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Letta

Open-source framework for stateful AI agents with memory

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Looking for a tool like Letta (Open-source framework for stateful AI agents with memory)? Below are 8 AI tools people use as an alternative to Letta, ranked by leaderboard position. Each one is approved by our editors and worth comparing before you decide.

LangChain
LangChain

The most widely adopted framework for LLM applications

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Flowise
Flowise

Open-source drag-and-drop builder for LangChain workflows

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AutoGPT
AutoGPT

The project that kicked off autonomous AI agents

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Agent GPT
Agent GPT

Deploy an autonomous AI agent from your browser

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Manus
Manus

The Chinese autonomous agent that went viral in early 2025

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Dify
Dify

Open-source platform for building AI apps and agents

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CrewAI
CrewAI

Open-source framework for orchestrating multi-agent AI

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Coze
Coze

ByteDance's no-code platform for building and publishing bots

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