head to head · open source
fastapi vs redocly-cli
fastapi has 102,428 GitHub stars, 9,909 forks, 78 open issues and last shipped 5 days ago. redocly-cli has 1,510 stars, 228 forks, 166 open issues and last shipped yesterday. fastapi leads on adoption by 6,683% (102,428 vs 1,510 stars). fastapi is written in Python under MIT; redocly-cli is written in TypeScript under MIT. fastapi has attracted 10% as many forks as stars, redocly-cli 15%. redocly-cli was the more recently maintained of the two, and both are self-hostable with no licence fee. The two share 2 topic tags (openapi, openapi3), so they are genuine substitutes rather than adjacent tools.
Two open source projects, one decision. Both are free and self-hostable — the differences are community size, license terms, language stack and release pace.
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Side by side
| fastapi | redocly-cli | |
|---|---|---|
| GitHub stars | ★ 102K | ★ 1.5K |
| License | MIT | MIT |
| Written in | Python | TypeScript |
| Last push | 2026-09-14 | 2026-09-18 |
| Forks | ⑂ 9.9K | ⑂ 228 |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick fastapi if
- You weight community size — 102K stars and counting
- You want the MIT license terms
- Your stack matches Python
- You value the larger contributor base for long-term maintenance
pick redocly-cli if
- You want the redocly-cli feature set and don't need the biggest community
- You prefer the MIT license terms
- Your stack matches TypeScript
- You evaluated both and redocly-cli fits your workflow better
About fastapi
FastAPI is an MIT licensed, high performance Python web framework for building APIs with standard Python type hints, aimed at Python developers and teams that need production ready HTTP services with automatic OpenAPI documentation.
read the full fastapi overview →
About redocly-cli
Redocly CLI is a TypeScript, MIT licensed command line toolset that lints, bundles, validates, tests, and renders OpenAPI, AsyncAPI, and Arazzo descriptions, built for API designers, platform teams, and CI pipelines that need API governance and reference documentation without adopting a hosted service.
read the full redocly-cli overview →
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Frequently asked questions
Is fastapi or redocly-cli more popular?
fastapi has 102,428 GitHub stars and redocly-cli has 1,510. fastapi has the larger community by that measure.
Are fastapi and redocly-cli free?
Both are open source. fastapi is licensed under MIT and redocly-cli under MIT. Neither carries a licence fee.
What is the difference between fastapi and redocly-cli?
fastapi is written in Python and redocly-cli in TypeScript. The practical differences are community size, licence terms, language stack and release cadence — all compared in the table above.
Which should I choose, fastapi or redocly-cli?
Choose fastapi if you want the larger community (102,428 stars) or its MIT licence terms. Choose redocly-cli if its feature set, stack or MIT licence fits better. Both are self-hostable.