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Atomic Agents vs Letta
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Free
Free
AI Agents
Annual estimate10 people, entry price
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AI Agents
Overview
Focus
AI Agents
Autonomous Agents Platforms
Product
Lightweight Python framework for building modular, predictable, production-ready AI agents using Pydantic.
Stateful AI agent framework formerly MemGPT, enabling agents with persistent memory and self-editing context for long-running tasks.
Headquarters
Ghent, Belgium
Berkeley, California
Company size
2-10 employees
11-50 employees
Founded
2024
2023
Pricing details
Published rate
Free
Free
Free options
Free plan
Free plan, Free trial
Source updated
Oct 30, 2026
Nov 2, 2026