C++

USearch

Tiny, extremely fast vector index

by unum-cloud · Apache-2.0

Vector databaseVector search libraryApache-2.0Runs locallyC++Intermediate

From the README

✅ [10x faster][faster-than-faiss] [HNSW][hnsw-algorithm] implementation than [FAISS][faiss].
✅ Simple and extensible [single C++11 header][usearch-header] library.
✅ Trusted by giants like Google and DBs like [ClickHouse][clickhouse-docs] & [DuckDB][duckdb-docs].
✅ [SIMD][simd]-optimized and user-defined metrics with JIT compilation.
✅ Hardware-agnostic bf16, e5m2, & i8 - half-precision & quarter-precision support.
✅ View large indexes from disk without loading into RAM.

Excerpts from the project README on GitHub. Copyright and licensing remain with the respective authors.

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Olud Pulse ⓘ ★★★★★★★★★★ /100 signals tracked

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USearch is a compact single-file vector search engine with bindings for a dozen languages, designed for speed and a minimal footprint.

Category	Vector database
Type	Vector search library
License	Apache-2.0
Runs locally	Yes
Built with	C++
Skill level	Intermediate
Best for	embedding vector search inside another app