Alternatives to Letta

These tools sit near Letta. Compare features and pricing before you switch.

LangChain's low-level agent orchestration runtime: durable graphs, streaming, human-in-the-loop, and persistence. About 39,835 GitHub stars.

5000000DR: 93AS: 95

OpenAI's official Python and TypeScript agent runtime: agents, handoffs, guardrails, sessions, and tracing.

4000000DR: 95AS: 95

Open-source LLM tracing and evals. Cloud Hobby is $0. Core is $29/seat. Pro is $199/seat. Plus usage after included units.

1500000DR: 90AS: 90