# USearch

> Apache-2.0 fast similarity search across languages

**Category:** Databases  
**Pricing:** open-source  
**URL:** https://unum.cloud/usearch  
**GitHub:** https://github.com/unum-cloud/usearch  
**Added:** 2026-09-06

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## The Hook

USearch is the tiny similarity-search engine you embed when FAISS is heavier.

## What's Good

Apache-2.0. C++ core with Python/JS/Rust bindings. Exact and approximate search.

## The Catch

Library, not a managed vector DB. You own persistence. Distinct from Chroma/Weaviate databases and sqlite-vec.

## Verdict

Apache-2.0 embeddable similarity search. Free forever.