Letta vs Memary
Side-by-side comparison of two AI agent tools
Short answer
- Memary has had no commit in 23 months; Letta is actively maintained (7 commits in the last 90 days).
- Letta is growing faster: +513 GitHub stars in the last 30 days vs +12 for Memary.
- Pick Letta for: letta is the platform for building stateful agents: AI with advanced memory that can learn and self-improve. Pick Memary for: the Open Source Memory Layer For Autonomous Agents.
From GitHub data refreshed daily.
Lettaopen-source
Letta is the platform for building stateful agents: AI with advanced memory that can learn and self-improve over time.
Memaryopen-source
The Open Source Memory Layer For Autonomous Agents
Metrics
| Letta | Memary | |
|---|---|---|
| Stars | 25.0k | 2.7k |
| Star velocity /mo | 512.8571428571429 | 12.063492063492063 |
| Commits (90d) | 7 | 0 |
| Releases (6m) | 1 | 0 |
| Overall score | 0.5869394693270381 | 0.21131434678490732 |
Pros
- +Advanced persistent memory system that allows agents to learn and improve over time across sessions
- +Dual deployment options with both local CLI tool and cloud API for different use cases and security requirements
- +Model-agnostic architecture supporting multiple LLM providers with extensive SDK support for TypeScript and Python
- +开源透明的记忆管理系统，允许完全自定义和扩展记忆机制
- +同时支持本地模型（Ollama）和云端模型（OpenAI），提供灵活的部署选择
- +内置模型切换功能，可以无缝在不同AI提供商之间切换而无需重写代码
Cons
- -Requires Node.js 18+ for CLI usage, which may limit adoption in some environments
- -API-based functionality requires API keys and cloud dependency for full feature access
- -As a relatively new platform for stateful agents, may have a learning curve for developers new to persistent memory concepts
- -严格的Python版本限制（<=3.11.9），可能与较新的开发环境不兼容
- -复杂的初始配置，需要设置多个API密钥和数据库连接
- -依赖特定的模型框架和外部服务，增加了系统的复杂性和维护成本
Use Cases
- •Building coding assistants that remember project context and learn from previous debugging sessions
- •Creating customer support agents that maintain conversation history and learn customer preferences over time
- •Developing personal AI assistants that evolve their responses based on user behavior patterns and feedback
- •构建需要跨会话保持记忆的AI客服或助手系统，提供个性化的用户体验
- •开发具有长期学习能力的自主AI智能体，用于复杂的决策和规划任务
- •创建多轮对话AI应用，如教育助手或咨询系统，需要记住历史交互内容
FAQ
- Which is more popular, Letta or Memary?
- Letta has more GitHub stars (25,005 vs 2,654).
- Which is more actively developed, Letta or Memary?
- Letta had more commits in the last 90 days (7 vs 0).
- Should I use Letta or Memary?
- Compare their capabilities, limitations and "best for" notes above. Both are open source, so trying each on a small task is the fastest way to decide.