Better coffee, one brew at a time.

We build open-source tools for people who love coffee and want to understand what makes a great cup.

Our main project, Roastbook, is a self-hosted coffee journal. Keep your brews, beans, recipes, gear, and café discoveries together, with your data on your own infrastructure.

_{Real app screen with sample data, set in an AI-generated coffee scene.}

• Remember the good cups. Log brew parameters, tasting notes, and ratings so you can make them again.
• Get to know your coffee. Track coffees and individual bags, from roast date to the last dose.
• Find your next adjustment. Explore trends across beans, brewing methods, and equipment.
• Bring AI if you want it. Scan coffee labels, research roasters, and get brew recommendations through your own AI provider.
• Keep brewing offline. Install the app, log without a connection, and sync when you reconnect.
• Make it yours. Self-host with Docker or Helm, and connect your own tools through the REST API and MCP server.

We also publish coffee facts that anyone can reuse in an app, a map, or a guide:

• Open Coffee Data: an open dataset of cafés, brew methods, and pour-over recipes. Browse it in the Data Explorer. Data under CDLA-Permissive-2.0, code under MIT.
• Open Coffee Schema: an open standard for describing coffee places, equipment, brew methods, and pour patterns. Every field is explained in the Schema Explorer. MIT licensed.

Open the app · Website · Open Coffee Data · Open Coffee Schema · Try the demo · Source code · Documentation

Bug reports, ideas, documentation improvements, and code contributions are welcome. Explore the project, try it with your coffee setup, and help shape what comes next.

Open source under the MIT license. Built for your daily ritual.