ToolJet
Windmill
| Feature | ToolJet | Windmill |
|---|---|---|
| Pricing | Free / from $20/mo | Free / from $10/mo |
| Free Plan | ✓ Yes | ✓ Yes |
| Rating | 4.1 / 5 | 4.4 / 5 |
| Best For | developers, startups, ops-teams, small-businesses | developers, devops-teams, internal-tools, data-pipelines |
| Founded | 2021 | 2022 |
| Visual Builder | ✓ | ✗ |
| Data Sources | ✓ | ✗ |
| Workflows | ✓ | ✗ |
| Custom Code | ✓ | ✗ |
| Version Control | ✓ | ✗ |
| Multi Tenancy | ✓ | ✗ |
| Workflow Editor | ✗ | ✓ |
| Script To Ui | ✗ | ✓ |
| Scheduling | ✗ | ✓ |
| Approval Flows | ✗ | ✓ |
| Multi Language | ✗ | ✓ |
| Self Hostable | ✗ | ✓ |
| Audit Logs | ✗ | ✓ |
✓ ToolJet Pros
- Open source
- Many data sources
- Drag-and-drop
- Self-hostable
✗ ToolJet Cons
- Documentation gaps
- Fewer widgets than competitors
- Community-dependent support
✓ 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
ToolJet is built for developers and startups, with a focus on visual-builder and data-sources. Windmill targets developers and devops teams and leads with workflow-editor and script-to-ui.
On pricing, Windmill is the clear winner for budget-conscious users — starting at $10/mo compared to $20/mo for ToolJet. That $10/mo difference adds up quickly for growing teams.
Both offer free plans, so you can test each with your real workflow before committing to a subscription.
Windmill edges out on user ratings (4.4 vs 4.1). While both are well-regarded, that gap reflects real differences in user satisfaction worth considering.
Feature-wise, Windmill offers broader built-in capabilities (7 features vs 6), while ToolJet takes a more focused approach — which can mean a simpler, faster onboarding experience.
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: Windmill has a slight overall edge — but if open source matters most to you, ToolJet may still be the right call.