Apps similar to Letta include Supermemory, which is open source with a free version. Other options are Memwyre, Cortex by SKYNETLAB and Graphiti. In total there are four Large Language Model (LLM) Tools like Letta for the web and self-hosting.
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.
Memwyre is a universal memory platform and persistent knowledge retrieval layer for Large Language Models (LLMs), AI agents, and custom applications.
India
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.
