These tools competes with
LettavsLangGraph
Stateful agents with long-term memory — formerly MemGPT versus Graph-based stateful agent orchestration
Compare interactively in Explore →Choose Letta when…
- •need agents with persistent cross-session memory
- •context window length is limiting your application
- •building personal assistants or long-running agents
Choose LangGraph when…
- •You need stateful, graph-based agent control flow
- •Complex branching or retry logic is required
- •You're building production agents that need observability
Side-by-side comparison
Field
Letta
LangGraph
Category
Agent Frameworks
Agent Frameworks
Type
Open Source
Open Source
Free Tier
✓ Yes
✓ Yes
Pricing Plans
Open Source: FreeCloud: $20/mo
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GitHub Stars
⭐ 13,200
⭐ 8,000
Health
●85 — Active
●80 — Active
Letta
Letta (formerly MemGPT) is an open-source framework for building stateful AI agents with persistent, editable memory. Agents remember conversations across sessions, search their own memory, and update their knowledge over time — solving context window limitations.
Only Letta (2)
LangGraphOpenAI API
Only LangGraph (25)
CrewAILangSmithLiteLLMLlamaIndexLangfuseQdrantE2BpgvectorClaude CodeSweep AI
Explore the full AI landscape
See how Letta and LangGraph fit into the bigger picture — 207 tools, 452 relationships, all mapped.