Open-source SaaS alternatives (self-hosting)
excalidraw/excalidraw
Virtual whiteboard for hand-drawn style diagrams
- 130k
- MIT
- TypeScript
What it is and why it matters
Excalidraw is a browser-based virtual whiteboard for sketching hand-drawn style diagrams, with live collaboration. One video presents it as a free alternative to Miro and Lucidchart; in another, an agent uses it through a skill to draw a concept (learning curves) pulled from a book, live.
Key points
- Hand-drawn style diagrams straight in the browser
- Live collaboration and one-click export
- Usable by an agent via a skill to generate diagrams automatically
Where we saw it
Kacper Rutkiewicz | AI Made Simple 2026-08-04 The host uses the Excalidraw diagram skill so Claude Code draws, live, the learning curves explained in a book, inside Obsidian. I Accidentally Turned a Book into an AI Agent Cloud Codes 2026-07-03 It is cited as a free alternative to Miro and Lucidchart for architecture sketches, with live collaboration. 10 Github Repos That Will Kill Your Monthly Subscriptions
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