head to head · open source
Insomnia vs WindsurfAPI
Insomnia has 40,111 GitHub stars, 2,388 forks, 874 open issues and last shipped yesterday. WindsurfAPI has 3,121 stars, 636 forks, 7 open issues and last shipped 2 days ago. Insomnia leads on adoption by 1,185% (40,111 vs 3,121 stars). Insomnia is written in TypeScript under Apache-2.0; WindsurfAPI is written in JavaScript under MIT. Insomnia has attracted 6% as many forks as stars, WindsurfAPI 20%. Insomnia 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
| Insomnia | WindsurfAPI | |
|---|---|---|
| GitHub stars | ★ 40K | ★ 3.1K |
| License | Apache-2.0 | MIT |
| Written in | TypeScript | JavaScript |
| Last push | 2026-11-02 | 2026-11-01 |
| Forks | ⑂ 2.4K | ⑂ 636 |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick Insomnia if
- You weight community size — 40K stars and counting
- You want the Apache-2.0 license terms
- Your stack matches TypeScript
- You value the larger contributor base for long-term maintenance
pick WindsurfAPI if
- You want the WindsurfAPI feature set and don't need the biggest community
- You prefer the MIT license terms
- Your stack matches JavaScript
- You evaluated both and WindsurfAPI fits your workflow better
About Insomnia
Insomnia API Client Insomnia is an open source, cross platform API client for GraphQL, REST, WebSockets, Server Sent Events (SSE), gRPC and any other HTTP compatible protocol. With Insomnia you can: Debug APIs using the most popular protocols and formats. Design APIs using the native OpenAPI editor and visual preview. Test APIs using native test suites and collection runner. Mock APIs using a cloud or self hosted mocking server. Build CI/CD pipelines using the native Insomnia CLI for linting and testing. Collaborate with others using the many collaboration features. And more including the ability to use 3rd…
read the full Insomnia overview →
About WindsurfAPI
WindsurfAPI · DevinAPI 把 Windsurf / Devin 的 100+ AI 模型（Claude、GPT、Gemini、DeepSeek、Kimi、GLM、SWE…）变成 OpenAI Chat / Responses / Anthropic / Gemini 四套标准 API。零 npm 运行时依赖。 历史账本 · 把 1387 次提交、196 个版本、82 个 PR、180 个 issue 摊开给你看：时间线主账 + 贡献者分析 + Git 树三形态（竖/横/环）+ 自伤与返工全记录 —— 打开可视化账本 （纯原生渲染，零依赖） · English 声明 没点 Star 和 Follow 的 ：严禁商业使用、转售、代部署、挂后台对外提供服务、包装成中转服务出售。 点了 Star 和 Follow 的 ：随便用，我睁一只眼闭一只眼。 代码本体按 MIT License 开源（见 LICENSE），上面这段是作者个人态度。 把 Windsurf（原 Codeium，现 Devin Desktop）的 AI 模型变成 四套标准 API 同时兼容 ： POST /v1/chat/completions — OpenAI 兼容 任何 OpenAI SDK 直接用 POST /v1/completions — OpenAI 旧 Completions （非流式； prompt 包成一条 user…
read the full WindsurfAPI overview →
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Frequently asked questions
Is Insomnia or WindsurfAPI more popular?
Insomnia has 40,111 GitHub stars and WindsurfAPI has 3,121. Insomnia has the larger community by that measure.
Are Insomnia and WindsurfAPI free?
Both are open source. Insomnia is licensed under Apache-2.0 and WindsurfAPI under MIT. Neither carries a licence fee.
What is the difference between Insomnia and WindsurfAPI?
Insomnia is written in TypeScript and WindsurfAPI 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, Insomnia or WindsurfAPI?
Choose Insomnia if you want the larger community (40,111 stars) or its Apache-2.0 licence terms. Choose WindsurfAPI if its feature set, stack or MIT licence fits better. Both are self-hostable.