seekdb

The AI-Native Search Database. Best for agent storage, it unifies vector, text, structured, and semi-structured data into a single engine. This all-in-one database makes agents smarter, easier to run, and more stable. Maintained by oceanbase on GitHub, where it has earned 2,823 stars from the community.

It's actively developed around ai-agents, copy-on-write, embedded-database, and is a solid reference for anyone building with these tools.