hmem
★ 20
vs
letta
★ 23.0k
hmem vs letta
hmem: hmem is a memory system for AI agents that persists project context across sessions, devices, and AI providers. It uses a 5-level lazy loading architecture to minimize token usage while retaining full details. It supports auto-logging, background checkpoints, and cross-platform sync.; 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.
01
TL;DR
Choose hmem if…AI coding assistants that need to maintain project context across sessions
Choose letta if…Running AI agents locally in your terminal for coding and general tasks.
02
Side-by-Side Comparison
03
Features
hmem015-level lazy loading to minimize token usage
02Automatic session logging and background checkpoints via Haiku
03Cross-provider and cross-tool support
04Project-based memory organization
05Encrypted sync across devices
letta01Build stateful AI agents with advanced memory
02Agents capable of learning and self-improvement over time
03CLI tool for running agents locally in your terminal
04Comprehensive API for integrating agents into applications
05Support for skills and subagents; fully model-agnostic
04
Use Cases
hmem↳AI coding assistants that need to maintain project context across sessions
↳Multi-device workflow where different agents continue the same project
↳Knowledge management for personal AI assistants
letta↳Running AI agents locally in your terminal for coding and general tasks.
↳Integrating stateful AI agents into custom applications using the API and SDKs.
↳Developing self-improving AI systems that adapt and learn continually.
05
Best For
hmemTrendingMemory & ContextData Processing
lettaMost PopularTrendingEssential
FAQ
FAQ
What is the difference between hmem and letta?
Both hmem and letta are in the Memory & Context category. hmem has 20 stars, while letta has 23.0k stars.
Which is better, hmem or letta?
The best choice depends on your use case. Choose hmem if AI coding assistants that need to maintain project context across sessions, and letta if Running AI agents locally in your terminal for coding and general tasks..
Is hmem free or open source?
Yes, hmem is open source on GitHub (MIT).
Is letta free or open source?
Yes, letta is open source on GitHub (Apache-2.0).
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