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Marketing · head to head

Postscript vs Tray.io

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
Tray.io logo

Tray.io

Automation Integration

The intelligent integration platform

From
Free
Rated
-
Full reviewWebsite

The short version

  • Only Tray.io has a free tier, so it costs nothing to try first.
  • Each has a real cost: 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.; 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
  • They diverge on capability: Postscript covers Shopify segmentation, Tray.io covers Low-code workflow builder.
  • Prices and features above were last checked on 31 August 2026.

Where they differ

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

Attributes where Postscript and Tray.io differ
AttributePostscriptTray.io
Starting price$49/monthFree
Pricing modelPer month plus per message sentsubscription
Free tierNoYes
PlatformsWeb, iOSWeb, Api
CategoryMarketingAutomation Integration
FoundedUnknown2015

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 Postscript

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

Only in Tray.io

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

What people use each for

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

Postscript

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

Tray.io

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

Where each one falls short

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

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.

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

Pricing, plan by 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

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

Which should you pick?

Choose Postscript if

  • You need shopify segmentation.
  • You work on Web, iOS.
  • You also want automated flows.
Postscript review

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

Questions people ask

Is Postscript or Tray.io better?
Neither clearly leads. Postscript starts at $49/month and Tray.io at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Postscript or Tray.io?
Tray.io has a free tier; the other does not. Paid plans start at $49/month for Postscript and Free for Tray.io.
Does Postscript or Tray.io run on more platforms?
Postscript runs on Web, iOS. Tray.io runs on Web, Api.
Can I use Tray.io for free?
Yes. Tray.io has a free tier, so you can try it without paying. Postscript starts at $49/month.
What is Postscript best used for?
Postscript is most often used for a shopify direct-to-consumer brand that wants abandoned cart recovery by text rather than another email in an ignored inbox, a brand running a product drop where a timed broadcast to an opted-in list is the whole launch mechanism, a merchant segmenting by past purchase and variant to send replenishment reminders at the right interval, a store on headless shopify or a custom stack that still wants sms built on order data through the sdk. Of those, a shopify direct-to-consumer brand that wants abandoned cart recovery by text rather than another email in an ignored inbox and a brand running a product drop where a timed broadcast to an opted-in list is the whole launch mechanism are not what Tray.io is typically brought in for.
What can Postscript do that Tray.io cannot?
Postscript covers Shopify segmentation, Automated flows, Subscriber acquisition, Two-way conversations. Tray.io covers Low-code workflow builder, API integrations, Webhooks, Conditional logic.

Answered from the vendors’ own pages

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.

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.

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.

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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