FAISS
Library for efficient similarity search and clustering of dense vectors at scale.
ML and data science PyPI
Used in agent projects
42
0.3% of 12,697 public repos built with AI coding agents
Rank in ml and data science
#14 of 28
by use in those projects
Downloads
2.9M
PyPI, last 7 days, faiss-cpu
GitHub stars
41.1K
last push Oct 10, 2026
How FAISS is used
FAISS is a dependency in 42 of the 12,697 public GitHub projects set up for AI coding agents that we scanned (0.3%), #14 of 28 in ml and data science. The most used alternative there is NumPy. Projects that use it most often also use python-dotenv (71.4%), NumPy (64.3%), Pydantic (61.9%).
Often used with FAISS
| python-dotenv | 71.4% of FAISS projects · 11.0× more than average |
|---|---|
| NumPy | 64.3% of FAISS projects · 16.8× more than average |
| Pydantic | 61.9% of FAISS projects · 12.1× more than average |
| Sentence Transformers | 57.1% of FAISS projects · 87.4× more than average |
| LangChain (Python) | 52.4% of FAISS projects · 47.2× more than average |
| FastAPI | 50.0% of FAISS projects · 11.8× more than average |
| Uvicorn | 50.0% of FAISS projects · 11.7× more than average |
| pandas | 50.0% of FAISS projects · 16.6× more than average |
By coding agent
| GitHub Copilot | 0.8% of projects set up for it |
|---|---|
| Claude Code | 0.4% of projects set up for it |
| Cursor | 0.6% of projects set up for it |
Share of public repos configured for each agent that list FAISS as a dependency.
Install
| Package | pip install faiss-cpu |
|---|---|
| Main stacks | Python (42) |
| Example projects | sidetrip-ai/ici-core, MDalamin5/End-to-End-Agentic-Ai-Automation-Lab, timowhite88/Farnsworth, particlefuture/1mcpserver, Beneficial-AI-Foundation/vericoding |
Alternatives to FAISS
| Tool | Used in agent projects | Downloads / wk | GitHub stars | License |
|---|---|---|---|---|
| NumPy pypi Fundamental Python library for numerical computing with arrays and matrices. |
487 (3.8%) | 21M | 33K | — |
| pandas pypi Data manipulation and analysis library with DataFrames for structured data. |
383 (3.0%) | 143M | 50K | — |
| scikit-learn pypi Python machine learning library with classification, regression and clustering algorithms. |
160 (1.3%) | 44.3M | 67.5K | — |
| SciPy pypi Fundamental algorithms for scientific computing with optimized numerical routines. |
141 (1.1%) | 72.2M | 15.1K | — |
| PyTorch pypi Deep learning framework with tensors and dynamic neural networks with GPU support. |
109 (0.9%) | 13.2M | 104K | — |
| Sentence Transformers pypi Pre-trained models for semantic embeddings, retrieval and reranking. |
83 (0.7%) | 5.1M | 19.2K | — |
| Hugging Face Transformers pypi State-of-the-art NLP and multimodal models for inference and training. |
80 (0.6%) | 24.8M | 167K | Apache 2.0 License |
| NetworkX pypi Python package for creating, analyzing and manipulating complex networks and graphs. |
73 (0.6%) | 50.2M | 17.3K | — |