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Limnu vs WBO: catalog facts
Limnu	WBO
Freemium Free to try, with paid plans for regular use.	Free Free and open source under the AGPL-3.0 licence.
Web	Web, Self-hosted
Smooth freehand drawing that resembles a physical whiteboard Start sketching without signing up	Real-time drawing for many simultaneous users Board state is persisted automatically
Freehand focus, not suited to structured diagrams Works online only	Freehand whiteboard rather than a structured diagram editor Self-hosting needs a server with Docker or Node.js
Web application	Web application, Self-hosted
Closed source	Open source
License not stated	License: AGPL-3.0
No account 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 October 2, 2026	Official website Full listing and sources Checked October 2, 2026

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