Open source vector projects
Every project in the registry tagged vector, ranked by real GitHub adoption.
Full-text & vector search at the edge.
Unify vector search and graph traversals in one database
S3 compatible object storage service that stores metadata in Postgres
ID-based RAG FastAPI: Integration with Langchain and PostgreSQL/pgvector
Frequently asked questions
How many open source vector projects are there?
This registry tracks 4 projects tagged vector, with 19,116 GitHub stars between them. The most-adopted is Orama at 10,591 stars.
Are these vector projects free to use?
Yes — 3 of the 4 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 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 projects still maintained?
4 of the 4 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.