head to head · open source
faiss vs Agenta
faiss has 40,939 GitHub stars, 4,527 forks, 327 open issues and last shipped yesterday. Agenta has 4,766 stars, 674 forks, 309 open issues and last shipped today. faiss leads on adoption by 759% (40,939 vs 4,766 stars). faiss is written in C++ under MIT; Agenta is written in TypeScript under a custom or non-standard licence. faiss has attracted 11% as many forks as stars, Agenta 14%. Agenta 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
| faiss | Agenta | |
|---|---|---|
| GitHub stars | ★ 41K | ★ 4.8K |
| License | MIT | Custom / other |
| Written in | C++ | TypeScript |
| Last push | 2026-09-19 | 2026-09-20 |
| Forks | ⑂ 4.5K | ⑂ 674 |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick faiss if
- You weight community size — 41K stars and counting
- You want the MIT license terms
- Your stack matches C++
- You value the larger contributor base for long-term maintenance
pick Agenta if
- You want the Agenta feature set and don't need the biggest community
- You prefer the Custom / other license terms
- Your stack matches TypeScript
- You evaluated both and Agenta fits your workflow better
About faiss
Faiss is an MIT licensed C++ library for efficient similarity search and clustering of dense vectors, with complete Python and NumPy wrappers, developed primarily at Meta's Fundamental AI Research group, and it is intended for engineers and researchers who need nearest neighbour search over vector sets that range from small collections to sets that possibly do not fit in RAM.
read the full faiss overview →
About Agenta
Agenta is an open source workspace where a team builds, runs, and improves AI agents by chatting with them, intended for individuals and teams that want agent automation without moving every task onto metered API billing.
read the full Agenta overview →
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Frequently asked questions
Is faiss or Agenta more popular?
faiss has 40,939 GitHub stars and Agenta has 4,766. faiss has the larger community by that measure.
Are faiss and Agenta free?
Both are open source. faiss is licensed under MIT, and Agenta has no licence declared in this registry. Both are free to self-host.
What is the difference between faiss and Agenta?
faiss is written in C++ and Agenta 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, faiss or Agenta?
Choose faiss if you want the larger community (40,939 stars) or its MIT licence terms. Choose Agenta if its feature set, stack or Custom / other licence fits better. Both are self-hostable.