Apidog vs Fern
Apidog and Fern are both API & developer docs tools. Apidog is aimed at developers and small businesses, while Fern is aimed at developers. Both have a free plan.
All-in-one API design, testing, mocking and docs; a Postman rival
SDKs and docs generated from your API spec
| Pricing | Freemium · $12 | Freemium |
| Starting price | $12/mo | Not published |
| Free plan | Yes | Yes |
| Free trial | 14 days | — |
| Built for | Developers, Small businesses, Enterprise | Developers |
| Platforms | web, macos, windows, linux | web |
| Country | — | US · 2022 |
| Rating | — | — |
Choose Apidog if
Small and mid-size engineering teams that want one spec-first tool for API design, debugging, testing, mocking and docs at a lower per-seat cost than Postman.
- Replaces several tools with one spec-first workspace
- Free for up to four users; paid seats cost less than Postman
- Imports Postman, Insomnia, OpenAPI, HAR, cURL and WSDL
Look elsewhere if: Companies whose main need is a polished public developer portal or strict design governance (ReadMe, Mintlify, Stoplight).
Choose Fern if
API-first companies.
- Saves SDK engineering
- Idiomatic code
- Docs included
Look elsewhere if: Small internal APIs.
Apidog vs Fern pricing
Apidog
- Free$0Up to 4 users; design, debug, test, mock and docs
- Basic$12/user/mo$9/user/mo billed annually; 3 custom domains
- Professional$24/user/mo$18/user/mo billed annually; unlimited change history
- Enterprise$27/user/moBilled annually; SSO, organizations; on-prem separately
Fern
- Free$010 team members, 1,000 pages, custom domain
- EnterpriseCustomSSO, SCIM, RBAC, self-hosting, SLA
Apidog · Key features
- Visual OpenAPI and JSON Schema designer with change history
- Request client for HTTP, GraphQL, gRPC, WebSocket, SOAP and SSE
- Postman-compatible pre and post scripts and database connections
- Visual test scenarios, scheduled runs and performance testing
- Schema-driven smart mocks, cloud mock and self-hosted runner mock
- Interactive API docs with custom domains and free readers
Cons
- Interface is dense and takes time for non-technical users
- Public docs portals are less polished than ReadMe or Mintlify
- Smaller community and plugin ecosystem than Postman
Fern · Key features
- SDK generation (TS, Python, Java, Go)
- Docs generation
- API definition
- CI publishing
- Versioning
- Examples
Cons
- Enterprise pricing is custom
- Spec quality required
- Vendor dependence
Apidog vs Fern: FAQ
Do Apidog and Fern have a free plan?
Yes, both Apidog and Fern have a free plan; paid plans add more usage and features.
Which is better for small businesses, Apidog or Fern?
Apidog lists small businesses as a core audience, while Fern is aimed more at developers.