Letta
Letta is an AI research lab in San Francisco that builds machines that learn. It develops experiential agents designed to remember everything, learn continuously, and improve themselves over time.
The product ships as Letta Agent, a self-improving AI agent whose memory, identity, and capabilities evolve with experience. Its research explores memory models trained with memory-native reinforcement learning, principles for how agents manage context to learn from experience, git-based memory with programmatic context management and versioning, continual learning in token space, and sleep-time compute that allows agents to reason about context during idle time rather than at inference. The original foundation traces to MemGPT, an approach to virtual context management treated as an LLM operating system.
Installation uses the command npm i -g @letta-ai/letta-code. The work has been featured in case studies with Bilt, 11x, Kognitos, and Hunt Club. Coverage in outlets such as WIRED, Fast Company, and a video by Matthew Berman has discussed its concepts including sleep-time compute.
Open SourceWebCLISelf-hostedCloud-managed
Overview
5 featuresLetta sits in PulseGate's AI & ML category. It focuses on building AI agents that maintain long-term memory, learn from experience, and evolve their capabilities over time. Letta is an open-source project aimed at developers and AI researchers. Letta is open source under the Open Source license. It runs on the web and the command line, and it can be self-hosted.
Letta AI builds and maintains Letta, and it first shipped in 2023. Among its 5 catalogued features are Stateful Agents, Persistent Memory, and Continual Learning. It exposes integrations via a public API.
Summary written by a language model from the project’s public pages.
- Stateful Agents
- Persistent Memory
- Continual Learning
- Memory Models
- Context Management
Tags
agent-frameworkmemory-managementcontinual-learningstateful-agentsai-os
AI capabilities
TextCode
Inference: Hybrid
Built with & integrations
Hosting
Cloudflare
AI providers
openaianthropic
Connectors
API
Runs on
BrowserCLISelf-hostedCloud-managed
Detected from
- Cloudflare
- cf-ray header · cf-cache-status header
Trust & compliance
License
Open Source
Verified signals
Indexing history
1What PulseGate has recorded for this listing
- Indexed25 Jul · 12:36 UTCTrajectory: A Standard Format for Agent Experience Data verified against its public sourceSource: PulseGate · Open
Frequently asked questions about Letta
- What does Letta do?
- Letta focuses on building AI agents that maintain long-term memory, learn from experience, and evolve their capabilities over time. It is catalogued under AI & ML on PulseGate.
- Who should use Letta?
- Letta is an open-source project built for developers and AI researchers.
- Is Letta free?
- Yes — Letta is open source under the Open Source license and free to use.
- What platforms does Letta run on?
- Letta runs on the web and the command line. It can also be self-hosted.
- Is Letta still active?
- Unverified. Letta has not been re-checked since it entered the index, so there is no finding either way — and only a positive finding would say otherwise.
- What projects are similar to Letta?
- Similar projects tracked by PulseGate include Cliprise, chi-ai, and AI DocuChat.Cliprisechi-aiAI DocuChat
- Who develops Letta?
- Letta is developed by Letta AI, based in the United States.
- How long has Letta been around?
- Letta first shipped in 2023.
Also in AI & ML
Same category — not a similarity match