Best Open Source Whiteboarding Tools using CSS in 2026

Excalidraw

Collaborative whiteboard with a hand-drawn aesthetic

Stars
124,369
Forks
13,862
Last commit
7 days ago

Virtual whiteboard for sketching diagrams, flowcharts, and wireframes with a distinctive hand-drawn look. Real-time collaboration built in.

Open Source Alternative to:

Miro

Affine

Docs, whiteboards, and databases in one privacy-first workspace

Stars
68,949
Forks
4,896
Last commit
4 hours ago

An open-source, local-first knowledge base that merges structured docs, infinite whiteboards, databases, and AI into a single workspace for teams and creators.

Open Source Alternative to:

Notion

Tldraw

Free instant whiteboard with real-time collaboration

Stars
47,541
Forks
3,266
Last commit
3 days ago

Virtual whiteboard that works instantly on any device, no signup required, with real-time multiplayer collaboration built in.

Open Source Alternative to:

Miro

Stars
Forks
Last commit

Stars
Forks
Last commit

Stars
Forks
Last commit

Stars
Forks
Last commit

Stars
Forks
Last commit

Stars
Forks
Last commit

Excalidraw

Collaborative whiteboard with a hand-drawn aesthetic

Stars
124,369
Forks
13,862
Last commit
7 days ago

Virtual whiteboard for sketching diagrams, flowcharts, and wireframes with a distinctive hand-drawn look. Real-time collaboration built in.

Open Source Alternative to:

Miro

Affine

Docs, whiteboards, and databases in one privacy-first workspace

Stars
68,949
Forks
4,896
Last commit
4 hours ago

An open-source, local-first knowledge base that merges structured docs, infinite whiteboards, databases, and AI into a single workspace for teams and creators.

Open Source Alternative to:

Notion

Tldraw

Free instant whiteboard with real-time collaboration

Stars
47,541
Forks
3,266
Last commit
3 days ago

Virtual whiteboard that works instantly on any device, no signup required, with real-time multiplayer collaboration built in.

Open Source Alternative to:

Miro

Open Source Whiteboarding Tools using CSS

A curated collection of the best open source virtual whiteboard applications for sketching and collaboration. using CSS.

Excalidraw

Affine

Tldraw

Excalidraw

Affine

Tldraw