Letta is described as 'Platform for building stateful AI agents with long-term memory that learn and self-improve over time, from the creators of MemGPT' and is a large language model (llm) tool in the ai tools & services category. There are three alternatives to Letta for Web-based, Self-Hosted, SaaS, Docker and Python. The best Letta alternative is Supermemory, which is both free and Open Source. Other great apps like Letta are Cortex by SKYNETLAB and Graphiti.
Memory API and context engine for AI applications that stores knowledge from conversations, documents and connected apps, and retrieves it with low-latency hybrid search.
Hosted semantic memory for AI assistants over MCP, with a quality gate that rejects redundant writes instead of storing everything.
Open source Python framework for building real-time, temporally aware knowledge graphs for AI agents, so they can track facts and how those facts change over time.
