Drafft.ink

Drafft.ink is a digital whiteboard with an infinite canvas, written in Rust and rendered with WebGPU. It runs on Linux, Windows, macOS, in the browser and on mobile, works without an account, and offers real-time collaboration through the Loro CRDT. The authors position it as a subscription-free tool, and the code is licensed under AGPL-3.0 so you can use, modify and host it as long as it stays open.

Drawing tools include rectangles, ellipses, lines, arrows and freehand paths with pressure sensitivity, plus smart guides for alignment, equal spacing and angle snapping. Text supports multiple fonts, per-character styling and inline LaTeX math, and images can be dropped or pasted into the document. A sketchy, hand-drawn style is available through the roughr library. Boards export to PNG or JSON, and JSON can be imported back. Touch gestures work on tablets, and the project states there is no telemetry.

For collaboration you run a single-binary server that listens on a WebSocket endpoint with no configuration files, or use the hosted site at drafft.ink. It is comparable to Excalidraw, which appears among its topics.