OutSystems
Windmill
| Feature | OutSystems | Windmill |
|---|---|---|
| Pricing | Free only | Free / from $10/mo |
| Free Plan | ✓ Yes | ✓ Yes |
| Rating | 4.3 / 5 | 4.4 / 5 |
| Best For | enterprises, it-departments, digital-transformation, large-organizations | developers, devops-teams, internal-tools, data-pipelines |
| Founded | 2001 | 2022 |
| Visual Development | ✓ | ✗ |
| Ai Assistant | ✓ | ✗ |
| Full Stack | ✓ | ✗ |
| Cloud Native | ✓ | ✗ |
| Devops Built In | ✓ | ✗ |
| Security Compliance | ✓ | ✗ |
| Integration Hub | ✓ | ✗ |
| Workflow Editor | ✗ | ✓ |
| Script To Ui | ✗ | ✓ |
| Scheduling | ✗ | ✓ |
| Approval Flows | ✗ | ✓ |
| Multi Language | ✗ | ✓ |
| Self Hostable | ✗ | ✓ |
| Audit Logs | ✗ | ✓ |
✓ OutSystems Pros
- Enterprise-grade security and compliance
- Full-stack development with visual tools
- AI-powered development assistant (AI Mentor)
- Strong performance and scalability
✗ OutSystems Cons
- Expensive enterprise pricing
- Vendor lock-in concerns
- Requires training to use effectively
✓ 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
OutSystems is built for enterprises and it departments, with a focus on visual-development and ai-assistant. Windmill targets developers and devops teams and leads with workflow-editor and script-to-ui.
OutSystems uses custom enterprise pricing, while Windmill starts at $10/mo — a tangible advantage for teams with a fixed budget.
Both offer free plans, so you can test each with your real workflow before committing to a subscription.
This is a genuinely close comparison. If you can, sign up for both free trials (where available) and run a one-week test with your actual team tasks before deciding.