As a company that needs client access, which tools allow granular client permissions and guest access without extra paid seats?

If your requirement is “clients can access only their own work, with granular permissions, and I don’t pay a full seat for each client,” the strongest options I found are:

1. Asana — best if free external access is the priority

Asana explicitly says guests are free and don't consume subscription seats. Guests can be external clients, contractors, vendors, etc., and can be invited to specific projects, teams, or tasks.help.asana.com

Its current pricing page also advertises “Unlimited free guests.”asana.com

Good for: giving each client access to their project without letting them become part of your internal team.

2. Teamwork.com — particularly strong for agencies

Teamwork has a dedicated Client User license specifically designed for bringing clients into projects without additional subscription cost. Client users have reduced administrative privileges but can participate in projects, including project-level permissions.support.teamwork.com+2

It also has a separate Collaborator role for more restricted external participation, such as completing assigned tasks, commenting, messaging, and viewing files.support.teamwork.com+2

This is probably the most directly aligned model if you're a services/agency company managing many separate clients.

3. ClickUp — powerful, but watch the guest-seat distinction

ClickUp supports view-only guests for free, with unlimited view-only guests on paid plans. However, clients who need granular interaction—commenting, editing, etc.—can become permission-controlled guests, which may require a paid guest seat depending on your plan.help.asana.com+3

Interestingly, the Free Forever plan allows unlimited guests at no charge, but those guests get full permissions only, rather than granular permission controls.clickup.com

So ClickUp has the functionality, but its pricing model is less clean for your exact requirement.

4. monday.com — workable, but guest volume matters

monday.com's Standard plan allows guests, but uses a 4:1 billing model: up to three guests are effectively free; every group of four guests consumes one billed seat. Pro and Enterprise allow unlimited guests.support.monday.com

Guests can be restricted to the boards they're invited to, which is useful for client separation.monday.com

Bottom line

If I were narrowing this specifically around your requirement:

Asana → best combination of free client seats + straightforward external access.
Teamwork.com → strongest model if you're an agency/client-services company and need clients to actively participate in projects.
ClickUp → strongest if you want a highly customizable workspace and can tolerate its guest-seat rules.
monday.com → good, but less attractive if you have lots of clients because guest groups eventually affect billing.

One important distinction: “free guest” doesn't necessarily mean “granular guest.” ClickUp, for example, gives free guests but limits their permissions on the free plan, while Asana and Teamwork are much closer to the combination of external + interactive + no paid seat you're describing.help.clickup.com

If you tell me whether your clients need view-only, comment, upload files, approve, edit tasks, or create tasks, I can narrow this to the 2–3 tools that actually satisfy your permission model.

If your priority is client access + granular permissions + no paid seat for each client, the strongest options I found are:

My practical shortlist

1. Asana — strongest match for your requirements. Asana explicitly says guests don't count toward your membership limit, and its paid plans include unlimited free guests. Guests can be restricted to the projects, tasks, or teams they're invited to. Its current pricing also describes clients as accessing the platform without taking up a seat.Asana+2

asana.com

2. Notion — excellent if your client workspace is document/portal-heavy. Notion distinguishes guests from members and supports page-level permissions, teamspaces, and permission groups. Paid plans currently advertise unlimited guests, while the Free plan has a 10-external-guest limit.Notion+1

notion.com

3. ClickUp — powerful, but watch the guest-seat distinction. ClickUp has very granular permissions: view, comment, edit, and full edit. View-only guests are free and unlimited on paid plans, but permission-controlled guests consume a finite number of included guest seats; additional permission-controlled guests can cost the equivalent of a member seat.ClickUp Help+2

clickup.com

4. monday.com — less attractive if you have lots of active clients. Its Standard plan allows guests, but billing uses a 4:1 ratio: three guests are effectively free, and the fourth guest triggers one billed seat. Pro/Enterprise have unlimited guests.Monday Support+1

Bottom line

If by "granular" you mean each client can see only their own projects/data and can comment/edit without becoming a paid user, I'd start with Asana and Notion, then evaluate ClickUp if you need more elaborate task-level permissions.

If you tell me what kind of client access you need (e.g. view-only, comment, upload files, edit tasks, approve work, access only their own portal/project), I can narrow this down to the 2–3 tools that fit and compare their current pricing.

Finding a tool that balances fine-tuned data security with zero extra charges for external users can be tricky, as many modern platforms gate granular permissions behind expensive enterprise tiers. However, several strong project and client management solutions handle external guest access and permissions without forcing you to buy a paid seat for every client.

