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tldrawOpenBoard
Freemium

The whiteboard is free to use. The SDK requires a licence for production use.

 Free

The open-source software is available without a license fee. Hosting, hardware and…

Web Windows, macOS, Linux
  • Instant, no-signup whiteboard that feels genuinely fast
  • The same engine is available as an embeddable SDK
  • Provides classroom-oriented drawing and presentation tools.
  • The SDK is source-available, not open source, and production use needs a licence
  • Less structured than dedicated diagramming tools
  • Official Linux packages target Debian, with other distributions relying on community builds.
Web application Downloadable app
Closed source Open source
License not stated License: GPL-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

Checked September 22, 2026

Checked September 22, 2026

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