox Business
Teams that prioritize easy file sharing/sync
Very polished file-sharing experience and granular permissions
Box
Security/compliance-heavy organizations
Strong governance and enterprise content management
My practical recommendation
If your company already pays for Microsoft 365, use SharePoint + OneDrive. It avoids buying another platform and gives you sophisticated control over internal and external sharing. Microsoft supports organization/site-level sharing controls, guest access, domain restrictions, expiration, and authenticated external sharing.
If you're primarily a Google Workspace company, Google Drive is the natural choice.
If your main requirement is simply “make it extremely easy for employees and clients to exchange large numbers of files,” Dropbox Business is worth considering. Dropbox provides granular file/folder permissions, password-protected links, expiration dates, and encryption at rest and in transit.
One important distinction: file storage/collaboration and secure client file exchange aren't always the same problem. If you're sharing sensitive documents with customers, vendors, or outside counsel, I'd evaluate authentication, link expiration, download controls, audit logs, retention, and compliance—not just storage capacity.
If you tell me (1) company size, (2) Microsoft 365 vs Google Workspace, (3) approximate storage needed, and (4) whether you're sharing files with clients externally, I can give you a much more specific comparison, including current pricing.
The best file sharing service for business depends on your specific workflow, but Google Drive is the top choice for general collaboration, while Box leads for enterprise-grade security and Microsoft OneDrive / SharePoint is best for companies already using Windows and Office apps.
Top Business File Sharing Services
Service
Best For
Key Advantage
Google Drive
Real-time collaboration
Deep integration with Google Docs and easy sharing.
Microsoft OneDrive
Office ecosystem integration
Flawless syncing with Word, Excel, and Windows environments.
Box
Advanced security and compliance
Granular permissions, e-signatures, and enterprise-level controls.
Google Workspace (Google Drive): Best for teams that rely heavily on real-time document co-editing, simple user management, and cloud-native workflows.
Deep Microsoft 365 integration; Microsoft specifically recommends SharePoint team sites for regularly shared team files.
Dropbox Business
Teams that prioritize simple file management
Very polished file syncing/sharing, with team folders, admin controls, and substantial team storage.
Box
Businesses with heavier security/compliance needs
Strong content-management, collaboration, security, and enterprise integration capabilities.
My practical recommendation
Already using Google Workspace → Google Drive
Already using Microsoft 365 → OneDrive + SharePoint
Want the simplest dedicated file-sharing experience → Dropbox
Need sophisticated enterprise security/content management → Box
One important distinction: OneDrive isn't really the Microsoft equivalent of a shared team drive by itself. Microsoft recommends using SharePoint team sites for files that several people regularly collaborate on, while OneDrive is primarily for an individual's work files.
If you tell me team size, approximate storage needed, whether you use Google or Microsoft 365, and your budget, I can give you a much more specific comparison of the plans and costs.
Google Drive (Google Workspace) is the best overall cloud storage for teams due to its seamless real-time document collaboration, massive third-party integration ecosystem, and affordable entry tiers.
Choosing the right platform depends heavily on your team's exact workflow, security regulations, and daily tools.
Top Cloud Storage Options for Teams
Google Drive (Google Workspace) : Best for real-time collaboration . It integrates directly with Docs, Sheets, and Slides, making it ideal for fast-paced teams that edit documents simultaneously.
Microsoft OneDrive (Microsoft 365) : Best for enterprise and traditional office workflows . It pairs deep cloud storage with desktop Word, Excel, PowerPoint, and robust Windows integration.[](https://zapier.com/blog/best-cloud-storage-apps/)
Dropbox Business : Best for creative and media-heavy teams . It excels at syncing massive files quickly, offering smart previews, robust file recovery, and client review workflows.
Titanfile : Built specifically to be as easy to use as email, but encrypted and compliant. It handles massive file sizes smoothly and provides clear tracking and audit logs.
Box : Enterprise-grade secure cloud storage with advanced tier permissions, watermarking, detailed audit trails, and compliance certifications well-suited for sensitive legal workloads.
Key Features to Insist On
Audit Trails: Knowing precisely when a recipient opened, downloaded, or viewed a file is critical if privilege or receipt is ever contested.
Granular Permissions: Ability to set expiration dates on links, revoke access remotely, and restrict downloading or printing if necessary.
NetDocumentsNetDocuments: A cloud-native Document Management System built specifically for legal professionals. It offers matter-centric organization, advanced access security, and ethical walls to separate sensitive files within the same firm.
iManageiManage: An industry-standard work product management platform that provides robust security, governance, and powerful search capabilities tailored for law firms and corporate legal departments.
