head to head · open source
one-api vs zod-to-openapi
one-api has 37,316 GitHub stars, 6,887 forks, 1,036 open issues and last shipped 10 months ago. zod-to-openapi has 1,635 stars, 107 forks, 39 open issues and last shipped 1 months ago. one-api leads on adoption by 2,182% (37,316 vs 1,635 stars). one-api is written in JavaScript under MIT; zod-to-openapi is written in TypeScript under MIT. one-api has attracted 18% as many forks as stars, zod-to-openapi 7%. zod-to-openapi was the more recently maintained of the two, and both are self-hostable with no licence fee.
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 | zod-to-openapi | |
|---|---|---|
| GitHub stars | ★ 37K | ★ 1.6K |
| License | MIT | MIT |
| Written in | JavaScript | TypeScript |
| Last push | 2026-01-09 | 2026-10-02 |
| Forks | ⑂ 6.9K | ⑂ 107 |
| 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 zod-to-openapi if
- You want the zod-to-openapi feature set and don't need the biggest community
- You prefer the MIT license terms
- Your stack matches TypeScript
- You evaluated both and zod-to-openapi 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 zod-to-openapi
Zod to OpenAPI [!IMPORTANT] For Zod v3 support, please use the v7.3.4 version. However keep in mind that we do not intend to actively support that version going forward Install with: npm install @asteasolutions/zod to openapi@7.3.4 A library that uses zod schemas to generate an Open API Swagger documentation. 1. Purpose and quick example 2. Usage 1. Installation 2. The openapi method 3. The Registry 4. The Generator 5. Defining schemas 6. Defining routes & webhooks 7. Defining custom components 8. A full example 9. Adding it as part of your build 10. Using schemas vs a registry 11. Generation options 3. Zod…
read the full zod-to-openapi overview →
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Frequently asked questions
Is one-api or zod-to-openapi more popular?
one-api has 37,316 GitHub stars and zod-to-openapi has 1,635. one-api has the larger community by that measure.
Are one-api and zod-to-openapi free?
Both are open source. one-api is licensed under MIT and zod-to-openapi under MIT. Neither carries a licence fee.
What is the difference between one-api and zod-to-openapi?
one-api is written in JavaScript and zod-to-openapi 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 zod-to-openapi?
Choose one-api if you want the larger community (37,316 stars) or its MIT licence terms. Choose zod-to-openapi if its feature set, stack or MIT licence fits better. Both are self-hostable.