Top Tools with Free Client/Guest Access & Permissions

• Basecamp — Famous for its flat-rate pricing model where you only pay for internal team members. You can invite an unlimited number of clients, contractors, and guests to specific projects for free. While its permissions are more role-based (project-by-project visibility) rather than ultra-granular cell-by-cell controls, it completely eliminates per-seat costs for external stakeholders.
• Asana — If your company account is structured as an "Organization" (tied to a corporate email domain), inviting external users with a different email domain classifies them as Guests . Guests are completely free and do not consume a paid seat. You can restrict their access granularly down to specific projects, giving them view-only or commenter-only permissions so they cannot alter custom fields or underlying workflows.[forum.asana.com](https://forum.asana.com/t/adding-guest-to-a-workspace/92297)[[2](https://help.asana.com/s/article/guests-faq?language=en_US)](https://help.asana.com/s/article/guests-faq?language=en_US)
• ClickUp — Offers flexible guest management where view-only guests are free on paid tiers. You can control what they see down to the folder, list, or task level. Note: Fully permission-controlled interactive/editing guests may pull from a ratio allowance or incur costs depending on your exact tier, so you must verify your configuration to keep it free.[forum.asana.com](https://help.clickup.com/hc/en-us/articles/6310022323991-Guest-type-user-roles)
• Notion — Excellent if your client access strategy relies on shared collaborative documents, roadmaps, or knowledge bases. On paid plans, adding free guests to specific pages allows you to toggle fine-tuned permissions (can view, comment, or edit) without expanding your billing count. Clients can log in or view shared pages seamlessly.
• Freedcamp — Specifically built with a generous stance on external collaboration, offering free Guest and Read-Only user roles on all paid plans. Clients can be restricted to observing or commenting on specific applications (like milestones or tasks) without breaking internal workflows or adding to your invoice.

If you can share:

• What level of interaction your clients need (view-only, commenting, or editing tasks)
• Whether you prefer a dedicated client portal layout or standard project boards

I can help you narrow down which of these tools best fits your security requirements.

When you need secure, external client access with granular control over what clients see—without being forced to pay for an extra seat for every single client—several platforms handle this via specialized free guest roles, restricted views, or distinct client portals.

The top tools that offer granular permissions and guest/client access without consuming paid user licenses include:

1. Basecamp (Business / Pro Unlimited plans)
   • How it works: Basecamp includes unlimited free client/guest access on its standard business-tier flat pricing.
   • Granular permissions: You choose exactly which specific projects, to-dos, documents, and message boards a client can see. Anything outside of their designated project remains completely invisible to them.
2. Project Insight (Client View feature)
   • How it works: Built specifically with dedicated, free interactive client user logins that do not draw from your paid seat pool.
   • Granular permissions: Offers highly customized client home screens and targeted item visibility. You can control down to the specific task, issue, file, milestone, or report what the client can view, approve, or update while keeping internal conversations strictly private.[projectinsight.com](https://projectinsight.com/features/client-view)[](https://projectinsight.com/features/client-view)
3. Teamwork.com (Selected Plans with Client Users)
   • How it works: Designed heavily for client services and agencies, supporting unlimited free client users on designated business plans rather than treating external stakeholders as costly full seats.
   • Granular permissions: Provides a dedicated "Clients area" and custom client views where you can grant specific project tracking access, task approvals, and file sharing while hiding internal-only budgets and back-end team chatter.
4. Trello (Standard/Premium Workspaces)
   • How it works: Allows you to invite unlimited free members/guests to individual boards or workspace collections depending on board privacy settings.
   • Granular permissions: By setting specific boards as "private" or "workspace-visible" and inviting clients strictly as board members (or using public/restricted sharing links), you control data exposure. Note that it lacks an advanced overarching multi-client portal, operating best as a visual Kanban board per client.
5. Notion (Team Plans)
   • How it works: Team plans offer unlimited free guests.
   • Granular permissions: You can share individual pages, project databases, or client sub-workspaces with specific email addresses, assigning them granular permissions (can view, can comment, or can edit) without upgrading them to full team members.

If you'd like to narrow this down, tell me:

• Do your clients need to actively edit/create tasks , or just view progress and leave approvals?
• Do you prefer a flat-rate pricing model (like Basecamp) or a per-user model with free guests (like Asana/Notion)?

I can help you pick the ideal fit for your workflow.

When you need external clients to log in, view progress, or review deliverables without blowing up your software budget with per-seat pricing, you need platforms that treat external "Guests" or "Collaborators" as free additions.

