Excalidraw
Windmill
| Feature | Excalidraw | Windmill |
|---|---|---|
| Pricing | Free / from $7/mo | Free / from $10/mo |
| Free Plan | ✓ Yes | ✓ Yes |
| Rating | 4.7 / 5 | 4.4 / 5 |
| Best For | developers, product-teams, educators, brainstorming-sessions | developers, devops-teams, internal-tools, data-pipelines |
| Founded | 2020 | 2022 |
| Freehand Drawing | ✓ | ✗ |
| Real Time Collaboration | ✓ | ✗ |
| Component Library | ✓ | ✗ |
| Export Options | ✓ | ✗ |
| End To End Encryption | ✓ | ✗ |
| Embeddable | ✓ | ✗ |
| Shapes And Arrows | ✓ | ✗ |
| Workflow Editor | ✗ | ✓ |
| Script To Ui | ✗ | ✓ |
| Scheduling | ✗ | ✓ |
| Approval Flows | ✗ | ✓ |
| Multi Language | ✗ | ✓ |
| Self Hostable | ✗ | ✓ |
| Audit Logs | ✗ | ✓ |
✓ Excalidraw Pros
- Beautiful hand-drawn sketch aesthetic
- Completely free and open source core
- Real-time collaboration with shared links
- Library of reusable components and templates
- Embeddable in other applications
✗ Excalidraw Cons
- Limited formatting compared to structured diagramming tools
- No presentation mode built-in
- File management basic without Excalidraw+
✓ Windmill Pros
- Open-source and self-hostable
- Supports Python, TypeScript, Go, Bash, SQL natively
- Auto-generates UI from script parameters
- Excellent scheduling and workflow orchestration
✗ Windmill Cons
- Smaller community than Zapier/n8n
- Self-hosting requires infrastructure knowledge
- Less polished documentation for beginners
The Verdict
Excalidraw is built for developers and product teams, with a focus on freehand-drawing and real-time-collaboration. Windmill targets developers and devops teams and leads with workflow-editor and script-to-ui.
Pricing is close: Excalidraw starts at $7/mo versus $10/mo for Windmill — not a deciding factor on its own.
Both offer free plans, so you can test each with your real workflow before committing to a subscription.
Both tools are a solid fit for developers — in those cases, the decision often comes down to workflow style and how your team prefers to organize work.
Bottom line: Excalidraw has a slight overall edge — but if open-source and self-hostable matters most to you, Windmill may still be the right call.