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Automation Integration · head to head

IBM MQ vs Windmill

IBM MQ logo

IBM MQ

Automation Integration

Transactional message queuing for systems where a lost message is a lost payment

From
$312/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: IBM MQ virtual Processor Core licensing is capacity-based, so an over-provisioned server is charged for cores the queue manager never uses, and consumption ratios differ between MQ and MQ Advanced.; Windmill free self-hosted tier caps SSO users at 10 and workspaces at 3, requiring Enterprise for larger teams.
  • They diverge on capability: IBM MQ covers Assured once-only delivery, Windmill covers Script-to-workflow engine.
  • Prices and features above were last checked on 31 August 2026.

Where they differ

Only the attributes on which IBM MQ and Windmill actually diverge.

Attributes where IBM MQ and Windmill differ
AttributeIBM MQWindmill
Starting price$312/monthFree
Pricing modelPer virtual processor core per monthopen-source
Free tierNoYes
PlatformsLinux, Windows, Docker, Kubernetesweb, api, linux, windows, mac

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 IBM MQ

  • Assured once-only delivery
  • Multi-platform queue managers
  • Native high availability
  • Advanced Message Security
  • Managed File Transfer
  • MQ Telemetry

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.

IBM MQ

  • Core banking or payments where a message must participate in the same transaction as a database updatenot Windmill
  • A mainframe estate that needs reliable messaging between z/OS applications and distributed Linux servicesnot Windmill
  • Regulated file movement that must be auditable end to end, using Managed File Transfernot Windmill
  • Replacing bespoke retry and idempotency code in inter-system integrations with a queue that guarantees once-only deliverynot Windmill

Windmill

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

Where each one falls short

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

IBM MQ

  • Virtual Processor Core licensing is capacity-based, so an over-provisioned server is charged for cores the queue manager never uses, and consumption ratios differ between MQ and MQ Advanced.
  • Container licensing requires Kubernetes with the IBM License Service, so Podman or plain Docker deployments cannot use the optimised metric and pay materially more.
  • Distributed and z/OS platforms use different licensing models, and organisations running both routinely misapply one to the other, which surfaces as exposure at audit.
  • Operating MQ needs specialist skills that are increasingly scarce, and the pool of engineers who understand channel and queue manager administration is shrinking with every retirement.
  • IBM’s acquisition of Confluent in March 2026 puts MQ and Kafka under one vendor, which resolves the integration story but removes the competitive tension that kept renewal negotiations honest.

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

IBM MQ

$312/month
  • IBM MQ$312/month
    • Per Virtual Processor Core subscription
    • Minimum one year term
    • Assured once-only delivery
  • IBM MQ Advanced$583/month
    • Per Virtual Processor Core subscription
    • Advanced Message Security
    • Managed File Transfer
  • Pay as you go$undefined/month
    • Approximately 1.02 USD per Virtual Processor Core per hour
    • No annual commitment
    • Suited to variable or short-lived capacity

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 IBM MQ if

  • You need assured once-only delivery.
  • You work on Linux, Windows, Docker, Kubernetes.
  • You also want multi-platform queue managers.
IBM MQ 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 IBM MQ or Windmill better?
Neither clearly leads. IBM MQ starts at $312/month and Windmill at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, IBM MQ or Windmill?
Windmill has a free tier; the other does not. Paid plans start at $312/month for IBM MQ and Free for Windmill.
Does IBM MQ or Windmill run on more platforms?
IBM MQ runs on Linux, Windows, Docker, Kubernetes. 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. IBM MQ starts at $312/month.
What is IBM MQ best used for?
IBM MQ is most often used for core banking or payments where a message must participate in the same transaction as a database update, a mainframe estate that needs reliable messaging between z/os applications and distributed linux services, regulated file movement that must be auditable end to end, using managed file transfer, replacing bespoke retry and idempotency code in inter-system integrations with a queue that guarantees once-only delivery. Of those, core banking or payments where a message must participate in the same transaction as a database update and a mainframe estate that needs reliable messaging between z/os applications and distributed linux services are not what Windmill is typically brought in for.
What can IBM MQ do that Windmill cannot?
IBM MQ covers Assured once-only delivery, Multi-platform queue managers, Native high availability, Advanced Message Security. Windmill covers Script-to-workflow engine, Auto-generated UIs, Self-hosted deployment, Git sync.

Answered from the vendors’ own pages

IBM MQ: How is IBM MQ licensed?

By Virtual Processor Core subscription, around 312 US dollars per VPC per month for MQ and 583 for MQ Advanced, minimum one year.

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
IBM MQ: Should we replace MQ with Kafka?

Only if you actually need a replayable log. MQ is a transactional queue; replacing it with Kafka usually means rebuilding transactional semantics in application code.

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
IBM MQ: What does MQ Advanced add?

Advanced Message Security, Managed File Transfer, MQTT telemetry and quorum-based high availability.

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
IBM MQ: Does container deployment change the cost?

Yes. Optimised container licensing needs Kubernetes with the IBM License Service; Podman or Docker deployments do not qualify.

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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