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Letta Alternatives in 2026

The best 8 open-source Letta alternatives in 2026, ranked by GitHub stars. Find free, self-hosted replacements for Letta.

8 Alternatives
100% Open Source
Free To Self-Host

What are the best Letta alternatives in 2026?

The best open-source Letta alternatives in 2026 are LangGraph, AutoGPT, Langflow, Dify, MCP Servers. These tools cover the same use cases as Letta — stateful llm agents with long-term memory (formerly memgpt) — with the advantage of being open-source, free to self-host, and backed by active communities. Top picks are ranked by GitHub stars and community adoption, so you can find a drop-in replacement that fits your workflow.

#1
LangGraph ★ 40k+ Top Pick

Build stateful multi-actor LLM applications as graphs

agent graph stateful open-source
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#2
AutoGPT ★ 186k+ Top Pick

Autonomous AI agent platform for complex task execution

agent autonomous open-source llmMIT
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#3
Langflow ★ 153k+ Top Pick

Visual framework for building AI agents and RAG apps

agent workflow rag open-sourceMIT
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#4
Dify ★ 153k+

Open-source LLM app development and orchestration platform

agent platform workflow open-sourceApache-2.0
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#5
MCP Servers ★ 90k+

Reference implementations for Model Context Protocol servers

agent mcp tools open-source
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#6
OpenHands ★ 85k+

Platform for AI software development agents

agent code autonomous open-sourceMIT
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#7
MetaGPT ★ 70k+

Multi-agent framework assigning roles to GPT models

agent multi-agent code open-sourceMIT
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#8
Open Interpreter ★ 68k+

Autonomous agent that writes and executes code on your machine

agent code autonomous open-sourceAGPL-3.0
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Last updated: Aug 28, 2026 · Curated by AI Tools Hub Editorial · About · Contact · Privacy