toolgrep / Developer productivity / Fern
Alternatives to Fern
Fern: Docs, SDKs, and CLIs for your API. 8 products similar to Fern, compared on pricing, free tier, API, MCP server, SDK and open source. 8 of 8 have a free tier, 8 of 8 have an API, 8 of 8 offer an MCP server, 2 of 8 are open source.
- ReadMe
Developer-friendly API documentation platform
- GitBook
The knowledge layer for AI
- Mockfly
Hosted mock API generator for frontend teams
- Mintlify
Documentation platform for building, hosting, and maintaining self-updating docs for developers and AI agents.
- Firecrawl
Web data API for AI agents
- Postman
API engineering for your agents
- Clerk
Authentication and user management for applications
- Cline
Open-source AI coding agent with Plan/Act modes, MCP integration, and terminal-first workflows.
Side by side
| Product | Pricing | Free tier | API | MCP server | SDK | Open source |
|---|---|---|---|---|---|---|
| Fern | Freemium | yes | yes | yes | yes | — |
| ReadMe | Freemium · from $0 | yes | yes | yes | — | no |
| GitBook | Freemium | yes | yes | yes | no | no |
| Mockfly | Freemium | yes | yes | yes | no | no |
| Mintlify | Freemium | yes | yes | yes | — | no |
| Firecrawl | Freemium | yes | yes | yes | yes | yes |
| Postman | Freemium · from $9 | yes | yes | yes | yes | no |
| Clerk | Freemium | yes | yes | yes | yes | no |
| Cline | Freemium | yes | yes | yes | yes | yes |
Facts come from each product's own website, or from its verified owner when they have edited the listing. Each product page shows when it was last verified and how it was extracted. Similarity comes from the products' descriptions.
API
curl https://toolgrep.com/api/products/fern/alternatives