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Automation Integration · head to head

Microsoft Power Automate vs Postscript

Microsoft Power Automate logo

Microsoft Power Automate

Automation Integration

Automate tasks across cloud and on-premises apps

From
Free
Rated
-
Full reviewWebsite
Postscript logo

Postscript

Marketing

SMS marketing built for Shopify merchants, with carrier fees billed on top of message rates

From
$49/month
Rated
-
Full reviewWebsite

The short version

  • Only Microsoft Power Automate has a free tier, so it costs nothing to try first.
  • Each has a real cost: Microsoft Power Automate free plan limited to 750 flow runs/month and standard connectors only; premium connectors require paid plans; Postscript carrier pass-through fees are billed on top of the per-message rate, roughly $0.00418 per SMS and $0.00841 per MMS in the United States, and are routinely missing from the cost comparisons buyers build.
  • They diverge on capability: Microsoft Power Automate covers Instant flows, Postscript covers Shopify segmentation.
  • Prices and features above were last checked on 31 August 2026.

Where they differ

Only the attributes on which Microsoft Power Automate and Postscript actually diverge.

Attributes where Microsoft Power Automate and Postscript differ
AttributeMicrosoft Power AutomatePostscript
Starting priceFree$49/month
Pricing modelUnknownPer month plus per message sent
Free tierYesNo
PlatformsWeb, Cloud, DesktopWeb, iOS
CategoryAutomation IntegrationMarketing
Founded2016Unknown

Identical on both: 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 Microsoft Power Automate

  • Instant flows
  • Scheduled flows
  • Desktop automation
  • Process mining
  • Business process flows
  • Approval workflows
  • 500+ connectors
  • Microsoft 365

Only in Postscript

  • Shopify segmentation
  • Subscriber acquisition
  • Two-way conversations
  • MMS campaigns
  • Revenue attribution
  • Headless SDK
  • Usage-based tiers

Both cover

  • Automated flows

What people use each for

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

Microsoft Power Automate

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

Postscript

  • A Shopify direct-to-consumer brand that wants abandoned cart recovery by text rather than another email in an ignored inboxnot Microsoft Power Automate
  • A brand running a product drop where a timed broadcast to an opted-in list is the whole launch mechanismnot Microsoft Power Automate
  • A merchant segmenting by past purchase and variant to send replenishment reminders at the right intervalnot Microsoft Power Automate
  • A store on headless Shopify or a custom stack that still wants SMS built on order data through the SDKnot Microsoft Power Automate

Where each one falls short

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

Microsoft Power Automate

  • Free plan limited to 750 flow runs/month and standard connectors only; premium connectors require paid plans
  • Not suitable for long-running workflows; can fail unexpectedly without warning
  • Limited to simple linear logic; fails with complex workflows involving multiple stakeholders
  • Tasks cannot automate at scale when requiring more than approximately 60 users

Postscript

  • Carrier pass-through fees are billed on top of the per-message rate, roughly $0.00418 per SMS and $0.00841 per MMS in the United States, and are routinely missing from the cost comparisons buyers build.
  • The cheapest per-message rates require the $500 a month plan, so a small sender pays more than double the headline low rate per text.
  • The $0 Starter plan carries a $49 minimum monthly spend, so it is not a free tier and quiet months still generate a bill.
  • US SMS marketing carries real legal exposure under consent, quiet hours and carrier registration rules, and the compliance obligation sits with the merchant, not the platform.
  • It is SMS and MMS only, so email, push and on-site messaging live in a separate tool and audience suppression between the two has to be managed across systems.

