head to head · open source
Jan vs FastGPT
Jan has 45,409 GitHub stars, 3,145 forks, 521 open issues and last shipped yesterday. FastGPT has 29,987 stars, 7,367 forks, 172 open issues and last shipped yesterday. Jan leads on adoption by 51% (45,409 vs 29,987 stars). Jan is written in Rust under a custom or non-standard licence; FastGPT is written in TypeScript under a custom or non-standard licence. Jan has attracted 7% as many forks as stars, FastGPT 25%. Jan was the more recently maintained of the two, and both are self-hostable with no licence fee. The two share 1 topic tag (llm), 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.
← all 20902 open source comparisons
Side by side
| Jan | FastGPT | |
|---|---|---|
| GitHub stars | ★ 45K | ★ 30K |
| License | Custom / other | Custom / other |
| Written in | Rust | TypeScript |
| Last push | 2026-11-04 | 2026-11-04 |
| Forks | ⑂ 3.1K | ⑂ 7.4K |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick Jan if
- You weight community size — 45K stars and counting
- You want the Custom / other license terms
- Your stack matches Rust
- 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 Jan
Jan Open source ChatGPT replacement English · 中文 · 日本語 Getting Started Community Changelog Bug reports Jan is bringing the best of open source AI in an easy to use product. Download and run LLMs with full control and privacy . Installation The easiest way to get started is by downloading one of the following versions for your respective operating system: Platform Download Windows jan.exe macOS jan.dmg Linux (deb) jan.deb Linux (AppImage) jan.AppImage Linux (Arm64) How to Download from jan.ai or GitHub Releases. Features Local AI Models : Download and run LLMs (Llama, Gemma, Qwen, GPT oss etc.) from HuggingFace…
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…
read the full FastGPT overview →
More in AI & Machine Learning
Related comparisons
More AI Interaction & Interfaces projects
Compare either of these against the rest of the AI Interaction & Interfaces field.
Frequently asked questions
Is Jan or FastGPT more popular?
Jan has 45,409 GitHub stars and FastGPT has 29,987. Jan has the larger community by that measure.
Are Jan and FastGPT free?
Neither Jan 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 Jan and FastGPT?
Jan is written in Rust 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, Jan or FastGPT?
Choose Jan if you want the larger community (45,409 stars) or its Custom / other licence terms. Choose FastGPT if its feature set, stack or Custom / other licence fits better. Both are self-hostable.