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Software · head to head

Census vs Windmill

Census logo

Census

Software

The reverse ETL infrastructure for data activation

From
Free
Rated
-
Full reviewWebsite
Windmill logo

Windmill

Software

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

From
Free
Rated
-
Full reviewWebsite

The short version

  • Each has a real cost: Census census was folded into Fivetran Activations, per the vendor: "Previously, this was called a sync in Census", and its own pricing page redirects to Fivetran pricing rather than showing Census plans; Windmill free self-hosted tier caps SSO users at 10 and workspaces at 3, requiring Enterprise for larger teams.
  • They diverge on capability: Census covers Reverse ETL, Windmill covers Script-to-workflow engine.

Where they differ

Only the attributes on which Census and Windmill actually diverge.

Attributes where Census and Windmill differ
AttributeCensusWindmill
Pricing modelusage-basedopen-source
PlatformsWeb, Apiweb, api, linux, windows, mac
Founded2020Unknown

Identical on both: starting price (Free), free tier (Yes), user rating (Not yet rated), category (Unknown).

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 Census

  • Reverse ETL
  • Data syncing
  • Transformation
  • Real-time activation
  • Error handling
  • Monitoring
  • Analytics
  • 150+ destinations

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.

Census

  • Syncing customer data from a warehouse into marketing and sales tools (reverse ETL)not Windmill

Windmill

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

Where each one falls short

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

Census

  • Census was folded into Fivetran Activations, per the vendor: "Previously, this was called a sync in Census", and its own pricing page redirects to Fivetran pricing rather than showing Census plans
  • Free Fivetran Activations tier caps at 3,500 monthly active rows

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

Census

Free
  • FreeFree
    • Basic syncing
    • Limited destinations
  • Pro$250/month
    • Advanced syncing
    • Email support
  • Enterprise$1500/month
    • Unlimited syncing
    • 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 Census if

  • You need reverse etl.
  • You want to start without paying.
  • You work on Web, Api.
  • You also want data syncing.
Census 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 Census or Windmill better?
Neither clearly leads. Census 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, Census or Windmill?
Census starts at Free and Windmill at Free.
Does Census or Windmill run on more platforms?
Census runs on Web, Api. Windmill runs on web, api, linux, windows, mac.
Can I use Census for free?
Both have a free tier, so you can try either at no cost before committing.
What is Census best used for?
Census is most often used for syncing customer data from a warehouse into marketing and sales tools (reverse etl). Of those, syncing customer data from a warehouse into marketing and sales tools (reverse etl) is not what Windmill is typically brought in for.
What can Census do that Windmill cannot?
Census covers Reverse ETL, Data syncing, Transformation, Real-time activation. Windmill covers Script-to-workflow engine, Auto-generated UIs, Self-hosted deployment, Git sync.

Answered from the vendors’ own pages

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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