What are the best alternatives to letta?

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

Are there free alternatives to letta?

Yes, 17 free alternatives to letta exist, including LangChain, OpenAI Agents SDK, Claude Agent SDK.

20 alternatives ranked by real usage data. letta scores 22/100 — 20 tools score higher.

Originalletta

Create LLM agents with long-term memory and custom tools

20 alternatives

17 free options

20 score higher

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