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Letta

RAG & agent frameworks ✓ verified ☁ cloud-optional Apache-2.0 ★ 23,749
GitHub ↗ Website ↗

Letta is a platform for stateful agents with long-term memory, designed to support the development of complex AI models.

Who it's for: Developers and researchers who need to build and train stateful agents with long-term memory.

Strengths

  • Supports stateful agents
  • Long-term memory capabilities
  • Open-source under Apache-2.0 license

Trade-offs

  • Limited information on its GitHub repository
  • No official Hugging Face ID

Data locality

Local by default; some features can call external services if you enable them.