Windmill
Turn scripts into workflows and UIs.
In short
- What it is: Automation, 10k+ GitHub stars, licensed AGPL.
- Replaces: Zapier — around $828/year saved.
- Installed for: $199 on your own server — you own it, no monthly platform fee.
- Licence: AGPL. AGPL obligations apply — self-host is fine; comply if offered as a service.
$828
replaces per year
$4,140
saved over 5 years
$199
one-time install (yours forever)
48h
delivery
Windmill vs the tools it replaces.
| Feature | Commercial tool | Windmill (self-hosted) |
|---|---|---|
| Monthly cost | $69/mo | Your compute only |
| Branding | Vendor brand | See licence |
| Data | Vendor-hosted | On your server |
| Licence | Proprietary | AGPL |
Replaces
- Zapier — ~$69/mo
Licence posture
AGPL. AGPL obligations apply. Self-hosting is fine; comply if you offer it as a service, or buy a commercial licence.
AGPL obligations apply — self-host is fine; comply if offered as a service.
Turn it into a business.
Self-host for a client's internal use and charge for the install. If you modify and offer it as a network service, comply with AGPL — or buy a commercial licence.
Best for
Install difficulty
medium
The install, step by step.
Provision VPS + Docker
Configure secrets + provider keys
Database + storage setup
Branding + domain
HTTPS + backups
Smoke test + handover
Watch a Windmill install.
We generate an architecture diagram of the repo and walk through the deployment. Enter your name and email to unlock the demo.
Install Windmill — $199.
Flat fee, delivered in 24–48 hours, on your own server, with HTTPS, backups and the AI keys wired.
Windmill: common questions
What does Windmill replace?
Zapier — about $828 a year in subscriptions you stop paying.
How much does it cost to run Windmill?
No licence fee — it ships under AGPL. You pay only for your own server and any model/API keys. We install, harden and hand it over for a one-time $199.
Can I white-label and resell Windmill?
AGPL obligations apply. Self-hosting is fine; comply if you offer it as a service, or buy a commercial licence. AGPL obligations apply — self-host is fine; comply if offered as a service.
How hard is the install, and how long does it take?
We rate it medium. Delivered in 24–48 hours on your own server, with HTTPS, backups and the AI keys wired.
What do I actually own after installing Windmill?
The running app, your data and the brand. No monthly platform fee and no per-seat pricing — you own it outright.
Other repos people install with Windmill.
n8n
Workflow automation with 400+ integrations and native AI agent nodes.
Sustainable Use Licence · 199k+★
AutomationActivepieces
An open-source Zapier alternative with AI steps.
MIT · 13k+★
AutomationTrigger.dev
Background jobs and workflows for developers.
Apache-2.0 · 10k+★
AutomationTemporal
Durable execution for reliable workflows.
MIT · 12k+★
AutomationAirflow
The workflow orchestrator standard.
Apache-2.0 · 37k+★
AutomationPrefect
Modern workflow orchestration in Python.
Apache-2.0 · 17k+★