A agentindex
Comparison

CrewAI vs Letta

A like-for-like, spec-level comparison. Both entries are verified against their docs and repo.

CrewAI

Role-playing multi-agent crews.

  • + Intuitive role-and-task mental model
  • + Fast to prototype multi-agent flows
  • − Less fine-grained control than LangGraph
  • − Can be token-inefficient at scale

Letta

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

  • + First-class long-term memory and stateful agents
  • + Lets agents persist and self-edit context
  • − Narrower focus than general orchestration frameworks
  • − Memory model adds complexity
Spec CrewAI Letta
Role Agent framework Agent framework
Tags agent-framework, library, multi-agent, persona-solo-builder, persona-platform-engineer agent-framework, library, multi-agent, memory, persona-solo-builder, persona-platform-engineer
License MIT Apache-2.0
Open source Yes Yes
Self-hostable Yes Yes
MCP support Yes Yes
Pricing freemium freemium
Price Free Free tier
Usage cost BYOK BYOK
Models claude, gpt, gemini, byok claude, gpt, gemini, byok
Languages python python
GitHub stars 54.9k 23.6k
Last activity 2026-07-03 2026-07-03