head to head · open source
faiss vs Olares
faiss has 41,256 GitHub stars, 4,586 forks, 327 open issues and last shipped 2 days ago. Olares has 5,339 stars, 331 forks, 155 open issues and last shipped 2 days ago. faiss leads on adoption by 673% (41,256 vs 5,339 stars). faiss is written in C++ under MIT; Olares is written in Go under AGPL-3.0. faiss has attracted 11% as many forks as stars, Olares 6%. faiss 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 | Olares | |
|---|---|---|
| GitHub stars | ★ 41K | ★ 5.3K |
| License | MIT | AGPL-3.0 |
| Written in | C++ | Go |
| Last push | 2026-11-03 | 2026-11-03 |
| Forks | ⑂ 4.6K | ⑂ 331 |
| 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 Olares if
- You want the Olares feature set and don't need the biggest community
- You prefer the AGPL-3.0 license terms
- Your stack matches Go
- You evaluated both and Olares fits your workflow better
About faiss
Faiss Faiss is a library for efficient similarity search and clustering of dense vectors. It contains algorithms that search in sets of vectors of any size, up to ones that possibly do not fit in RAM. It also contains supporting code for evaluation and parameter tuning. Faiss is written in C++ with complete wrappers for Python/numpy. Some of the most useful algorithms are implemented on the GPU. It is developed primarily at Meta's Fundamental AI Research group. News See CHANGELOG.md for detailed information about latest features. Introduction Faiss contains several methods for similarity search. It assumes that…
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About Olares
Olares Your AI Agent. Your Data. Your Hardware. Install Olares · Manage Olares with AI · Contribute Olares is an open source personal cloud OS you operate in plain language, built to run AI agents and LLMs on hardware you own. Powered by Kubernetes, it turns your machines into a self hosted AI platform accessible from any browser, giving everyone from individual users to small teams a unified place for compute, storage, networking, and apps. 🌟 If Olares is useful to you, consider giving the project a star. Your support encourages us to keep improving it. Why Olares Great AI needs to know you. That requires…
read the full Olares overview →
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Frequently asked questions
Is faiss or Olares more popular?
faiss has 41,256 GitHub stars and Olares has 5,339. faiss has the larger community by that measure.
Are faiss and Olares free?
Both are open source. faiss is licensed under MIT and Olares under AGPL-3.0. Neither carries a licence fee.
What is the difference between faiss and Olares?
faiss is written in C++ and Olares in Go. 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 Olares?
Choose faiss if you want the larger community (41,256 stars) or its MIT licence terms. Choose Olares if its feature set, stack or AGPL-3.0 licence fits better. Both are self-hostable.