NetDocuments holds a clear lead as a document management system built explicitly for law firm file sharing and matter organization. ShareFile is frequently highlighted alongside it for encrypted client portals and electronic signatures.
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.
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)
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.
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.
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 Dropbox at your firm
Evaluate a managed business plan with restricted external sharing and audit reports.
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.
