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207 tools · 25 stacks

AI tools are all over the place. This is the full landscape — 207 tools across 17 categories, mapped and connected. Ready to narrow it down? Build your stack →

Team size

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Use case

Stage

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Stack Layers
What are you building and how is it defined?
How do you write and ship code?
How does your AI think and act?
Which models and infrastructure power it?
How do you build, observe, and extend it?
These tools competes with
Letta
vs
LangGraph

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
Field
Letta
LangGraph
Category
Agent Frameworks
Agent Frameworks
Type
OSS
OSS
Free Tier
✓ Yes
✓ Yes
Plans
Open Source: FreeCloud: $20/mo
—
Stars
⭐ 13,200
⭐ 8,000
Health
●85 — Active
●80 — Active
Trajectory
— not enough data
— not enough data
Synced
today
today

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.

LangGraph

Build stateful multi-actor applications as directed graphs. Part of the LangChain ecosystem. Strong for complex agentic workflows.

Letta Website ↗GitHub ↗
LangGraph Website ↗GitHub ↗

Only Letta (2)

LangGraphOpenAI API

Only LangGraph (25)

CursorCrewAILangChainLangSmithLiteLLMLlamaIndexLangfuseQdrant
See full comparison in Explore →