Excalidraw
Open-source virtual whiteboard for creating hand-drawn style diagrams and sketches.
Open source alternative to:
Excalidraw is a virtual whiteboard tool that lets you create diagrams and sketches with a charming hand-drawn aesthetic. It runs entirely in the browser with no account required, making it fast and frictionless to start drawing.
It supports real-time collaboration, allowing teams to brainstorm and diagram together simultaneously. Excalidraw supports shapes, arrows, freehand drawing, text, and image embedding — everything you need for quick wireframes, flowcharts, and system diagrams.
Beyond the hosted app, Excalidraw ships as an embeddable React component (@excalidraw/excalidraw), making it easy to integrate into your own applications. With 100k+ GitHub stars and an MIT license, it is one of the most widely adopted open-source diagramming tools available.
Build with:
Repository details
Updated 3/30/2026, 8:00:15 AM
View RepositoryCompare Excalidraw with
Similar open source alternatives
Etherpad
Open-source real-time collaborative text editor you can self-host.
Google Docs
Jitsi Meet
Open-source video conferencing platform — free, secure, and self-hostable.
Google Meet
Penpot
Open-source design and prototyping tool for cross-domain teams — a self-hostable alternative to Figma.
ONLYOFFICE
Self-hosted office suite with real-time collaboration.
Google Docs
CryptPad
End-to-end encrypted collaborative office suite with zero-knowledge privacy.
Google Docs
Mastodon
Decentralized social network server that federates with the broader Fediverse — run your own instance instead of relying on Twitter/X.