Open source htap projects
Every project in the registry tagged htap, ranked by real GitHub adoption.
Scale-out SQL database for real-time analytics
High-performance distributed database for all workloads
One Postgres for your application data, full-text search, vector retrieval, and aggregations. Home of the pg_search extension.
AI-native HTAP database with Git-for-Data and built-in vector search, serving as the data and memory backbone for intelligent agents and applications.
Related tags
Frequently asked questions
How many open source htap projects are there?
This registry tracks 4 projects tagged htap, with 62,599 GitHub stars between them. The most-adopted is TiDB at 40,701 stars.
Are these htap projects free to use?
Yes — 4 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 htap 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 htap 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.