Best Alternatives to letta
Memory & Context·★ 25.3k·Apache-2.0
Letta is the platform for building stateful agents: open AI with advanced memory that can learn and self-improve over time.
#Stateful AI#Agent Platform#Advanced Memory#CLI#API#Data Analysis
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Best Alternatives to letta
ToolDescriptionStarsLicenseUpdated
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headroom
headroomCompress tool outputs, logs, files, and RAG chunks before they reach the LLM. Around 20% fewer tokens for coding agents and 60-95% fewer for JSON, with the same answers. Library, proxy, and MCP server.
★ 78.0k
Apache-2.0
1d ago
Details →02
mcp-memory-service
mcp-memory-serviceStop re-explaining your project to AI every session. Automatic context memory for Claude, VS Code, Cursor, and 13+ AI tools.
★ 2.1k
Apache-2.0
1d ago
Details →03
context-mode
context-modeContext window optimization for AI coding agents. Sandboxes tool output, 98% reduction. 12 platforms
★ 32.5k
Elastic License 2.0
1d ago
Details →04
Acontext
AcontextData platform for context engineering. Context data platform that stores, observes and learns. Join the community❤️: https://discord.acontext.io
★ 3.7k
Apache-2.0
4d ago
Details →05
memory-bank-mcp
memory-bank-mcpA Model Context Protocol (MCP) server implementation for remote memory bank management, inspired by Cline Memory Bank.
★ 920
MIT
1y ago
Details →06
hera
heraHera makes Python code easy to orchestrate on Argo Workflows through native Python integrations. It lets you construct and submit your Workflows entirely in Python. ⭐️ Remember to star!
★ 947
Apache-2.0
2d ago
Details →07
evolver
evolverThe GEP-powered self-evolving engine for AI agents. Auditable evolution with Genes, Capsules, and Events. | evomap.ai
★ 8.7k
GPL-3.0
4d ago
Details →08
MaiBot
MaiBotMaiSaka, an LLM-based intelligent agent, is a digital lifeform devoted to understanding you and interacting in the style of a real human. She does not pursue perfection, nor does she seek efficiency; instead, she values warmth, authenticity, and genuine connection.
★ 6.6k
GPL-3.0
1d ago
Details →02
Side-by-Side Comparison
| Field | letta | headroom | mcp-memory-service | context-mode |
|---|---|---|---|---|
| Category | Memory & Context | Memory & Context | Memory & Context | Memory & Context |
| Stars | ★ 25.3k | ★ 78.0k | ★ 2.1k | ★ 32.5k |
| License | Apache-2.0 | Apache-2.0 | Apache-2.0 | Elastic License 2.0 |
| Updated | 1w ago | 1d ago | 1d ago | 1d ago |
| Open Source | Yes | Yes | Yes | Yes |
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Decision Guide: When to Choose letta vs Switch
+ When letta is the Best Choice
- You want a long-lived agent that remembers past work and rewrites its own memory and context over time.
- You want one agent reachable from CLI, desktop, browser, mobile and messaging apps, with subagents, schedules and hooks.
- You want memory you can inspect: the README says context is tracked in git and can sync to your own repository.
! When to Look for Alternatives
- You only need to add memory to an agent you already use through MCP; a small MCP memory server is a lighter fit.
- You rely on older Letta tutorials or the V1 API server: the project restructured, and the V1 server is retired.
- You want everything to work without signing in: Letta Cloud is the default backend and some features need it.
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Head-to-Head Comparison Notes
★ 2.1k·Apache-2.0
Letta is a whole agent harness whose memory is part of the agent. MCP Memory Service is a memory add-on that plugs into any MCP client you already use, so pick it if you want to keep your current assistant.
★ 1.1k·Apache-2.0
LycheeMem is a memory framework you embed in your own agent, with working, semantic and procedural stores. Letta ships the agent itself.
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Compare letta With Others
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FAQ
What is letta?
Letta is a powerful platform for building stateful AI agents equipped with advanced memory, enabling them to learn and self-improve over time. It provides both a command-line interface for local agent execution and a comprehensive API with Python and TypeScript SDKs for seamless integration into applications.
What is the best alternative to letta?
headroom is the top-rated alternative to letta in the Memory & Context category.
Is there a free alternative to letta?
headroom is a free, open-source alternative.
Is letta open source?
Yes, letta is open source on GitHub, licensed under Apache-2.0.
Why do users look for alternatives to letta?
You only need to add memory to an agent you already use through MCP; a small MCP memory server is a lighter fit.. You rely on older Letta tutorials or the V1 API server: the project restructured, and the V1 server is retired.. You want everything to work without signing in: Letta Cloud is the default backend and some features need it..