Windmill vs Retool: Which is Better in 2026?
Choosing between Windmill and Retool comes down to understanding what each tool does best. This comparison breaks down the key differences so you can make an informed decision based on your specific needs, not marketing claims.
Bottom line: Retool wins this matchup. Creatio is our overall App Builders pick. Zapier Interfaces is our free App Builders pick. Pick Windmill if you need developer tools.
Short on time? Here's the quick answer
Based on published vendor pricing and features and on public review data, here's who should pick what:
Windmill
Open-source developer platform for scripts
Best for you if:
- • You want open source workflow engine
Retool
Build internal tools, apps, and AI with drag-and-drop
Best for you if:
- • You want fast development
| At a Glance | Windmill | Retool |
|---|---|---|
Starts at | Free Free plan | Free Free plan |
Category | Developer Tools App Builders | App Builders Internal Tools |
Rating | n/a | 4.6/5 G2 4.6 · Capterra 4.5 394 reviews |
Free plan | Yes | Yes |
Watch out for | n/a | Workflow runs capped at 500/mo (Free) or 5,000/mo (Team), automation-heavy apps hit limits quickly |
Choose Windmill or Retool?
Choose Windmill if
- You want open source workflow engine
- You want scripts and flows
- You work in developer tools, not app builders
Choose Retool if
- You want fast development
- You want many integrations
- You work in app builders, not developer tools
In-Depth Analysis
Windmill
Open-source developer platform for scripts
Windmill's pricing is very generous, offering a fully functional self-hosted Free tier.
Strengths
- Pro: Open source workflow engine
- Pro: Scripts and flows
- Pro: Self-hostable
- Pro: Good UI
- Pro: Active development
Weaknesses
- Con: Learning curve
- Con: Documentation improving
- Con: Smaller community
- Con: Enterprise features limited
- Con: Setup complexity
Key features
Retool
Build internal tools, apps, and AI with drag-and-drop
Retool is the most polished internal tool builder but pricing escalates quickly.
Watch out
Workflow runs capped at 500/mo (Free) or 5,000/mo (Team), automation-heavy apps hit limits quickly
Strengths
- Pro: Fast development
- Pro: Many integrations
- Pro: Powerful for internal tools
Weaknesses
- Con: Internal tools only
- Con: Can get expensive
Key features
Pricing: Windmill vs Retool
| Plan | Windmill | Retool |
|---|---|---|
| Tier 1 | N/A | $0 Free |
| Tier 2 | N/A | $9/user/month Team |
| Tier 3 | N/A | $46/user/month Business |
| Tier 4 | N/A | Custom Enterprise |
Pricing verified from each vendor's public pricing page. Compare in detail on Windmill pricing and Retool pricing.
Key Takeaways
Retool
- Free tier available
- Our pick for this comparison
Windmill
- Better fit for developer tools
The Bottom Line
Retool wins this matchup. Creatio is our overall App Builders pick. Zapier Interfaces is our free App Builders pick.
Frequently Asked Questions
Is Windmill or Retool better in 2026?
Retool wins this matchup. Creatio is our overall App Builders pick. Zapier Interfaces is our free App Builders pick. Pick Windmill for developer tools workflows (main strength: open source workflow engine). Pick Retool for app builders workflows (main strength: fast development).
What are Windmill and Retool used for?
Windmill: Open-source developer platform for scripts. Retool: Build internal tools, apps, and AI with drag-and-drop.
What does Windmill cost vs Retool?
Windmill pricing is on their site. Retool's paid plans start at Free (Team).
What's the main difference between Windmill and Retool?
Windmill's main strength: open source workflow engine. Retool's main strength: fast development.