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Cognee - Build AI memory with a Knowledge Engine that learns
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Use our knowledge engine to build personalized and dynamic memory for AI Agents.
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🌐 Available Languages
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## About Cognee
Cognee is an open-source knowledge engine that transforms your raw data into persistent and dynamic AI memory for Agents. It combines vector search, graph databases and self-improvement to make your documents both searchable by meaning and connected by relationships as they change and evolve.
Cognee offers default knowledge creation and search which we describe bellow. But with Cognee you can build your modular knowledge blocks!
:star: _Help us reach more developers and grow the cognee community. Star this repo!_
### Cognee Open Source:
- Interconnects any type of data — including past conversations, files, images, and audio transcriptions
- Replaces traditional database lookups with a unified knowledge engine built with graphs and vectors
- Reduces developer effort and infrastructure cost while improving quality and precision
- Provides Pythonic data pipelines for ingestion from 30+ data sources
- Offers high customizability through user-defined tasks, modular pipelines, and built-in search endpoints
## Basic Usage & Feature Guide
To learn more, [check out this short, end-to-end Colab walkthrough](https://colab.research.google.com/drive/12Vi9zID-M3fpKpKiaqDBvkk98ElkRPWy?usp=sharing) of Cognee's core features.
[](https://colab.research.google.com/drive/12Vi9zID-M3fpKpKiaqDBvkk98ElkRPWy?usp=sharing)
## Quickstart
Let’s try Cognee in just a few lines of code. For detailed setup and configuration, see the [Cognee Docs](https://docs.cognee.ai/getting-started/installation#environment-configuration).
### Prerequisites
- Python 3.10 to 3.13
### Step 1: Install Cognee
You can install Cognee with **pip**, **poetry**, **uv**, or your preferred Python package manager.
```bash
uv pip install cognee
```
### Step 2: Configure the LLM
```python
import os
os.environ["LLM_API_KEY"] = "YOUR OPENAI_API_KEY"
```
Alternatively, create a `.env` file using our [template](https://github.com/topoteretes/cognee/blob/main/.env.template).
To integrate other LLM providers, see our [LLM Provider Documentation](https://docs.cognee.ai/setup-configuration/llm-providers).
### Step 3: Run the Pipeline
Cognee will take your documents, generate a knowledge graph from them and then query the graph based on combined relationships.
Now, run a minimal pipeline:
```python
import cognee
import asyncio
from pprint import pprint
async def main():
# Add text to cognee
await cognee.add("Cognee turns documents into AI memory.")
# Generate the knowledge graph
await cognee.cognify()
# Add memory algorithms to the graph
await cognee.memify()
# Query the knowledge graph
results = await cognee.search("What does Cognee do?")
# Display the results
for result in results:
pprint(result)
if __name__ == '__main__':
asyncio.run(main())
```
As you can see, the output is generated from the document we previously stored in Cognee:
```bash
Cognee turns documents into AI memory.
```
### Use the Cognee CLI
As an alternative, you can get started with these essential commands:
```bash
cognee-cli add "Cognee turns documents into AI memory."
cognee-cli cognify
cognee-cli search "What does Cognee do?"
cognee-cli delete --all
```
To open the local UI, run:
```bash
cognee-cli -ui
```
## Demos & Examples
See Cognee in action:
### Persistent Agent Memory
[Cognee Memory for LangGraph Agents](https://github.com/user-attachments/assets/e113b628-7212-4a2b-b288-0be39a93a1c3)
### Simple GraphRAG
[Watch Demo](https://github.com/user-attachments/assets/f2186b2e-305a-42b0-9c2d-9f4473f15df8)
### Cognee with Ollama
[Watch Demo](https://github.com/user-attachments/assets/39672858-f774-4136-b957-1e2de67b8981)
## Community & Support
### Contributing
We welcome contributions from the community! Your input helps make Cognee better for everyone. See [`CONTRIBUTING.md`](CONTRIBUTING.md) to get started.
### Code of Conduct
We're committed to fostering an inclusive and respectful community. Read our [Code of Conduct](https://github.com/topoteretes/cognee/blob/main/CODE_OF_CONDUCT.md) for guidelines.
## Research & Citation
We recently published a research paper on optimizing knowledge graphs for LLM reasoning:
```bibtex
@misc{markovic2025optimizinginterfaceknowledgegraphs,
title={Optimizing the Interface Between Knowledge Graphs and LLMs for Complex Reasoning},
author={Vasilije Markovic and Lazar Obradovic and Laszlo Hajdu and Jovan Pavlovic},
year={2025},
eprint={2505.24478},
archivePrefix={arXiv},
primaryClass={cs.AI},
url={https://arxiv.org/abs/2505.24478},
}
```
