Letta
AI agents with long-term memory — create chatbots that remember conversations and learn over time
| What is it | AI agents with long-term memory — create chatbots that remember conversations and learn over time |
|---|---|
| Pricing | Freemium |
| Free tier | Yes |
| Platform | Web Application |
| API | Yes |
| Works with | n8n, Zapier |
| Best for | Building conversational AI with memory, Creating self-improving AI systems |
| Domain registered | 2023 |
Data updated Aug. 1, 2026
What does Letta do?
MemGPT is an AI system designed to solve the memory limitations of large language models. It creates AI agents that can maintain long-term memory, learn continuously from interactions, and improve their performance over time. Unlike standard chatbots that forget conversations once they end, MemGPT agents remember past interactions and build knowledge progressively.
The system works through a virtual context management approach that allows agents to operate beyond typical context window constraints. It's model-agnostic, meaning it can work with various AI models rather than being tied to a single provider. The standout feature is its 'sleep-time compute' capability, where agents process and learn from past interactions during idle periods, essentially thinking and improving even when not actively engaged with users.
MemGPT is particularly valuable for developers and researchers building sophisticated AI applications that require persistent memory. It enables use cases like customer service bots that remember individual customer histories, research assistants that build knowledge over multiple sessions, and educational tools that adapt to student progress. The open-source nature makes it accessible for experimentation and customization in various AI projects.
Key features
What makes it stand outWho is Letta for?
Who benefits most from this toolPricing
Free tier available — start without a credit cardFree plan
- 3 stateful agents
- Connect your own LLM API keys (BYOK)
- Chat with agents in the ADE
- Run your agents locally with Letta Code
Pro plan
- 20,000 monthly credits
- Unlimited stateful agents
- Access frontier models on the Letta API
- 20,000 monthly credits
- Pay-as-you-go credit overage
Max plan
Everything in Pro plan, plus:
- Higher usage limits for power users
- Optimized for Letta Code
- Early access to new features
Trust & presence
Gallery
Click any image to enlargeAlternatives in AI Agent
Llongterm
Verified
AI Agent
Adds long-term memory to AI chatbots and agents — remembers user details, preferences, and conversation history.
We and AI
Verified
AI Agent
AI companions with persistent memories and lives — they remember your chats, reach out first, and share their own daily moments.
memU
Verified
AI Agent
Persistent memory infrastructure for AI agents — enables 24/7 operation, user intention prediction, and proactive actions.
YourGPT Chatbot
Verified
AI Agent
Build custom AI chatbots for customer support, sales automation, and business operations with your own data
Inbound GPT Agent
Verified
AI Agent
AI receptionist that answers calls, chats, and books appointments 24/7, no missed calls.
GPT-trainer
Verified
AI Agent
Build AI voice and text agents for customer support, lead qualification, and workflow automation across multiple channels.
Jenova AI
Verified
AI Agent
Platform to access specialized AI agents for work, learning, creation, and life tasks.
Mindverse
AI Agent
Create a digital AI version of yourself to manage tasks and interact online on your behalf.
Similar tools
GPT6
Verified
Chat & Assistants
Advanced AI chatbot with multimodal capabilities, long context memory, and real-time learning across conversations.
supermemory™
Verified
AI API
Universal Memory API for AI agents — gives them long-term memory, user profiles, and contextual understanding.
Memmy Agent
Verified
Knowledge Management
A desktop app that gives AI tools a shared, persistent memory of your preferences and past conversations.
Memorr.ai
Verified
Knowledge Management
Desktop app that maintains context across AI chats using a visual memory canvas — never repeat yourself to ChatGPT, Claude, or Gemini
EverMemOS
Verified
Developer Tools
Long-term memory infrastructure for AI agents, enabling them to remember, adapt, and maintain consistency over time.
MemoryPlugin
Verified
Knowledge Management
Unified memory for ChatGPT, Claude, Gemini and 21+ AI tools — set context once, use anywhere
Memoripy
Verified
Developer Tools
Open-source AI memory layer for developers — adds short-term and long-term memory to AI agents and chatbots.
Works with n8n
View all →
OpenAI
Verified
Models
AI platform offering ChatGPT for conversation, an API for developers, and business solutions — all powered by GPT models.
DeepL Translator
Verified
Translation
AI-powered translation tool delivering superior accuracy for text, documents, and real-time communication across 30+ languages.
Anthropic
Verified
Models
AI research and product company building safe, capable assistants like Claude
ClickUp
AI Workspace
AI-powered project management hub — manage tasks, documents, and collaboration with built-in AI assistants.
VEED.IO
Verified
Video Editor
Online video editor with AI tools for subtitles, dubbing, avatars, and screen recording — all in your browser.
Claude AI
Verified
Chat & Assistants
AI assistant that helps with writing, coding, analysis, and research — chat, generate content, or connect it to your tools
JetBrains
Verified
Developer Tools
A suite of integrated development environments (IDEs) with built-in AI coding assistance for multiple programming languages.
Trello
Verified
Productivity Tools
AI-powered project management tool to organize tasks, track progress, and collaborate with teams using boards, lists, and cards.