vs Letta

Mengram vs Letta

Letta (formerly MemGPT) pioneered agent-controlled memory from UC Berkeley research. Mengram takes a different approach with 3 structured memory types and procedural learning.

What Letta does well

  • Novel agent-controlled memory architecture
  • UC Berkeley research-backed (MemGPT paper)
  • Free and self-hostable
  • Great for long-running conversations

What Letta doesn't have

  • No procedural memory
  • Only partial episodic memory (conversation archival)
  • No self-improving workflows
  • No Cognitive Profile
  • Agent memory management adds unpredictability
  • Limited managed hosting options

Feature comparison

Mengram Letta
Semantic memory (facts) ✅ ✅
Episodic memory (events) ✅ Partial
Procedural memory (workflows) ✅ ❌
Self-improving procedures ✅ ❌
Cognitive Profile ✅ ❌
Multi-user isolation ✅ ❌
Knowledge graph ✅ ❌
MCP server ✅ ✅
Import (ChatGPT, Obsidian) ✅ ❌
Self-hostable ✅ ✅
Price Free Free (self-host)

When to choose what

Choose Letta if...

Long-running conversational agents where the agent should organically manage its own context and memory.

Choose Mengram if...

Structured memory with 3 types that the developer controls. Procedures evolve from failures. Free cloud API + MCP + framework integrations.

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