head to head · open source
one-api vs schemathesis
one-api has 37,316 GitHub stars, 6,887 forks, 1,036 open issues and last shipped 10 months ago. schemathesis has 3,738 stars, 231 forks, 7 open issues and last shipped yesterday. one-api leads on adoption by 898% (37,316 vs 3,738 stars). one-api is written in JavaScript under MIT; schemathesis is written in Python under MIT. one-api has attracted 18% as many forks as stars, schemathesis 6%. schemathesis 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 | schemathesis | |
|---|---|---|
| GitHub stars | ★ 37K | ★ 3.7K |
| License | MIT | MIT |
| Written in | JavaScript | Python |
| Last push | 2026-01-09 | 2026-11-02 |
| Forks | ⑂ 6.9K | ⑂ 231 |
| 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 schemathesis if
- You want the schemathesis feature set and don't need the biggest community
- You prefer the MIT license terms
- Your stack matches Python
- You evaluated both and schemathesis fits your workflow better
About one-api
中文 English 日本語 One API ✨ 通过标准的 OpenAI API 格式访问所有的大模型，开箱即用 ✨ 部署教程 · 使用方法 · 意见反馈 · 截图展示 · 在线演示 · 常见问题 · 相关项目 · 赞赏支持 [!NOTE] 本项目为开源项目，使用者必须在遵循 OpenAI 的使用条款以及 法律法规 的情况下使用，不得用于非法用途。 根据《生成式人工智能服务管理暂行办法》的要求，请勿对中国地区公众提供一切未经备案的生成式人工智能服务。 [!NOTE] 稳定版 / 预览版镜像地址：justsong/one api 或者 ghcr.io/songquanpeng/one api alpha 版镜像地址：justsong/one api alpha 或者 ghcr.io/songquanpeng/one api alpha [!WARNING] 使用 root 用户初次登录系统后，务必修改默认密码 123456 ！ 功能 1. 支持多种大模型： + [x] OpenAI ChatGPT 系列模型（支持 Azure OpenAI API） + [x] Anthropic Claude 系列模型 (支持 AWS Claude) + [x] Google PaLM2/Gemini 系列模型 + [x] Mistral 系列模型 + [x] 字节跳动豆包大模型（火山引擎） + [x] 百度文心一言系列模型 +…
read the full one-api overview →
About schemathesis
Schemathesis Catch API bugs before your users do. Schemathesis tests OpenAPI and GraphQL APIs by generating inputs from your schema, adapting to server responses, and chaining operations into realistic workflows. Finding bugs that manual testing missed Try it now What problems does it solve? 💥 500 errors that crash your API on edge case inputs 📋 Schema violations where your API returns different data than documented 🚪 Validation bypasses where invalid data gets accepted 🔗 Integration failures when responses don't match client expectations 🔄 Stateful bugs where operations work individually but fail in…
read the full schemathesis overview →
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Frequently asked questions
Is one-api or schemathesis more popular?
one-api has 37,316 GitHub stars and schemathesis has 3,738. one-api has the larger community by that measure.
Are one-api and schemathesis free?
Both are open source. one-api is licensed under MIT and schemathesis under MIT. Neither carries a licence fee.
What is the difference between one-api and schemathesis?
one-api is written in JavaScript and schemathesis in Python. 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 schemathesis?
Choose one-api if you want the larger community (37,316 stars) or its MIT licence terms. Choose schemathesis if its feature set, stack or MIT licence fits better. Both are self-hostable.