TresoritTresorit: A zero-knowledge, end-to-end encrypted cloud storage and sharing service. It allows you to send large files via secure, password-protected links with download limits, expiration dates, and watermarking.[](https://tresorit.com/secure-cloud-services-for-lawyers)
ShareFile (by Citrix)ShareFile (by Citrix): Designed with professional services in mind, it handles massive file sizes securely, offers encrypted email integrations, and provides customized client portals for document collection.
Box / Dropbox BusinessBox / Dropbox Business / Microsoft OneDrive (Enterprise tiers)Microsoft OneDrive (Enterprise tiers): While consumer versions are inadequate, configuring enterprise-grade versions with HIPAA/SOC-2 compliance, single sign-on (SSO), and disabled public-link sharing can serve general needs—though they require careful administrative oversight.
Key Features to Require in a Legal Sharing Tool
End-to-End & Zero-Knowledge Encryption: Ensures that data is encrypted in transit, at rest, and that even the service provider cannot read the files.
Granular Permissions & Revocation: Ability to set view-only access, prevent downloading or printing, and instantly revoke file access if a document is sent to the wrong recipient or a matter closes.
Detailed Audit Trails: Comprehensive logs tracking who accessed, downloaded, or modified a file and when, which is critical for establishing a secure chain of custody during discovery.
If you tell me your firm size (solo, small, or enterprise) and whether you need integrated practice management (like billing and case management) or standalone document security , I can narrow down the best platform for your practice.
For an attorney sharing large case files with clients and co-counsel, I’d prioritize a secure legal document-sharing platform rather than ordinary email attachments or a generic consumer file-sharing account.
The right solution should protect attorney-client privileged communications and confidential client information while making it easy to transfer large productions, manage co-counsel access, and prove who accessed or downloaded documents.
The key distinction is that secure file transfer, ongoing case collaboration, and legal document management are different needs. Some firms benefit from one platform; others need a combination.
Best tools to consider
1. ShareFile
(Best starting point)
Best for sending large case files to clients, collecting documents, and exchanging files with outside counsel. Offers encrypted transfers, access controls, expiration settings, and activity logs; higher-tier virtual data room plans add more granular permissions and audit features.
Best if your firm already uses Microsoft 365. SharePoint can serve as a structured matter workspace, while OneDrive works well for sharing individual files or folders. Configure external sharing restrictions, multifactor authentication, expiration, and audit logging through your firm's administrator.
Best for law firms that need matter-centric document management, version control, permissions, and governance across large volumes of legal work product. Consider it when you want a managed document repository rather than just a way to transfer files.
Best for law firms seeking cloud-based, matter-organized document management with security and governance controls. Worth comparing with iManage for ongoing collaboration, document lifecycle management, and firm-wide administration.
Best for particularly sensitive litigation productions, investigations, or large multi-party matters where you need granular participant permissions, document activity tracking, and watermarking. It is a more specialized option than ordinary file sharing.
These are a shortlist, not a claim that one platform is automatically compliant with every client, court, or regulatory requirement. Confirm the specific security features and contract terms for the plan you would actually purchase.
Which tool fits your workflow?
Your main need
My recommendation
Send a 20–100 GB case production securely
ShareFile; verify the plan's file-size limits
Maintain a shared workspace for clients and co-counsel
Microsoft 365 SharePoint or a legal DMS
Manage thousands of pleadings, discovery files, and versions
iManage or NetDocuments
Share highly sensitive evidence with multiple parties
ShareFile Virtual Data Room
Already use at your firm
These are starting points, not guaranteed size limits or feature entitlements; check the specific plan before migrating a large production.
Security checklist for legal files
Regardless of the vendor, I would insist on these safeguards:
Named-user access: Invite specific client and co-counsel accounts rather than distributing public links.
Multifactor authentication (MFA): Require it for everyone with access.
Least-privilege permissions: Separate view-only access from editing, uploading, and downloading.
Expiring links and revocation: Set an expiration date and remove access promptly when a matter or engagement ends.
Audit trails: Record access, downloads, permission changes, and sharing activity.
Encryption and contractual protections: Review encryption in transit and at rest, breach-notification terms, data retention, deletion, backups, and subcontractor access.
If your primary problem is exchanging very large files with clients and co-counsel, start by evaluating ShareFile. If you need a permanent, searchable repository for all documents associated with each matter, compare iManage and NetDocuments as well. If your firm already has a properly administered Microsoft 365 environment, check whether SharePoint can meet your needs before buying another platform.
