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