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 agent-framework, library, multi-agent
License Apache-2.0 Apache-2.0
Open source Yes Yes
Self-hostable Yes Yes
MCP support Yes Yes
Pricing free freemium
Starting price BYOK usage cost Self-host free
Models claude, gpt, gemini, byok claude, gpt, gemini, byok
Languages python python
GitHub stars 40.9k 23.5k
Last activity 2026-06-26 2026-06-26