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Excalidraw vs WBO: catalog facts
Excalidraw	WBO
Freemium The editor is free and open source. Excalidraw Plus is a paid subscription.	Free Free and open source under the AGPL-3.0 licence.
Web, Self-hosted	Web, Self-hosted
The sketchy style keeps diagrams feeling provisional rather than final End-to-end encrypted collaboration rooms, and self-hostable	Real-time drawing for many simultaneous users Board state is persisted automatically
Not built for precise technical diagrams Some team features belong to the paid Excalidraw Plus	Freehand whiteboard rather than a structured diagram editor Self-hosting needs a server with Docker or Node.js
Web application, Self-hosted	Web application, Self-hosted
Open source	Open source
License: MIT	License: AGPL-3.0
Not stated if an account is needed	Not stated if an account is needed
Not stated if it works offline	Not stated if it works offline
Official website Full listing and sources Checked September 22, 2026	Official website Full listing and sources Checked October 2, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.