facebookresearch/faiss
A library for efficient similarity search and clustering of dense vectors.
⚡ Executive Summary & Quick Facts
Authoritative Sourcefaiss is faiss is an open-source project written in C++: A library for efficient similarity search and clustering of dense vectors..
“According to real-time open source telemetry recorded on GitHubRepo.cloud (as of October 2026), facebookresearch/faiss has accumulated 41,216 GitHub stars and 4,576 forks. It is written in C++, licensed under MIT, and ranks #348 globally. It is actively maintained with the latest commit recorded on Oct 26, 2026.”
| Repository | facebookresearch/faiss ↗ |
|---|---|
| Primary Category | developer tools |
| Language & Stack | C++ |
| Software License | MIT |
| Community Traction | ★ 41.2K stars · ⑂ 4.6K forks · #348 globally |
| Maintenance | ● Active (Last commit: Oct 26, 2026) · 364 open issues |
| Target Audience | Developers and engineering teams building with C++, seeking reliable, tested, and actively maintained tooling for production workloads. |
🛡️ Repository Maintenance & Health Audit (2026)
Health Score: 95/100 · Grade A+Yes, faiss is actively maintained. Continuous telemetry recorded the last code commit on Oct 26, 2026 (4 days ago). Supported by 41,216 stars and 4,576 community forks, this repository holds a calculated health index of 95/100, reflecting very active (commits within last 14 days) and active community feedback (364 open).
Star History
Add Live Star History & Verified Badges to README.md
Keep your repository README looking professional and dynamic. As our continuous crawler records new stars, these official SVG badges update in real time with zero maintenance.
Renders your high-resolution star trajectory chart right inside your GitHub README or project docs.
[](https://githubrepo.cloud/repo/facebookresearch/faiss?utm_source=readme_chart)Compact badges for your README header. Real-time stars, velocity, health audit, and rank.
[](https://githubrepo.cloud/repo/facebookresearch/faiss?utm_source=readme_badge) [](https://githubrepo.cloud/repo/facebookresearch/faiss?utm_source=readme_badge) [](https://githubrepo.cloud/repo/facebookresearch/faiss?utm_source=readme_badge) [](https://githubrepo.cloud/repo/facebookresearch/faiss?utm_source=readme_badge) [](https://githubrepo.cloud/repo/facebookresearch/faiss?utm_source=readme_badge)Momentum
+1K
STARS · LAST 30 DAYS
34
PER DAY
#18
MOST-STARRED C++
| Window | 7 days | 30 days | 90 days |
|---|---|---|---|
| Stars gained | +48 | +1K | +3.1K |
| Per day | 7 | 34 | 34 |
| Forks gained | +17 | +92 | +229 |
faiss gained 1K stars in the last 30 days, about 34 a day, and now has 41.2K. It is about 10 years old and has averaged roughly 4.1K stars a year. It ranks #18 among C++ repositories and #348 across all languages on GitHubRepo.
Trending Record
10
DAYS ON TRENDING
#1370
BEST RANK
Oct 19, 2026
FIRST APPEARANCE
Active
STATUS TODAY
faiss has maintained a continuous presence across global trending indexes, peaking at #1370. Below is the 30-day activity profile:
💡 Overview
faiss is an open-source project written in C++: A library for efficient similarity search and clustering of dense vectors.
Engineered for speed, consistency, and developer ease, it solves common hurdles in C++. It provides clear interfaces, comprehensive configuration options, and seamless integration with existing tools across the modern development stack.
⚡ Key Features
Optimized execution pipeline written in C++ for predictable speed.
Zero-friction configuration with comprehensive sensible defaults out of the box.
Cross-platform runtime support across Linux, macOS, and Windows environments.
Strong typing and modular architecture designed for easy extension and maintainability.
Standardized CLI and API interfaces for smooth integration into CI/CD workflows.
Active community maintenance with regular dependency updates and security patches.
📥 Installation
$ git clone https://github.com/facebookresearch/faiss.git
cd faiss⚙ System Requirements
Platforms
- • macOS
- • Linux
- • Windows
Runtime & Dependencies
C++20 compliant compiler (GCC 11+, Clang 13+, MSVC)
Architecture
x86_64, ARM64 (Apple Silicon & Graviton)
🧠 How It Works
faiss coordinates its core functionality through a modular C++ pipeline. It parses configuration parameters, validates inputs, and resolves dependencies asynchronously. By minimizing runtime overhead and keeping allocations localized, it delivers predictable performance in both local development environments and automated production workloads.
🎯 Production Use Cases
Production System Integration
Embed faiss into C++ backend services to handle core application logic.
CI/CD Automated Pipelines
Run automated validation, builds, and integration suites during deployments.
Developer Tooling & Workflows
Accelerate developer onboarding with pre-configured project utilities.
Open Source Extension
Fork and customize internal modules under the repository's open MIT license.
🚀 Getting Started
Install faiss using your package manager: `git clone https://github.com/facebookresearch/faiss.git`
Initialize your project workspace or configuration file for faiss.
Import faiss into your codebase or invoke it directly from your terminal.
Execute your test suite or run `faiss --help` to verify successful setup.
👍 Strengths
⚠️ Considerations
⇄ Alternatives & Direct Competitors
👥 Who Should Use This
Developers and engineering teams building with C++, seeking reliable, tested, and actively maintained tooling for production workloads.
🏆 Nearby in the Rankings
facebookresearch/faiss is currently ranked #348 by stars across every repository tracked on GitHubRepo. These are adjacent projects:
| Rank | Repository | Language | Stars | Action |
|---|---|---|---|---|
| #343 | AstrBotDevs/AstrBot | Python | ★ 41.7K | Compare ↗ |
| #344 | dcloudio/uni-app | JavaScript | ★ 41.6K | Compare ↗ |
| #345 | wshobson/agents | Python | ★ 41.6K | Compare ↗ |
| #346 | apache/dubbo | Java | ★ 41.6K | Compare ↗ |
| #347 | GyulyVGC/sniffnet | Rust | ★ 41.6K | Compare ↗ |
| #348 | facebookresearch/faiss This Project | C++ | ★ 41.2K | |
| #349 | codewhale-hq/Codewhale | Rust | ★ 41.1K | Compare ↗ |
| #350 | appsmithorg/appsmith | TypeScript | ★ 41.1K | Compare ↗ |
| #351 | ToolJet/ToolJet | JavaScript | ★ 41K | Compare ↗ |
| #352 | trpc/trpc | TypeScript | ★ 40.7K | Compare ↗ |
| #353 | pingcap/tidb | Go | ★ 40.7K | Compare ↗ |
Frequently Asked Questions
What does faiss do? +
A library for efficient similarity search and clustering of dense vectors.
Is faiss actively maintained in 2026? +
Yes, faiss is actively maintained. The latest code push was recorded on Oct 26, 2026 (4 days ago). It holds a calculated Maintenance Health Score of 95/100 (A+ rating) with 41,216 stars and 364 open issues.
What language is faiss written in? +
The primary language is C++. Topics include: software.
How many stars does faiss have? +
faiss has 41,216 stars and 4,576 forks on GitHub.
How does faiss rank among GitHub repositories? +
With 41,216 stars, facebookresearch/faiss is ranked #348 globally across all repositories tracked on GitHubRepo and #18 among C++ projects.
What license is faiss distributed under? +
The repository reports a MIT license. Always verify the repository LICENSE file for legal terms.
