Letta

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Letta is an open source framework for building stateful LLM applications. You can use Letta to build stateful agents with advanced reasoning capabilities and transparent long-term memory. The Letta framework is white box and model-agnostic.0
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What is Letta?

Letta is a cutting-edge AI development platform that adds long-term memory and advanced reasoning to large language models (LLMs). With Letta, developers can create, deploy, and manage stateful AI agents that improve over time. The platform offers a white box, model-agnostic framework, allowing developers full visibility and control over their models and agents. Letta’s hosted cloud and robust APIs enable seamless scaling for production applications, while the Agent Development Environment (ADE) provides an intuitive interface for building and monitoring agents.

Key Features:

  1. 🌐 Hosted Cloud for Agent Deployment
    Deploy and manage AI agents at scale with Letta’s cloud infrastructure, ensuring smooth production workflows and reducing operational overhead.

  2. 🧠 Long-Term Memory for Agents
    Equip your AI agents with persistent memory, allowing for consistent, long-term interactions and self-editing personas that evolve over time.

  3. 🛠️ Model-Agnostic & White Box
    Use any LLM provider you prefer and maintain full transparency into the system’s inner workings, ensuring flexibility and control over your AI applications.

Use Cases:

  1. Personalized Chatbots
    Develop chatbots that remember user preferences and past interactions, offering a personalized experience that improves with each conversation.

  2. Enterprise AI Solutions
    Connect AI agents to private data sources, enabling secure, enterprise-level applications like medical assistants that access patient records for informed decision-making.

  3. Automated Workflows
    Create agents that automate complex workflows, such as monitoring email inboxes and sending alerts for urgent messages, streamlining daily tasks.

Conclusion:

Letta empowers developers to build advanced, stateful AI agents with unmatched memory and reasoning capabilities. Its model-agnostic framework, combined with scalable cloud infrastructure, ensures that your agents can grow and adapt to various use cases, from personalized chatbots to enterprise solutions. With Letta, you gain full control over your AI systems, making it the ideal platform for developers aiming to push the boundaries of agent development.

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More information on Letta

Launched
1997-10
Pricing Model
Free
Starting Price
Global Rank
357512
Follow
Month Visit
85K
Tech used
Plausible Analytics,Webflow,Amazon AWS CloudFront,cdnjs,Cloudflare CDN,JSDelivr,unpkg,jQuery,Gzip,HTTP/3,OpenGraph,HSTS

Top 5 Countries

40.88%
10.61%
6.21%
5.81%
4.03%
United States India Canada Indonesia Vietnam

Traffic Sources

3.97%
0.72%
0.07%
8.67%
32.47%
54.06%
social paidReferrals mail referrals search direct
Source: Similarweb (Sep 25, 2025)
Letta was manually vetted by our editorial team and was first featured on 2025-01-01.
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