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Developer Tools · head to head

Moonrepo vs Windmill

Moonrepo logo

Moonrepo

Developer Tools

Monorepo build system and version manager platform

From
Free
Rated
-
Full reviewWebsite
Windmill logo

Windmill

Automation Integration

Open-source developer platform for building scripts, workflows, and internal apps

From
Free
Rated
-
Full reviewWebsite

The short version

  • Each has a real cost: Moonrepo smaller community compared to established build systems like Bazel; Windmill free self-hosted tier caps SSO users at 10 and workspaces at 3, requiring Enterprise for larger teams.
  • They diverge on capability: Moonrepo covers Task orchestration, Windmill covers Script-to-workflow engine.
  • Prices and features above were last checked on 29 August 2026.

Where they differ

Only the attributes on which Moonrepo and Windmill actually diverge.

Attributes where Moonrepo and Windmill differ
AttributeMoonrepoWindmill
PlatformsWeb, CLIweb, api, linux, windows, mac
CategoryDeveloper ToolsAutomation Integration

Identical on both: starting price (Free), pricing model (open-source), free tier (Yes), user rating (Not yet rated).

What each one covers

Drawn from each product's published feature list. An absence here means we hold no record of it - not that the product lacks it.

Only in Moonrepo

  • Task orchestration
  • Smart hashing
  • Dependency analysis
  • Multi-language version management
  • Contextual detection
  • Integrated development environment
  • Git integration

Only in Windmill

  • Script-to-workflow engine
  • Auto-generated UIs
  • Self-hosted deployment
  • Git sync
  • SSO support
  • Audit logs

What people use each for

The jobs each tool is most often brought in to do.

Moonrepo

  • Managing multiple language projects in a single repositorynot Windmill
  • Automating developer environment setup with consistent toolchain versionsnot Windmill
  • Optimizing monorepo builds with intelligent task cachingnot Windmill
  • Enforcing consistent development practices across distributed teamsnot Windmill

Windmill

  • Turning ad-hoc scripts into scheduled jobs and APIsnot Moonrepo
  • Building internal tools from existing Python/TypeScript codenot Moonrepo
  • Self-hosted automation for engineering teamsnot Moonrepo
  • Orchestrating multi-language workflowsnot Moonrepo

Where each one falls short

Documented limitations, not opinions. Every one is a constraint you would hit in normal use.

Moonrepo

  • Smaller community compared to established build systems like Bazel
  • Limited integrations with enterprise CI/CD platforms
  • Documentation gaps in some advanced use cases
  • No commercial support option for organizations requiring guaranteed SLAs

Windmill

  • Free self-hosted tier caps SSO users at 10 and workspaces at 3, requiring Enterprise for larger teams.
  • Compute unit and seat-based pricing (developer vs. operator seats, worker compute units) adds pricing complexity beyond a flat monthly fee.
  • Email triggers are capped at 100/day on the free tier, limiting event-driven use cases without upgrading.
  • Smaller ecosystem of pre-built integrations compared to more established automation tools like n8n.

Pricing, plan by plan

Moonrepo

Free

No published plan breakdown. See the Moonrepo review.

Windmill

Free
  • Free / Open-sourceFree
    • Unlimited executions
    • Self-hosted deployment
    • Max 10 users with SSO
  • Enterprise$120/month
    • Unlimited executions and workspaces
    • Uncapped SSO seats
    • 24/7 priority support (3-hour response)

Which should you pick?

Choose Moonrepo if

  • You need task orchestration.
  • You want to start without paying.
  • You work on Web, CLI.
  • You also want smart hashing.
Moonrepo review

Choose Windmill if

  • You need script-to-workflow engine.
  • You want to start without paying.
  • You work on web, api, linux, windows, mac.
  • You also want auto-generated uis.
Windmill review

Questions people ask

Is Moonrepo or Windmill better?
Neither clearly leads. Moonrepo starts at Free and Windmill at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Moonrepo or Windmill?
Moonrepo starts at Free and Windmill at Free.
Does Moonrepo or Windmill run on more platforms?
Moonrepo runs on Web, CLI. Windmill runs on web, api, linux, windows, mac.
Can I use Moonrepo for free?
Both have a free tier, so you can try either at no cost before committing.
What is Moonrepo best used for?
Moonrepo is most often used for managing multiple language projects in a single repository, automating developer environment setup with consistent toolchain versions, optimizing monorepo builds with intelligent task caching, enforcing consistent development practices across distributed teams. Of those, managing multiple language projects in a single repository and automating developer environment setup with consistent toolchain versions are not what Windmill is typically brought in for.
What can Moonrepo do that Windmill cannot?
Moonrepo covers Task orchestration, Smart hashing, Dependency analysis, Multi-language version management. Windmill covers Script-to-workflow engine, Auto-generated UIs, Self-hosted deployment, Git sync.

Answered from the vendors’ own pages

Moonrepo: What programming languages does Moonrepo support?

Moonrepo's proto version manager supports Node.js, Python, Go, Rust, Deno, Java, Ruby, and other languages, with the build system moon supporting most modern development stacks.

Source
Windmill: What does Windmill cost?

Windmill's Free and Open-source edition is $0/month for self-hosted use with unlimited executions, while Enterprise starts at $120/month with unlimited workspaces and uncapped SSO seats, priced further by developer/operator seats and compute units.

Source
Moonrepo: Is Moonrepo suitable for large monorepos?

Yes, Moonrepo is designed to scale to monorepos of any size with intelligent caching and task orchestration to maintain build performance.

Source
Windmill: Is there a free plan and what are its limits?

The free self-hosted plan supports unlimited executions but caps SSO at 10 users, workspaces at 3, groups/permissions at 4, and email triggers at 100 per day.

Source
Moonrepo: Can I use just moon or just proto separately?

Yes, moon and proto are independent tools that can be adopted separately or together to address specific team needs.

Source
Windmill: How is usage metered on Windmill Enterprise?

Enterprise usage is metered through seats (developer seats at $20/month, operator seats at $10/month) and compute units, e.g. $100/month for 2 standard-worker compute units.

Source
Windmill: What happens to a self-hosted Windmill deployment if the company shuts down?

The pricing page addresses this directly as an FAQ topic, noting that self-hosted applications built on the open-source edition can continue running independently of Windmill the company.

Source
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