Cognee

Cognee is an open source AI memory platform that gives agents persistent long term memory across sessions. Instead of a passive vector store, it combines vector embeddings, graph reasoning, and relational storage into a single engine, and continuously builds a self hosted knowledge graph through an Extract, Cognify, Load pipeline that ingests data from more than thirty sources and structures it into entities, relationships, and ontology grounded meaning. A memify layer then refines the graph through feedback, so rated responses feed back into edge weights and the memory gets sharper with use. The company raised a seven and a half million dollar seed round in early 2026, is independent, and runs live in more than seventy companies including Bayer and the University of Wyoming, with over a million pipeline runs a month and more than twelve thousand GitHub stars.

The developer facing surface is a memory native API built around four operations, remember, recall, forget, and improve, available through Python and TypeScript SDKs, a CLI, and the Model Context Protocol so any MCP compatible agent framework can use Cognee as a shared memory service. It integrates natively with LangGraph, CrewAI, the Claude Agent SDK, the OpenAI Agents SDK, Google ADK, and n8n, and separates short term session memory for fast reasoning from permanent long term knowledge, with tenant and user isolation so multiple agents can share one graph while keeping their own write scope.

Cognee runs embedded with sensible defaults, then swaps in Neo4j, Neptune, Qdrant, or pgvector when a team scales, and a Rust engine targets on device and edge memory where latency and privacy matter. Pricing keeps the open source core free to self host, adds a free cloud tier with one workspace and a million tokens included and no card required, a usage based Cloud Pro at two dollars and fifty cents per million tokens, and an Enterprise tier with a private cloud, bring your own key, dedicated support, and SLAs. Full data ownership and deployment flexibility are the core promise.