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Automation Integration · head to head

Blue Prism vs Windmill

Blue Prism logo

Blue Prism

Automation Integration

The digital exchange for intelligent automation

From
$1000/month
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

  • Only Windmill has a free tier, so it costs nothing to try first.
  • Each has a real cost: Blue Prism no pricing displayed on the vendor homepage; Windmill free self-hosted tier caps SSO users at 10 and workspaces at 3, requiring Enterprise for larger teams.
  • They diverge on capability: Blue Prism covers RPA platform, Windmill covers Script-to-workflow engine.

Where they differ

Only the attributes on which Blue Prism and Windmill actually diverge.

Attributes where Blue Prism and Windmill differ
AttributeBlue PrismWindmill
Starting price$1000/monthFree
Pricing modelsubscriptionopen-source
Free tierNoYes
PlatformsWeb, Desktopweb, api, linux, windows, mac
Founded2001Unknown

Identical on both: user rating (Not yet rated), category (Automation Integration).

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 Blue Prism

  • RPA platform
  • Intelligent automation
  • Robotic workers
  • Process intelligence
  • Monitoring
  • Analytics
  • Scalability
  • 100+ connectors

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.

Blue Prism

  • Workflow Automationnot Windmill
  • Data Integrationnot Windmill
  • Process Automationnot Windmill
  • App Integrationnot Windmill
  • API Connectivitynot Windmill

Windmill

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

Where each one falls short

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

Blue Prism

  • No pricing displayed on the vendor homepage
  • Enterprise automation platform typically requires custom pricing and implementation agreements

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

Blue Prism

$1000/month
  • Starter$1000/month
    • 1 bot
    • Basic features
  • Professional$3000/month
    • 5 bots
    • Advanced features
  • Enterprise$10000/month
    • Unlimited bots
    • Dedicated support

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 Blue Prism if

  • You need rpa platform.
  • You work on Web, Desktop.
  • You also want intelligent automation.
Blue Prism 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 Blue Prism or Windmill better?
Neither clearly leads. Blue Prism starts at $1000/month and Windmill at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Blue Prism or Windmill?
Windmill has a free tier; the other does not. Paid plans start at $1000/month for Blue Prism and Free for Windmill.
Does Blue Prism or Windmill run on more platforms?
Blue Prism runs on Web, Desktop. Windmill runs on web, api, linux, windows, mac.
Can I use Windmill for free?
Yes. Windmill has a free tier, so you can try it without paying. Blue Prism starts at $1000/month.
What is Blue Prism best used for?
Blue Prism is most often used for workflow automation, data integration, process automation, app integration. Of those, workflow automation and data integration are not what Windmill is typically brought in for.
What can Blue Prism do that Windmill cannot?
Blue Prism covers RPA platform, Intelligent automation, Robotic workers, Process intelligence. Windmill covers Script-to-workflow engine, Auto-generated UIs, Self-hosted deployment, Git sync.

Answered from the vendors’ own pages

Blue Prism: How much does SS&C Blue Prism cost?

SS&C Blue Prism does not publish pricing on their website. Platform pricing is customized based on deployment requirements, number of users, and selected modules. Organizations should contact their sales team or schedule a free trial to discuss pricing.

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
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
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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