Cognee

Cognee is an open-source AI memory platform: feed it documents, code, tickets, and conversations and it builds a persistent knowledge graph your agents can search and reuse across sessions. It is designed to run locally for free — the default pipeline uses small models on CPU with no API key required — while letting you plug in stronger hosted models. The team frames the flagship use case as a 'Company Brain' shared between humans and agents, and published a research paper on the knowledge-graph/LLM interface in 2025.

```bash

pip install cognee

```

```python

import cognee

# Add documents to memory

await cognee.add("The project deadline moved to Friday.")

await cognee.cognify()

# Ask across everything remembered

answer = await cognee.search("When is the deadline?")

```

Runs locally by default (no API key). Configure hosted LLMs/embeddings via env vars for higher quality. Docs: docs.cognee.ai.