head to head · open source
one-api vs zenstack
one-api has 36,940 GitHub stars, 6,867 forks, 1,036 open issues and last shipped 8 months ago. zenstack has 2,945 stars, 156 forks, 182 open issues and last shipped 8 days ago. one-api leads on adoption by 1,154% (36,940 vs 2,945 stars). one-api is written in JavaScript under MIT; zenstack is written in TypeScript under MIT. one-api has attracted 19% as many forks as stars, zenstack 5%. zenstack 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
| one-api | zenstack | |
|---|---|---|
| GitHub stars | ★ 37K | ★ 2.9K |
| License | MIT | MIT |
| Written in | JavaScript | TypeScript |
| Last push | 2026-01-09 | 2026-09-10 |
| Forks | ⑂ 6.9K | ⑂ 156 |
| 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 zenstack if
- You want the zenstack feature set and don't need the biggest community
- You prefer the MIT license terms
- Your stack matches TypeScript
- You evaluated both and zenstack 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 zenstack
Modern Data Layer for TypeScript Apps What's ZenStack Read full documentation at 👉🏻 ZenStack is a TypeScript database toolkit for developing full stack or backend Node.js/Bun applications. It provides a unified data modeling and query solution with the following features: 🔧 Modern schema first ORM that's compatible with Prisma's schema and API 📊 Versatile API high level ORM queries + low level Kysely query builder 🔐 Built in access control and data validation 🚀 Advanced data modeling patterns like polymorphism 🧩 Designed for extensibility and flexibility ⚙️ Automatic CRUD web APIs with adapters for popular…
read the full zenstack overview →
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Frequently asked questions
Is one-api or zenstack more popular?
one-api has 36,940 GitHub stars and zenstack has 2,945. one-api has the larger community by that measure.
Are one-api and zenstack free?
Both are open source. one-api is licensed under MIT and zenstack under MIT. Neither carries a licence fee.
What is the difference between one-api and zenstack?
one-api is written in JavaScript and zenstack 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, one-api or zenstack?
Choose one-api if you want the larger community (36,940 stars) or its MIT licence terms. Choose zenstack if its feature set, stack or MIT licence fits better. Both are self-hostable.