Windmill

Open-source, self-hostable with unlimited executions on the free tier

What Windmill does

  • Open-source, self-hostable with unlimited executions on the free tier
  • Turns scripts (Python/TS/Go/Bash/SQL) into flows and full internal apps
  • Kubernetes/Docker/Fargate deployable with a hybrid seat+compute enterprise pricing model

Windmill — straight answers

What is Windmill?

Windmill is listed under Workflow Automation, in the AI Agents & Automation category on Flocci AI Tools. Open-source, self-hostable with unlimited executions on the free tier. It is free, with no paid plan attached, and it lives at windmill.dev.

Is Windmill free?

Windmill is listed as fully free — there is no paid tier attached to it in the catalog. That makes it one of the 396 entries on Flocci AI Tools with no upgrade path built in.

Can I use Windmill in a browser, or is there an app?

Windmill works in a normal browser tab with no install. It is available on the web, self-hosting and the command line.

What can Windmill do?

Windmill does 3 things the catalog singles out: Open-source, self-hostable with unlimited executions on the free tier; turns scripts (python/ts/go/bash/sql) into flows and full internal apps; kubernetes/docker/fargate deployable with a hybrid seat+compute enterprise pricing model.

What is the best free alternative to Windmill?

Flowise is the closest free alternative: it sits in the same Workflow Automation sub-category and is free. Google Opal, LangBot and Langflow also start free. The full list is on the alternatives page.

See the full list →

Windmill alternatives

Compare all alternatives →

Zapier

Workflow Automation
freemium
  • Connect 8,000+ apps with AI agents
  • Natural-language automation builder
  • AI steps, chatbots and tables
  • Free tier for basic Zaps

n8n

Workflow Automation
freemium
  • Open-source, self-hostable automation
  • Visual AI-agent and LLM nodes
  • Full code when you need it
  • Free to run yourself

Make

Workflow Automation
freemium
  • Visual drag-and-drop automation
  • AI modules and agent scenarios
  • 1,000+ app integrations
  • Generous free tier

Lindy

Workflow Automation
trial
  • Build AI 'employees' from plain English
  • Handles email, scheduling and CRM tasks
  • Trigger-based autonomous workflows
  • The free plan has ended; only paid plans with a short trial remain.

Gumloop

Workflow Automation
freemium
  • No-code canvas for AI workflows
  • Web scraping, extraction and enrichment
  • Shareable automation templates
  • Free plan to start

Coze

Workflow Automation
freemium
  • No-code drag-and-drop bot/agent builder from ByteDance, distinct from Doubao's consumer chat app
  • 60+ built-in plugins (search, travel, productivity) wired into published bots
  • One-click publish to Telegram, Discord, Slack or your own site

Head-to-head comparisons