head to head · open source
Open WebUI vs FastGPT
Open WebUI has 157,575 GitHub stars, 22,923 forks, 294 open issues and last shipped yesterday. FastGPT has 29,978 stars, 7,363 forks, 172 open issues and last shipped yesterday. Open WebUI leads on adoption by 426% (157,575 vs 29,978 stars). Open WebUI is written in Python under a custom or non-standard licence; FastGPT is written in TypeScript under a custom or non-standard licence. Open WebUI has attracted 15% as many forks as stars, FastGPT 25%. FastGPT was the more recently maintained of the two, and both are self-hostable with no licence fee. The two share 4 topic tags (llm, mcp, openai, rag), 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
| Open WebUI | FastGPT | |
|---|---|---|
| GitHub stars | ★ 158K | ★ 30K |
| License | Custom / other | Custom / other |
| Written in | Python | TypeScript |
| Last push | 2026-11-02 | 2026-11-02 |
| Forks | ⑂ 23K | ⑂ 7.4K |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick Open WebUI if
- You weight community size — 158K stars and counting
- You want the Custom / other license terms
- Your stack matches Python
- You value the larger contributor base for long-term maintenance
pick FastGPT if
- You want the FastGPT feature set and don't need the biggest community
- You prefer the Custom / other license terms
- Your stack matches TypeScript
- You evaluated both and FastGPT fits your workflow better
About Open WebUI
Open WebUI 👋 Open WebUI is a home for AI , a self hosted AI platform that's extensible , feature rich , user friendly, and built to run entirely offline . With support for Ollama and OpenAI compatible APIs , it gives you a powerful, provider agnostic interface for both local and cloud based models. Passionate about open source AI? Join our team → [!TIP] Looking for an Enterprise Plan? – Speak with Our Sales Team Today! For more information, be sure to check out our Open WebUI Documentation. Key Features of Open WebUI ⭐ 🚀 Effortless Setup : Install seamlessly via pip, uv, Docker, or Kubernetes (kubectl…
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About FastGPT
FastGPT English 简体中文 Bahasa Indonesia ไทย Tiếng Việt 日本語 FastGPT 是一个 AI Agent 构建平台，提供开箱即用的数据处理、模型调用等能力，同时可以通过 Flow 可视化进行工作流编排，从而实现复杂的应用场景。 快速开始 可以通过 Docker 快速启动 FastGPT，在终端输入以下命令，根据引导完成输入即可拉取配置。 bash 输入命令拉取配置文件 bash 💪 我们的项目 & 链接 快速开始本地开发 OpenAPI 文档 FastGPT plugin AI Proxy: 模型聚合负载均衡服务 Sealos：快速部署集群应用 🌿 第三方生态 AI Proxy：大模型聚合服务 SiliconCloud (硅基流动) —— 开源模型在线体验平台 🏘️ 社区交流群 扫码加入飞书话题群： 🤝 贡献者 我们非常欢迎各种形式的贡献。如果你对贡献代码感兴趣，可以查看我们的 GitHub Issues，大展身手，向我们展示你的奇思妙想。 🌟 Star History 使用协议 本仓库遵循 FastGPT Open Source License 开源协议。 1. 允许作为后台服务直接商用，但不允许提供 SaaS 服务。 2. 未经商业授权，任何形式的商用服务均需保留相关版权信息。 3. 完整请查看 FastGPT Open Source License 4…
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Frequently asked questions
Is Open WebUI or FastGPT more popular?
Open WebUI has 157,575 GitHub stars and FastGPT has 29,978. Open WebUI has the larger community by that measure.
Are Open WebUI and FastGPT free?
Neither Open WebUI nor FastGPT declares a licence in this registry, so check each project's own repository before relying on either for a commercial use. Both are free to self-host.
What is the difference between Open WebUI and FastGPT?
Open WebUI is written in Python and FastGPT 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, Open WebUI or FastGPT?
Choose Open WebUI if you want the larger community (157,575 stars) or its Custom / other licence terms. Choose FastGPT if its feature set, stack or Custom / other licence fits better. Both are self-hostable.