Open source vector-search projects
Every project in the registry tagged vector-search, ranked by real GitHub adoption.
Jupyter Notebooks to help you get hands-on with Pinecone vector databases
A new SOTA for RAG — an original retrieval architecture and an open-source knowledge base for humans and agents.
Distributed vector search for AI-native applications
Python client for Qdrant vector search engine
Benchmark for vector databases.
Related tags
Frequently asked questions
How many open source vector-search projects are there?
This registry tracks 5 projects tagged vector-search, with 10,400 GitHub stars between them. The most-adopted is examples at 3,043 stars.
Are these vector-search projects free to use?
Yes — 5 of the 5 carry an explicit open-source licence across 2 distinct licences, so there is no licence fee. Where a project also sells a hosted or enterprise version, the self-hosted path remains free.
Which vector-search project should I choose?
The list above is ranked by GitHub stars, but stars measure attention rather than fit. Check three things on each card: the licence (permissive versus copyleft), the language it is written in, and the last-push date — a high-star project that has not been pushed in a year is a liability.
Are these vector-search projects still maintained?
5 of the 5 were pushed in the last 90 days, and every card shows its exact last-push date so you can see the rest. Sort your shortlist by that date before committing to a migration.