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Letta

Letta

Stateful agents with persistent, editable memory

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What this product helps you do

Letta is designed around agents that keep state beyond a single context window. Its current agent harness uses a git-backed memory filesystem that agents can inspect and edit, supports tools and extensibility, and can run through desktop, CLI, web, local server, or cloud experiences. Developer plans also support API-driven workloads.

Problems it solves

  • Agents lose useful context when a model context window is compacted
  • Agent identity and learned preferences need to persist across conversations
  • Developers need a consistent harness for tools, memory, and multi-step runs
  • Users need local, application, and cloud paths for running the same agent concept
Best for
Agent application developersDevelopers building persistent assistantsResearchers exploring agent memoryTeams embedding stateful agents into products

Letta builds stateful agents that retain memory, identity, tools, and conversation history across interactions. Its current MemFS system gives agents a git-backed memory filesystem they can inspect and edit, while initialization, explicit teaching, and background consolidation can update durable knowledge over time.

The current Letta experience spans desktop, CLI, web, local server, cloud, and developer interfaces. A free plan supports limited agents and bring-your-own model access, while personal, developer, team, and enterprise paths expand hosted usage, scale, and collaboration.

Information

DeveloperLetta
Languagesen
Pricing modelfreemium
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