AI Memory Systems
Letta
Letta is an AI operating system that enables developers to create production-ready stateful agents with persistent memory and infinite context through a single API call.
21,207 stars
Last commit Jan 29, 2026apache-2.0
Epicenter
An ecosystem of open-source, local-first apps that store all your data in plain text and SQLite, giving you complete ownership and control over your personal workspace.
4,113 stars
Last commit Feb 22, 2026mit