What are the best alternatives to Letta (MemGPT)?

The top alternatives to Letta (MemGPT) are LangChain, OpenAI Agents SDK, Claude Agent SDK, ranked by real usage data on Unfragile.

Are there free alternatives to Letta (MemGPT)?

Yes, 17 free alternatives to Letta (MemGPT) exist, including LangChain, OpenAI Agents SDK, Claude Agent SDK.

20 alternatives ranked by real usage data. Letta (MemGPT) scores 58/100 — 20 tools score higher.

Stateful AI agents with long-term memory — virtual context management, self-editing memory.

20 alternatives

17 free options

20 score higher

Framework for building LLM apps — chains, agents, RAG, memory. Python & JS/TS. 200+ integrations.