Fern review (2026): is the free plan enough?

API documentation sites and SDKs generated from an API spec

Free planDocs & WikisChecked Nov 13, 2026 · graded Nov 13, 2026 by ToolGPA

Fern report card

2.6GPA

Good · out of 4.0 · graded Nov 13, 2026

Best for API docs and SDKs from one spec

Fern builds docs sites from API definitions, with an explorer, a web editor and a free plan for 10 members and 1,000 pages. But there's no published mid-tier price, and SSO, custom CSS and JavaScript, and self-hosting all need a sales call for Enterprise.

Who Fern is for

Fits if you maintain an OpenAPI spec and want a hosted docs site at no cost to start
Works for small API teams that want an API explorer and a custom domain on the free plan

Who Fern is not for

Skip it if you need SSO or SCIM, which are Enterprise only
Tight if you outgrow 1 site, 1,000 pages or 10 members, as the next step is a sales quote
Not for you if you want to remove Fern branding or add custom CSS and JavaScript without Enterprise
Watch out: SDK pricing sits on a separate tab that this listing did not read

See the alternatives

Why Fern gets a 2.6

Five grades, each with its reason. The GPA is their average: an A is 4 points, an F is none.

BValue for moneyThe Free plan costs $0 and the only other plan is a sales quote. Free is in the cheapest group, but there is no published price in between.
BFree plan and trialFree plan with 10 members, 1 site, 1,000 pages and 2,000 page generations a month, which one small team could live on.
CFeaturesDocs from several API spec types, an explorer, a web editor and SDK generation. The listing shows gaps: SDK pricing was not read, and custom CSS, SSO and branding removal are Enterprise only.
CEase of useNo store rating on record. You point it at your API definitions or a repository, which takes some setup.
BPlatforms and integrationsWeb product that reads OpenAPI, AsyncAPI, GraphQL and gRPC, plus Postman. No desktop or phone app is named.

What these grades rest on. Graded from this listing, whose facts were read from Fern's own pages on 13 November 2026. Not based on using the product, and shorter than our full reviews. How we review and grade.

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<a href="https://toolgpa.com/tools/fern#review"><img src="https://toolgpa.com/badge/fern.svg" alt="Fern: 2.6 GPA on ToolGPA" width="196" height="56"></a>

Where Fern stands among docs and wiki tools

Fern's GPA of 2.6 is higher than 47 of the 86 other docs and wiki tools we grade, and level with 17.

It stands best on value for money (B, above 50 of 86) and worst on features (C, above 2).

Each grade against the category

Every bar is all 87 docs and wiki tools we grade, cut by the letter each got. Fern’s own letter is outlined.

BValue for money
Above 50 of 86, level with 9
BFree plan and trial
Above 41 of 86, level with 19
CFeatures
Above 2 of 86, level with 51
CEase of use
Above 25 of 86, level with 39
BPlatforms and integrations
Above 28 of 86, level with 54

Keep Fern, or make your own?

Keep it

To replace Fern you would be making a search engine with an AI model behind it. That is not a weekend's work, with an AI app builder or without one.

What you could make

Documents and Markdown: an app builder makes these well.

What you could not

A search engine with an AI model behind it.
It plugs into other products, OpenAPI, AsyncAPI and GraphQL among them, and has an API.

What this rests on. Fern’s listing: what it does, where it runs, what it plugs into and what it costs. It is a judgement about the kind of software this is. We have not built a replacement for it, and making your own means looking after it too. How we decide, and every tool’s verdict.

What is Fern?

Fern builds developer documentation sites from API definitions and Markdown guides, with an API explorer, a web editor and a changelog. It also generates SDKs, and its docs include AI search and an MCP server. The company's footer says Fern is a Postman company.

Worth knowing

Only two documentation plans are listed, Free and a sales-only Enterprise, so there is no published mid-tier price.
SSO, SCIM, custom CSS and JavaScript, removing Fern branding and self-hosting are Enterprise only.
The Free plan is limited to 1 site, 1,000 pages and 10 members.
SDK pricing was not read for this listing; the pricing page has a separate SDKs tab.

Key features

Docs from API specs: Supports OpenAPI, AsyncAPI, gRPC, GraphQL, OpenRPC and Arazzo, plus Markdown guides and changelogs.
API explorer: A try-it-out explorer with an option to fill in the visitor's API key.
Web editor and docs-as-code: Pages can be edited in a web editor or kept as files in a repository.
AI features: Ask Fern search, an AI writing agent, AI translations, an llms.txt file and an MCP server are on the pricing page.
SDK generation: Client libraries are generated from the same API definition; the SDK pricing is a separate tab.

Fern pricing

As of Nov 13, 2026, Fern has a free plan.

Starts at: Not published
Free plan: 10 team members, 1 site with up to 1,000 pages, 250 AI credits and 2,000 page generations per month, custom domain, API explorer and web editor.
Free trial: None listed

Plan	Price	What you get
Free	$0	10 members, 1,000 pages, 250 AI credits and 2,000 page generations per month, custom domain and subpath, API explorer, Ask Fern and MCP server.
Enterprise	Custom	Adds SSO, SCIM and advanced RBAC, multiple repos and docs sites, custom CSS, JavaScript and React, advanced analytics, self-hosting and an uptime SLA. Sold through sales.

Read from buildwithfern.com on Nov 13, 2026. Prices change, so confirm with Fern before you buy.

Pricing in detail