Planka

A web‑based Kanban board that lets teams create projects, boards, lists and cards with drag‑and‑drop editing. Changes are synchronized instantly for all users, and card descriptions support rich markdown. The system includes built‑in notifications through many providers, OpenID Connect single sign‑on, and full internationalization for multilingual use.

The software is self‑hostable and available under a fair‑use license, with a free Community Edition and optional paid Pro/Enterprise licenses for additional features and support. Deployment can be performed via Docker or other installation methods, and the source code is publicly visible for customization. It is designed for agile teams that require privacy, control over their data, and real‑time collaboration without a subscription model.

Target users range from small groups to large organizations that need an on‑premise alternative to proprietary Kanban services. The project is actively maintained, has a sizable contributor community, and offers documentation, API access, and a Discord channel for community support.