What is the best open-source alternative to Retool?

Windmill is currently the top self-hosted open-source alternative to Retool with over 0 GitHub stars. It requires 2 GB RAM.

How much can I save by replacing Retool with a self-hosted tool?

By switching from Retool ($50.00/month) to a self-hosted VPS ($5.00/month), you can save approximately $1,620.00 over a 3-year period.

Can I host Retool alternatives on a cheap VPS?

Yes, most open-source alternatives can easily run via Docker Compose on standard cloud servers from Hostinger, Hetzner, or DigitalOcean starting at $4-$6 per month.

Data Sovereignty • Zero Vendor Lock-in • Cut Subscriptions

Top 1 Open-Source Retool Alternatives to Self-Host (2026)

Commercial cloud solution with per-user monthly subscription fees. Rather than paying $50.00/month, deploy these battle-tested self-hosted alternatives with full privacy and unlimited usage.

Commercial Price: $50.00/mo • Self-Hosted VPS: $5.00/mo

💸 3-Year Cost Savings Calculator

36 Months Analysis

See how much your organization saves over a 3-year hardware lifecycle by hosting an open-source alternative on a single cloud VPS instead of paying monthly seat licenses.

Team Size / Seats:

1 Solo User 10 Team 25 Enterprise

3-Yr Retool Fee

3-Yr Cloud VPS Fee

$5.00/month flat

Total 3-Yr Savings

Net ROI Profit

Ready to deploy on a high-speed $5/month cloud server? Deploy on VPS ($5.49/mo) →

Recommended Open-Source Retool Replacements

Windmill

automation

windmill-labs/windmill

⭐ 0

Windmill turns scripts into internal tools, workflows, and automated jobs with auto-generated UIs. A blazing-fast, open-source alternative to Retool and Airplane.

Min Memory

2 GB

CPU Cores

2 Core

Storage

25 GB

License

FOSS

Deploy Windmill with Docker Compose Visit Website

Frequently Asked Questions

Commercial platforms like Retool charge monthly subscription fees, enforce arbitrary usage caps, and retain access to your private company data. Self-hosting provides complete privacy, infinite scaling without seat fees, and zero vendor lock-in.

Using modern containerization with Docker Compose, spinning up these applications takes less than 5 minutes. You copy our pre-tested compose file, paste it onto your VPS, and run docker compose up -d.

A standard 2GB to 4GB RAM cloud VPS (costing ~$5/month from Hostinger or Hetzner) easily runs Retool alternatives like Windmill alongside automated daily backups.