head to head · open source
one-api vs lambda-api
one-api has 36,940 GitHub stars, 6,867 forks, 1,036 open issues and last shipped 8 months ago. lambda-api has 1,469 stars, 127 forks, 44 open issues and last shipped 5 days ago. one-api leads on adoption by 2,415% (36,940 vs 1,469 stars). one-api is written in JavaScript under MIT; lambda-api is written in JavaScript under MIT. one-api has attracted 19% as many forks as stars, lambda-api 9%. lambda-api was the more recently maintained of the two, and both are self-hostable with no licence fee. The two share 2 topic tags (api, api-gateway), 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.
← all 8884 open source comparisons
Side by side
| one-api | lambda-api | |
|---|---|---|
| GitHub stars | ★ 37K | ★ 1.5K |
| License | MIT | MIT |
| Written in | JavaScript | JavaScript |
| Last push | 2026-01-09 | 2026-09-13 |
| Forks | ⑂ 6.9K | ⑂ 127 |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick one-api if
- You weight community size — 37K stars and counting
- You want the MIT license terms
- Your stack matches JavaScript
- You value the larger contributor base for long-term maintenance
pick lambda-api if
- You want the lambda-api feature set and don't need the biggest community
- You prefer the MIT license terms
- Your stack matches JavaScript
- You evaluated both and lambda-api fits your workflow better
About one-api
One API is a self hosted LLM API management and key redistribution system that exposes many model providers through the standard OpenAI API format, aimed at developers, teams and operators who want a single endpoint, a single key model and a single quota surface across providers.
read the full one-api overview →
About lambda-api
Lightweight web framework for your serverless applications Lambda API is a lightweight web framework for AWS Lambda using AWS API Gateway Lambda Proxy Integration or ALB Lambda Target Support. This closely mirrors (and is based on) other web frameworks like Express.js and Fastify, but is significantly stripped down to maximize performance with Lambda's stateless, single run executions. Using AWS SDK v2? lambda api@v1 is using AWS SDK v3. If you are using AWS SDK v2, please use lambda [email protected]. Simple Example For a full tutorial see How To: Build a Serverless API with Serverless, AWS Lambda and Lambda API. Why …
read the full lambda-api overview →
More in Developer Tools
Related comparisons
More API Development & Testing projects
Compare either of these against the rest of the API Development & Testing field.
Frequently asked questions
Is one-api or lambda-api more popular?
one-api has 36,940 GitHub stars and lambda-api has 1,469. one-api has the larger community by that measure.
Are one-api and lambda-api free?
Both are open source. one-api is licensed under MIT and lambda-api under MIT. Neither carries a licence fee.
What is the difference between one-api and lambda-api?
one-api is written in JavaScript and lambda-api 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, one-api or lambda-api?
Choose one-api if you want the larger community (36,940 stars) or its MIT licence terms. Choose lambda-api if its feature set, stack or MIT licence fits better. Both are self-hostable.