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Automation Integration · head to head

Tray.io vs Windmill

Tray.io logo

Tray.io

Automation Integration

The intelligent integration 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: Tray.io now rebranded Tray.ai; pricing page names three tiers, Pro (3 workspaces, 7 day insights), Team (20 workspaces, 30 day insights) and Enterprise (unlimited workspaces, 180 day insights, SSO, HIPAA), but publishes no figures and requires a demo or sales call for a quote; Windmill free self-hosted tier caps SSO users at 10 and workspaces at 3, requiring Enterprise for larger teams.
  • They diverge on capability: Tray.io covers Low-code workflow builder, Windmill covers Script-to-workflow engine.
  • Prices and features above were last checked on 30 August 2026.

Where they differ

Only the attributes on which Tray.io and Windmill actually diverge.

Attributes where Tray.io and Windmill differ
AttributeTray.ioWindmill
Pricing modelsubscriptionopen-source
PlatformsWeb, Apiweb, api, linux, windows, mac
Founded2015Unknown

Identical on both: starting price (Free), free tier (Yes), 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 Tray.io

  • Low-code workflow builder
  • API integrations
  • Webhooks
  • Conditional logic
  • Error handling
  • Rate limiting
  • Data transformation
  • Authentication

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.

Tray.io

  • 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 Tray.io
  • Building internal tools from existing Python/TypeScript codenot Tray.io
  • Self-hosted automation for engineering teamsnot Tray.io
  • Orchestrating multi-language workflowsnot Tray.io

Where each one falls short

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

Tray.io

  • Now rebranded Tray.ai; pricing page names three tiers, Pro (3 workspaces, 7 day insights), Team (20 workspaces, 30 day insights) and Enterprise (unlimited workspaces, 180 day insights, SSO, HIPAA), but publishes no figures and requires a demo or sales call for a quote

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

Tray.io

Free
  • Starter$50/month
    • 20 workflows
    • 50 integrations
    • Community support
  • Professional$150/month
    • Unlimited workflows
    • 500+ integrations
    • Email support
  • Enterprise$500/month
    • Custom workflows
    • Dedicated support
    • Advanced security

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 Tray.io if

  • You need low-code workflow builder.
  • You want to start without paying.
  • You work on Web, Api.
  • You also want api integrations.
Tray.io 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 Tray.io or Windmill better?
Neither clearly leads. Tray.io 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, Tray.io or Windmill?
Tray.io starts at Free and Windmill at Free.
Does Tray.io or Windmill run on more platforms?
Tray.io runs on Web, Api. Windmill runs on web, api, linux, windows, mac.
Can I use Tray.io for free?
Both have a free tier, so you can try either at no cost before committing.
What is Tray.io best used for?
Tray.io 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 Tray.io do that Windmill cannot?
Tray.io covers Low-code workflow builder, API integrations, Webhooks, Conditional logic. 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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