Open source hnsw projects
Every project in the registry tagged hnsw, ranked by real GitHub adoption.
High-performance vector database for GenAI applications
Fast, scalable vector database for AI applications
AI-native vector database for intuitive applications
A lightweight, lightning-fast, in-process vector database
The AI-native database built for LLM applications, providing incredibly fast hybrid search of dense vector, sparse vector, tensor (multi-vector), and full-text.
Related tags
Frequently asked questions
How many open source hnsw projects are there?
This registry tracks 5 projects tagged hnsw, with 118,271 GitHub stars between them. The most-adopted is Milvus at 46,145 stars.
Are these hnsw projects free to use?
Yes — 4 of the 5 carry an explicit open-source licence across 1 distinct licence, so there is no licence fee. Where a project also sells a hosted or enterprise version, the self-hosted path remains free.
Which hnsw 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 hnsw 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.