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Postscript SMS

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Transform your SMS strategy with AI that learns, adapts, and generates higher ROI for Shopify brands.

E-commerceSMS MarketingMarketing AutomationAI Assistants
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Reviews onG2
161 reviews tracked

The Bottom Line

Entry price

Free plan available, paid tiers above

Biggest pro

Deep integration with Shopify ecosystem

Biggest con

Primarily focused on Shopify, may not be suitable for other e-commerce platforms

TL;DR - Postscript SMS

  • AI-powered SMS marketing platform for Shopify brands.
  • Optimizes message performance and drives revenue with features like Infinity Testing and AI Shopper.
  • Offers rapid list growth tools, advanced segmentation, and robust compliance management.
Pricing: Free plan available
Best for: Growing teams
4.8/5 across review platforms

What is Postscript SMS?

Editorial review
Postscript is an SMS marketing and sales platform specifically designed for Shopify brands, aiming to make SMS their top revenue-generating channel. It focuses on maximizing return on investment through advanced features like AI-powered message optimization, rapid list growth tools, and comprehensive compliance management. The platform integrates deeply within the Shopify ecosystem, offering tools for subscriber acquisition, targeted messaging, and conversational commerce. The core of Postscript's offering revolves around its AI suite, which includes Brand Center for maintaining brand voice, Infinity Testing for optimizing message variants at scale, and Shopper, an AI-powered shopping assistant for 1:1 customer conversations. It also provides robust features for list growth, such as popups, keywords, checkout collection, and QR codes, alongside sophisticated segmentation and automation capabilities based on various customer attributes and behaviors. Postscript emphasizes compliance with an in-house legal team and strategic partnerships, ensuring merchants are protected from costly lawsuits.

Available on: Web

how we evaluateSourcepostscript.io ↗

Pros & Cons

Pros

  • Deep integration with Shopify ecosystem
  • High ROI on SMS spend (average 34x reported)
  • AI-driven optimization for campaigns and automations
  • Fast subscriber list growth tools
  • Strong focus on SMS compliance and legal protection

Cons

  • Primarily focused on Shopify, may not be suitable for other e-commerce platforms
  • Specific pricing details are not publicly available, requiring a demo

Ratings Across the Web

4.8(161 reviews)

Postscript SMS holds an aggregate rating of 4.8 out of 5 from 161 reviews across G2, last checked September 17, 2026.

G2161 reviews
4.8/5

Ratings aggregated from independent review platforms. Learn more

Key Features

AI-powered Brand Center for consistent brand voiceInfinity Testing for optimizing message variants with AIShopper: AI shopping assistant for 1:1 customer conversationsDesktop & mobile popups for subscriber acquisitionCheckout collection for SMS opt-insAdvanced segmentation with over 45 filtersAutomation triggers based on 65+ eventsFlow Builder for visual campaign and automation management

Pricing Plans

Free Trial

Pricing checked Sep 10, 2026

Starter

$0 / mo

  • Campaigns and automations
  • Unlimited segments
  • Dedicated toll-free number
  • Subscriber acquisition tools, with 2 opt-in Keywords
  • Branded short link subdomain

Growth

$100 / mo

  • Starter features
  • Unlimited opt-in Keywords
  • Live chat and email support

Professional

$500 / mo

  • Growth features
  • Enhanced Analytics
  • Priority live chat/email support
  • API access for custom integrations
  • "Powered by Postscript" removed from opt-in

Enterprise

Contact us

  • Professional features
  • Onboarding Launch Specialist
  • Send personalized messages with custom product recommendations
  • Priority live chat support
  • Data Warehouse Push
Calculate your costView full pricing

Is Postscript SMS worth the price?

85/100

Postscript SMS offers a fair pricing structure, especially with its generous Starter tier at $0/mo for essential features.

The jump to Growth at $100/mo and Professional at $500/mo seems reasonable for the added support and advanced analytics. This pricing is best for Shopify brands looking to scale their SMS marketing, from startups to large enterprises.

How Postscript SMS's pricing compares

At $100/mo, Postscript SMS is the most premium of its 2 direct competitors.

Klaviyo
$20
Gorgias
$40
Postscript SMS
$100

Entry paid plan, monthly. Pricing checked Sep 10, 2026.

Reviews

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4.8/5

Across 161 verified user reviews on G2

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Postscript SMS FAQ

How does Postscript help Shopify brands grow their SMS subscriber list?

Postscript offers several tools for rapid list growth, including customizable desktop and mobile popups, text-to-join keywords, and checkout collection integrations for Shopify, Recharge, and Carthook. It also provides standalone landing pages with opt-in forms and QR codes for physical locations.

What specific AI features does Postscript offer to enhance SMS marketing campaigns?

Postscript AI includes Brand Center for maintaining brand voice consistency, Infinity Testing to optimize message variants for campaigns and automations, and Shopper, an AI-powered shopping assistant for personalized customer conversations. These features aim to drive higher revenue and improve engagement.

Can Postscript integrate with my existing Shopify checkout process to collect SMS subscribers?

Yes, Postscript integrates directly with Shopify and Shopify Plus checkout pages, as well as with Recharge and Carthook. This allows brands to collect SMS subscribers seamlessly during the purchase process.

How does Infinity Testing differ from traditional A/B testing for SMS messages?

Infinity Testing leverages AI to generate and test hundreds or even thousands of on-brand message variants simultaneously, rather than just two. This allows for faster optimization and a deeper understanding of what resonates with customers, leading to significant revenue and EPM lifts.

What kind of segmentation and automation capabilities are available to tailor SMS messages?

Postscript provides over 45 segmentation filters, including historical Shopify data, SMS activity, and geographic location. It also offers more than 65 automation trigger events, such as abandoned cart or order created, and over 85 trigger filters to personalize messages based on specific order details or subscriber attributes.

How does Postscript ensure compliance with SMS marketing regulations?

Postscript prioritizes compliance with an in-house legal team and strategic partnerships, actively participating in the Ecommerce Innovation Alliance. Their product and strategy are built around protecting merchants from costly lawsuits by adhering to common-sense ecommerce policies.

Source: postscript.io

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