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Best Letta Alternatives

145 frameworks you can use instead of Letta. Ranked by popularity, tag overlap, and live GitHub signals.

memorystatefulpythonlong-term-memoryagentsopen-source
L

Letta

Reference

Stateful agents with long-term memory — formerly MemGPT — 15K stars

23.7K120.0K/w7d ago139
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Top Alternatives to Letta

A

Agno

Build, run, and manage agentic software at scale with 38K+ stars

OSSFree
Agno AGI
41.1Ktoday444
3 shared tags
L

LangGraph

LangChain's framework for building stateful agent graphs — 26K+ stars

OSSFree
LangChain
37.0Ktoday275
3 shared tags
H

Haystack

End-to-end LLM framework for building NLP and agent pipelines — 18K+ stars

OSSFree
deepset
25.9K600.0K/wtoday383
3 shared tags
A

Anthropic Agent SDK

Claude-native agent framework with built-in MCP and tool use — 4.6K stars

OSSFree
Anthropic
3.7K2.5M/wtoday59
3 shared tags
E

ELITE

Self-improving embodied AI framework that learns from mistakes and transfers knowledge across tasks

OSSFree
Research Team
3 shared tags
I

IronEngine

Unified orchestration platform with multi-phase planning, 24-category tools, and adaptive model switching

OSSFree
Independent Research
3 shared tags
L

LangChain

Build context-aware reasoning applications with LLMs

OSSFree
LangChain AI
141.5K850.0K/wtoday468
2 shared tags
M

Microsoft Agent Framework

Unified multi-agent framework merging AutoGen and Semantic Kernel

OSSFree
Microsoft
59.6K800.0K/w12w ago445
2 shared tags
L

Langflow

Visual framework for building and deploying AI agents — 145K+ stars

OSSFree
Langflow AI
151.5Ktoday338
2 shared tags
L

LiteLLM

Universal LLM API gateway for 200+ providers — 38K+ stars

OSSFree
BerriAI
53.2Ktoday382
2 shared tags
M

MetaGPT

Multi-agent framework — the first AI software company — 65K+ stars

OSSFree
FoundationAgents
69.3K24w ago116
2 shared tags
D

DSPy

Framework for programming — not prompting — LLMs — 33K+ stars

OSSFree
Stanford NLP
36.0Ktoday401
2 shared tags

Compare directly

Letta vs AgnoLetta vs LangGraphLetta vs HaystackLetta vs Anthropic Agent SDK