Fern review

Fern offers the most generous free plan in this comparison for teams publishing API docs. The Free plan covers 10 team members, 1,000 pages, 2,000 page generations a month, a custom domain and subpath, guides, API references and changelogs, an API explorer, a web editor, version and product switching, and Ask Fern, Fern Agent and an MCP server with 250 AI credits a month. It reads OpenAPI, OpenAPI Overlays, Arazzo, AsyncAPI, gRPC, GraphQL and OpenRPC. Fern also generates SDKs, and its site states that Fern is a Postman company. The catch is the jump from Free to Enterprise: there is no published middle plan, so custom CSS, JavaScript and React components, multiple repos, advanced analytics, SSO, SCIM and RBAC all need a sales conversation. Teams that want a priced upgrade path should compare Mintlify or Scalar.

Who it is for

Teams that want a free docs site with a custom domain and 10 members

Price

Free plan; Enterprise pricing on request.

Free $ 0 /mo Free forever
Quoted from the vendor pricing page on November 12, 2026.

Key features

• Free plan covers 10 team members and 1,000 pages
• Custom domain and subpath on the free plan
• Guides, API references and changelogs with an API explorer and web editor
• Ask Fern, Fern Agent and an MCP server, with 250 AI credits a month
• Supports OpenAPI, AsyncAPI, gRPC, GraphQL and OpenRPC

Strengths and weaknesses

• Strength: Free plan includes a custom domain and subpath hosting
• Strength: Version and product switching on the free plan
• Strength: Docs-as-code workflow with Markdown guides
• Weakness: No published paid tier between Free and custom Enterprise
• Weakness: Custom CSS, JavaScript and React components need Enterprise
• Weakness: SSO and RBAC are Enterprise only

Key facts

• Free plan: Yes, 10 members and 1,000 pages
• Paid plans: Enterprise, custom pricing
• AI credits: 250 per month on Free
• Owner: Fern is a Postman company

Where it ranks

Fern is No. 4 in our Best API Documentation Tools verdict.