head to head · open source
fastapi vs aws-lambda-fastify
fastapi has 102,409 GitHub stars, 9,906 forks, 78 open issues and last shipped 5 days ago. aws-lambda-fastify has 560 stars, 37 forks, 5 open issues and last shipped 2 months ago. fastapi leads on adoption by 18,187% (102,409 vs 560 stars). fastapi is written in Python under MIT; aws-lambda-fastify is written in JavaScript under MIT. fastapi has attracted 10% as many forks as stars, aws-lambda-fastify 7%. fastapi was the more recently maintained of the two, and both are self-hostable with no licence fee. The two share 1 topic tag (api), 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 | aws-lambda-fastify | |
|---|---|---|
| GitHub stars | ★ 102K | ★ 560 |
| License | MIT | MIT |
| Written in | Python | JavaScript |
| Last push | 2026-09-14 | 2026-08-04 |
| Forks | ⑂ 9.9K | ⑂ 37 |
| 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 aws-lambda-fastify if
- You want the aws-lambda-fastify feature set and don't need the biggest community
- You prefer the MIT license terms
- Your stack matches JavaScript
- You evaluated both and aws-lambda-fastify 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 aws-lambda-fastify
aws lambda fastify is an MIT licensed JavaScript library that runs a Fastify application as an AWS Lambda handler behind API Gateway or an Application Load Balancer, built for Node.js teams that already write HTTP APIs with Fastify and want to deploy them serverless without rewriting their routes.
read the full aws-lambda-fastify overview →
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Frequently asked questions
Is fastapi or aws-lambda-fastify more popular?
fastapi has 102,409 GitHub stars and aws-lambda-fastify has 560. fastapi has the larger community by that measure.
Are fastapi and aws-lambda-fastify free?
Both are open source. fastapi is licensed under MIT and aws-lambda-fastify under MIT. Neither carries a licence fee.
What is the difference between fastapi and aws-lambda-fastify?
fastapi is written in Python and aws-lambda-fastify in JavaScript. 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 aws-lambda-fastify?
Choose fastapi if you want the larger community (102,409 stars) or its MIT licence terms. Choose aws-lambda-fastify if its feature set, stack or MIT licence fits better. Both are self-hostable.