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Tools · Agent framework

Letta

Stateful agents with long-term memory (formerly MemGPT).

Visit site GitHub
Open source Self-hostable MCP support freemium
Agent frameworkLibraryMulti-agent
LicenseApache-2.0
Starting priceSelf-host free
Model supportclaude, gpt, gemini, byok
Languagespython
GitHub stars23.5k
Last activity2026-06-26
VerifiedFri Jun 26 2026 00:00:00 GMT+0000 (Coordinated Universal Time)
Verified byseed

A framework for stateful, long-running agents with persistent memory and self-editing state, evolved from the MemGPT research.

Strengths

  • First-class long-term memory and stateful agents
  • Lets agents persist and self-edit context

Tradeoffs

  • Narrower focus than general orchestration frameworks
  • Memory model adds complexity

Covers

Context management

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