The following tools offer granular permissions and external guest access without forcing you to buy a paid seat for every client:

• Asana
  • How guest access works: You can invite an unlimited number of external guests (clients, contractors) to specific projects or tasks. They do not consume a paid member license.
  • Granular permissions: You share only specific projects or portfolios with a client. Within those projects, you control whether they can comment, edit, or only view tasks. They cannot see any other internal projects or workspaces.[rock.so](https://www.rock.so/blog/asana-pricing)
• ClickUp
  • How guest access works: ClickUp allows external guests on both free and paid plans without charging extra for view-only or basic collaborative interaction.
  • Granular permissions: You can invite guests to individual Folders, Lists, Tasks, or Dashboards. You can restrict them so they only see items explicitly shared with them. (Note: Highly granular permission-controlling of what guests can edit/see down to custom fields generally requires their paid tiers, but basic view-only sharing is free). [rock.so](https://help.clickup.com/hc/en-us/articles/6310022323991-Guest-type-user-roles)[[2](https://help.clickup.com/hc/en-us/articles/6310022323991-Guest-type-user-roles)](https://help.clickup.com/hc/en-us/articles/26173894257047-User-role-availability-and-limits)
• Slack
  • How guest access works: Slack features Single-Channel and Multi-Channel Guests . Single-channel guests can be added to communicate and view files in just one specific project channel with a client, completely free of charge on enterprise/paid frameworks (though you should check current plan minimum requirements for guest provisioning).
  • Granular permissions: Clients only see the exact channels they are explicitly invited to. They have zero visibility into your other channels, direct messages, or internal company workspace directories.
• Microsoft Teams
  • How guest access works: If you already use Microsoft 365, Guest Access is built-in and free for external users. Guests sign in using their own email credentials (Microsoft or non-Microsoft).
  • Granular permissions: You can isolate a client to a single Team or specific channel. For ultra-granular file permissions (e.g., making a specific client folder read-only while your team edits), you manage the backend permissions directly through SharePoint , which mirrors over to the Teams interface.
• Softr (Builder approach)
  • How guest access works: If standard project management tools feel too messy for clients, Softr lets you build a custom-branded client portal on top of an Airtable or Google Sheets database for free/low cost.
  • Granular permissions: It features robust, built-in user authentication and granular page-level and data-level permissions, meaning Client A will dynamically only see rows/records in the database assigned specifically to their login ID.[rock.so](https://www.clinked.com/blog/best-free-client-portals-for-creating-your-own-portal)[[2](https://help.clickup.com/hc/en-us/articles/6310022323991-Guest-type-user-roles)](https://www.softr.io/blog/best-free-client-portal-software)

To help narrow down the best fit, tell me:

• What is the primary thing your clients need to do (view dashboards, chat in real time, review/approve files, or fill out forms)?
• Are you already paying for a parent ecosystem (like Microsoft 365 or Google Workspace) that you want to leverage?

If your main requirement is client access + granular permissions + avoiding paid seats for clients, the strongest options I’d shortlist are:

1. Asana — best for straightforward client portals

Asana explicitly treats external clients as guests, and guests don't count toward your paid seat limit. You can share an individual task, project, team, or portfolio, and guests only see what you've explicitly given them access to.Asana Help Center+1

Paid Starter currently includes unlimited free guests, while Advanced adds controls over who can invite guests.Asana

Best if: you want each client to have access to their own projects without worrying about client-seat charges.

2. ClickUp — best for granular permissions

ClickUp is more sophisticated on permissions. You can give clients view, comment, edit, or full-edit permissions at the item/location level. Guests only get access to things explicitly shared with them.ClickUp Help+1

The catch is that permission-controlled guests have a limited included allowance on paid plans. For example, the Unlimited plan starts with 5 permission-controlled guest seats for a one-member workspace and adds 2 for each additional member. Exceeding that allowance can trigger an additional paid member seat. Read-only guests are unlimited.ClickUp Help+1

Best if: you need clients to collaborate—not merely view—and you want very precise access controls.

3. monday.com — workable, but watch guest billing

monday.com's guests are designed specifically for external clients/vendors. On Standard, up to 3 guests are free, but every group of 4 guests consumes a billed seat. Pro and Enterprise allow unlimited guests.Monday Support+1

The free plan doesn't support guests at all.Monday Support

Best if: you already like monday.com's workflow and have relatively few clients.

My recommendation

If your requirement is specifically:

"I need to give lots of clients access to their own projects, with clients unable to see other clients' information, and I don't want to buy a seat for every client." I'd choose Asana first.

If your requirement is:

"I need very granular permissions—Client A can edit these things, comment on these, and only view these." I'd choose ClickUp, provided its included permission-controlled guest allowance fits your client count.

If you tell me how many internal employees you have, how many clients you need to invite, and whether clients need view/comment/edit access, I can compare the actual plans and likely cost for your setup.