Pricing, plan by plan

Microsoft Power Automate

Free
  • FreeFree
    • 750 flow runs/month
    • Standard connectors only
    • Basic cloud flows
  • Premium$15/user/month
    • Cloud flows (DPA)
    • Attended RPA
    • 250 MB Dataverse database
  • Process$150/bot/month
    • Unattended automation
    • Cloud and desktop flows
    • 50 MB Dataverse database
  • Hosted Process$215/bot/month
    • Microsoft-managed virtual machine
    • Unattended automation
    • Same Dataverse entitlements as Process plan

Postscript

$49/month
  • Starter$49/month
    • $0 base fee but a $49 minimum monthly spend
    • SMS at $0.015 and MMS at $0.045 per message
    • Campaigns, automations, acquisition tools and analytics
  • Growth$100/month
    • Lower per-message rates than Starter
    • Full campaign and automation feature set
    • No contract required
  • Professional$500/month
    • Rates falling towards $0.007 SMS and $0.024 MMS
    • Suited to high-volume senders
    • Upgrade or downgrade at any time
  • Enterprise$undefined/month
    • Custom pricing on a contract
    • Negotiated message rates and support terms

Which should you pick?

Choose Microsoft Power Automate if

  • You need instant flows.
  • You want to start without paying.
  • You work on Web, Cloud, Desktop.
  • You also want scheduled flows.
Microsoft Power Automate review

Choose Postscript if

  • You need shopify segmentation.
  • You work on Web, iOS.
  • You also want subscriber acquisition.
Postscript review

Questions people ask

Is Microsoft Power Automate or Postscript better?
Neither clearly leads. Microsoft Power Automate starts at Free and Postscript at $49/month, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Microsoft Power Automate or Postscript?
Microsoft Power Automate has a free tier; the other does not. Paid plans start at Free for Microsoft Power Automate and $49/month for Postscript.
Does Microsoft Power Automate or Postscript run on more platforms?
Microsoft Power Automate runs on Web, Cloud, Desktop. Postscript runs on Web, iOS.
Can I use Microsoft Power Automate for free?
Yes. Microsoft Power Automate has a free tier, so you can try it without paying. Postscript starts at $49/month.
What is Microsoft Power Automate best used for?
Microsoft Power Automate is most often used for workflow automation, data integration, process automation, app integration. Of those, workflow automation and data integration are not what Postscript is typically brought in for.
What can Microsoft Power Automate do that Postscript cannot?
Microsoft Power Automate covers Instant flows, Scheduled flows, Desktop automation, Process mining. Postscript covers Shopify segmentation, Subscriber acquisition, Two-way conversations, MMS campaigns. Both handle Automated flows.

Answered from the vendors’ own pages

Microsoft Power Automate: Is Power Automate included with Microsoft 365?

Yes. If you have an eligible Microsoft 365 subscription, you can use Power Automate at no extra cost for flows relying only on standard connectors (SharePoint, Outlook, Teams). Premium connectors (Salesforce, SAP, Oracle) require paid plans.

Source
Postscript: Is Postscript only for Shopify?

It is built for Shopify and that is where its segmentation advantage lies, but headless and non-Shopify stores are supported through an SDK with more setup work.

Microsoft Power Automate: How many flow runs are allowed on the free plan?

Power Automate's free tier (included with Microsoft 365) is limited to 750 flow runs per month and standard connectors only. Out of 900+ total connectors, the free plan only includes Microsoft ecosystem apps and limited third-party apps.

Source
Postscript: What is the real cost per text?

The plan rate plus carrier fees. On Starter that is about $0.015 plus roughly $0.00418 in US carrier fees per SMS, so budget close to two cents a message before discounts.

Microsoft Power Automate: What's the difference between Premium and Process plans?

Premium ($15/user/month) provides attended automation with cloud flows and standard RPA. Process plan ($150/bot/month) enables unattended automation where bots run without human intervention on virtual machines for high-volume, repetitive tasks.

Source
Postscript: Is the Starter plan free?

No. The base fee is $0 but there is a $49 minimum monthly spend, so it functions as a $49 floor.

Microsoft Power Automate: Does Power Automate support long-running workflows?

No. Power Automate is not suitable for long-lasting workflows because they can run without warning and fail unexpectedly. The platform is built for linear, branching logic (if-then) rather than complex, multi-step business processes involving multiple stakeholders.

Source
Postscript: Do I need a contract?

No. Contracts are offered but not required, and plans can be moved up or down at any time under usage-based billing.

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