A agentindex
Comparison

Agno vs Letta

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

Agno

A high-performance multi-agent framework and runtime (formerly Phidata).

  • + Built-in runtime, tracing, and management UI
  • + Strong on multi-modal, memory-heavy agents
  • − Broad surface area to learn
  • − Fast-moving after the Phidata rebrand

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 Agno 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 Apache-2.0 Apache-2.0
Open source Yes Yes
Self-hostable Yes Yes
MCP support Yes Yes
Pricing free freemium
Price Free Free tier
Usage cost BYOK BYOK
Models claude, gpt, gemini, byok claude, gpt, gemini, byok
Languages python python
GitHub stars 41.0k 23.6k
Last activity 2026-07-03 2026-07-03