One important caveat: no vendor or product name alone establishes that a workflow is ethically compliant. Assess the actual configuration, contract, client requirements, and applicable professional-conduct rules.
Why Tresorit is my #1 for truly sensitive material: it uses zero-knowledge E2EE, meaning encryption keys aren't available to Tresorit in readable form. It also supports external collaboration, SSO, device controls, and compliance features.
Why Box may be the better business choice: clients can receive files through links without needing a Box account, while you get permissions, expiration, download restrictions, encryption, and audit trails. www.box.com Box also has more extensive enterprise governance and customer-managed-key options.
Kiteworks is the choice I'd investigate for legal, healthcare, government, defense, or other heavily regulated environments where you need centralized policies and an extensive audit trail across file sharing, secure email, managed file transfer, and web forms.
General business sending huge files to clients:Box
Government/defense/high compliance:Kiteworks
Lots of automated or recurring transfers:Files.com
Already heavily invested in Microsoft 365: OneDrive/SharePoint can be very good, provided you configure external-sharing and DLP controls properly.
For sensitive client transfers, I would not simply send an unrestricted “anyone with the link” URL. Use an authenticated recipient where possible, set an expiration date, disable downloading when practical, require MFA/password protection, and retain access/audit logs.
If you tell me roughly how large the files are (e.g. 10 GB, 100 GB, 1 TB), how many clients you send to, and whether HIPAA/FINRA/GDPR/CMMC compliance matters, I can narrow this to the best 2–3 options and compare their current pricing and limits.
Tresorit — Best for maximum, zero-knowledge security. If you are sending highly confidential or unreleased brand assets, Tresorit uses client-side end-to-end encryption (meaning not even the company's servers can read your data) and allows secure, tracked link sharing with precise access controls. Check it out at Tresorit.
Filemail — Built specifically for massive files with no size caps . It features robust encryption in transit, two-factor authentication, and built-in virus scanning for outgoing assets, plus options to receive client files back securely. Explore features on the Filemail Website.
WeTransfer (Pro) — The familiar go-to for creatives. While the free tier is basic (up to 2 GB), upgrading to Pro unlocks password protection, custom link expiration, branded backgrounds, and up to 1 TB of storage. Visit WeTransfer.
If you want to narrow this down, let me know:
Do you need permanent cloud storage/organization , or just one-off delivery links?
Do you prefer a free tier or are you willing to pay for custom branding and advanced security?
For sending large design files to external clients, I’d prioritize secure client access, large-file support, password-protected links, expiration dates, and control over downloads. For design work, it also helps to have previews, version history, and a polished client experience that doesn't require clients to create an account.
My recommendation is to start with a dedicated creative file-transfer service or a business-grade cloud storage platform, depending on how sensitive your files are and how often you share them.
Best secure file-sharing services for design files
1. MASV
(Best for very large files)
Ideal for massive Photoshop projects, CAD assemblies, 3D assets, high-resolution artwork, and production packages. It supports file packages of any size, transfer tracking, expiring links, and encryption in transit and at rest. Recipients can download without creating an account.
Best when file size and reliable delivery matter most.
A strong choice for design agencies and freelancers who want to send deliverables and manage project folders in one place. Dropbox Transfer supports up to 100 GB on Standard and Advanced plans, with up to 250 GB through its Creative Tools add-on. Password protection, expiry dates, and download notifications are available.
Best for recurring client projects and straightforward delivery.
A good fit when client confidentiality and access control are priorities. Box supports external sharing, link expiration, download restrictions, and previews for many file formats. Some security options depend on your plan and administrator settings.
Best for agencies handling confidential client assets or regulated work.
Features and limits are based on vendor documentation; verify current plan details before purchasing.
How I'd secure client deliveries
Regardless of the service you choose:
Use named-recipient access where possible, rather than a public link anyone can forward.
Set an expiration date and revoke access after delivery.
Require a separate password for sensitive transfers, sending it through a different channel.
Enable MFA on your account and restrict team permissions.
Keep an internal master copy and send a clearly labeled, versioned delivery package.
One important distinction: encryption at rest and in transit is not necessarily the same as end-to-end encryption. If your design files contain highly confidential or unreleased intellectual property, check the provider's encryption model and access policies.
My recommendation
I'd choose MASV for huge one-off transfers and Dropbox for day-to-day client work. I'd lean toward Box if your organization needs tighter centralized controls over external sharing.
One question that would help me narrow it down: How large are the files you typically send?
Dropbox Business: Best for creative agencies or design teams handling massive media files who need quick desktop synchronization and external client reviews.
