Library / SDK
Retrieval & Memory
USearch
1Fast, 2compact 3vector 4search 5and 6clustering
the six Ws · specification
W1
Who
Maintained by Unum.
W2
What
A fast, compact single-file vector search engine.
W3
Where
An embedded library across many languages.
W4
When
When you need lightweight similarity search anywhere.
W5
Why
Tiny footprint and fast search without a server.
W6
With
Your embeddings and a supported language binding.
W7
Watch
Company-maintained; open-source (Apache-2.0), library only. Runs embedded in your process; data stays local.