Faiss
CuratedA library for efficient similarity search and clustering of dense vectors.
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#2 Tool of the Day· Aug 21, 2026
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[](https://ossdrop.com/tool/faiss)Frequently asked
What is Faiss?
Faiss is an open-source data & databases tool — A library for efficient similarity search and clustering of dense vectors. It is written in C++.
Is Faiss free and open source?
Yes. Faiss is free and open source, released under the MIT license. You can view and contribute to the source at https://github.com/facebookresearch/faiss.
What language is Faiss written in?
Faiss is primarily written in C++.
What are open-source alternatives to Faiss?
Other open-source data & databases tools on OSSDrop include Apache Superset, Chart.js, Apache ECharts, scikit-learn.
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