## Startup showcase (1-1 of 1)

### Excalidraw
A virtual whiteboard for hand-drawn diagrams

134,644 GitHub stars (excalidraw/excalidraw, MIT, 2026-10-27)

Website · Design & creative · by Excalidraw · launched 2020-01-02. https://excalidraw.com

- Frontend: React, Vite
- Hosting: Vercel (`vercel`, priced)
- Database: Firebase (`firebase`, priced)
- Realtime: Socket.IO
- Monitoring: Sentry (`sentry`, priced)

Most used: Firebase (1), React (1), Sentry (1), Socket.IO (1), Vercel (1), Vite (1).

**Caveats (show these word for word)**
- Stacks are read from each product's public code (manifests and environment templates) on the date shown; a service listed there may be optional or used only by the hosted version. GitHub and App Store figures are as read on their checked_at date.

Confidence: medium.

Use estimate_cost or audit_stack with the priced vendor ids to see what a stack like this costs.