head to head · open source
fastapi vs agentgateway
fastapi has 102,402 GitHub stars, 9,903 forks, 78 open issues and last shipped 4 days ago. agentgateway has 4,895 stars, 853 forks, 258 open issues and last shipped yesterday. fastapi leads on adoption by 1,992% (102,402 vs 4,895 stars). fastapi is written in Python under MIT; agentgateway is written in Rust under Apache-2.0. fastapi has attracted 10% as many forks as stars, agentgateway 17%. agentgateway 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
| fastapi | agentgateway | |
|---|---|---|
| GitHub stars | ★ 102K | ★ 4.9K |
| License | MIT | Apache-2.0 |
| Written in | Python | Rust |
| Last push | 2026-09-14 | 2026-09-17 |
| Forks | ⑂ 9.9K | ⑂ 853 |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick fastapi if
- You weight community size — 102K stars and counting
- You want the MIT license terms
- Your stack matches Python
- You value the larger contributor base for long-term maintenance
pick agentgateway if
- You want the agentgateway feature set and don't need the biggest community
- You prefer the Apache-2.0 license terms
- Your stack matches Rust
- You evaluated both and agentgateway fits your workflow better
About fastapi
FastAPI is an MIT licensed, high performance Python web framework for building APIs with standard Python type hints, aimed at Python developers and teams that need production ready HTTP services with automatic OpenAPI documentation.
read the full fastapi overview →
About agentgateway
Agentgateway is an open source proxy written in Rust and licensed under Apache 2.0. It is a next generation agentic proxy for AI agents and MCP servers, and it operates inside the Developer Tools, API gateway, Kubernetes, service mesh, and AI gateway ecosystem. The project is built on the MCP and A2A protocols.
read the full agentgateway overview →
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Frequently asked questions
Is fastapi or agentgateway more popular?
fastapi has 102,402 GitHub stars and agentgateway has 4,895. fastapi has the larger community by that measure.
Are fastapi and agentgateway free?
Both are open source. fastapi is licensed under MIT and agentgateway under Apache-2.0. Neither carries a licence fee.
What is the difference between fastapi and agentgateway?
fastapi is written in Python and agentgateway in Rust. The practical differences are community size, licence terms, language stack and release cadence — all compared in the table above.
Which should I choose, fastapi or agentgateway?
Choose fastapi if you want the larger community (102,402 stars) or its MIT licence terms. Choose agentgateway if its feature set, stack or Apache-2.0 licence fits better. Both are self-hostable.