hippocampus
★ 12
vs
letta
★ 23.0k
hippocampus vs letta
hippocampus: Hippocampus is an open-source, self-hosted MCP memory server that provides persistent, cross-platform memory for AI assistants. Deploy once and connect to multiple AI platforms such as Claude, ChatGPT, Gemini, Cursor, and Perplexity, enabling them to share and recall context seamlessly. It uses a knowledge graph with local embeddings and encrypts the database at rest.; 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 hippocampus if…Store and recall personal preferences across different AI assistants
Choose letta if…Running AI agents locally in your terminal for coding and general tasks.
02
Side-by-Side Comparison
03
Features
hippocampus01Cross-platform memory sharing across major AI tools via MCP protocol
02Knowledge graph storage with entities, observations, and relationships
03Semantic search using local embeddings (all-MiniLM-L6-v2)
04AES-256 database encryption via SQLCipher, including embedding vectors
05Self-contained OAuth 2.1 authentication with PKCE
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
hippocampus↳Store and recall personal preferences across different AI assistants
↳Maintain project context and decisions when switching between AI tools
↳Avoid repeating information when using multiple AI platforms simultaneously
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
hippocampusTrendingMemory & Context
lettaMost PopularTrendingEssential
FAQ
FAQ
What is the difference between hippocampus and letta?
Both hippocampus and letta are in the Memory & Context category. hippocampus has 12 stars, while letta has 23.0k stars.
Which is better, hippocampus or letta?
The best choice depends on your use case. Choose hippocampus if Store and recall personal preferences across different AI assistants, and letta if Running AI agents locally in your terminal for coding and general tasks..
Is hippocampus free or open source?
Yes, hippocampus is open source on GitHub (AGPL-3.0).
Is letta free or open source?
Yes, letta is open source on GitHub (Apache-2.0).
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