Postscript

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Postscript helps Shopify brands grow revenue with AI-powered SMS marketing. Build lists faster, automate campaigns, and engage customers 1:1 with an always-on AI shopping assistant.

Marketing & Sales

Automation & Agents

Shopify Apps

About

Postscript is a comprehensive SMS marketing platform designed from the ground up for Shopify merchants. It empowers brands to build engaged subscriber lists, launch high-performing SMS campaigns, and deliver personalized 1:1 conversations that drive measurable revenue growth. The platform's AI capabilities replace traditional A/B testing by automatically generating and testing hundreds of on-brand message variants in a fraction of the time, delivering an average 34x ROI on SMS spend. Postscript's flagship AI shopping assistant, Shopper, acts as an always-on conversational agent that answers customer questions and drives sales through authentic SMS engagement at scale. Additional features include CashBack—a smart coupon alternative that powers list growth while improving margins—RCS messaging for rich branded experiences, and world-class list growth tools like popup editors and onsite opt-ins that help brands grow subscriber lists up to 3x faster than competing platforms. Postscript Plus grants access to in-house SMS strategists who build and optimize programs end-to-end. Deep Shopify integration, robust compliance tooling, and subscriber LTV analytics make Postscript an enterprise-grade choice for e-commerce brands serious about SMS as a primary revenue channel. Brands using Postscript report an average 22% increase in online revenue attributed directly to SMS.

Key Features

AI Message Optimization: Automatically generates and tests hundreds of on-brand SMS message variants simultaneously, replacing traditional A/B tests and driving higher ROI with every send.
Shopper AI Shopping Assistant: An always-on conversational AI agent that engages subscribers via SMS, answers product questions, and drives sales through authentic 1:1 personalized conversations at scale.
CashBack & List Growth Tools: Smart coupon alternative combined with a world-class popup editor and onsite opt-in tools that help brands grow their SMS subscriber list up to 3x faster than other platforms.
RCS Messaging: Send rich, branded messages with images, carousels, and interactive buttons through RCS to drive higher engagement and conversion rates beyond standard SMS.
Postscript Plus Strategy Team: Access in-house SMS strategists who create, run, and optimize your entire SMS program, combining deep e-commerce expertise with Postscript's AI technology.

Use Cases

Running AI-optimized flash sale SMS campaigns that automatically find the highest-converting message variant for each subscriber segment.
Growing an SMS subscriber list 3x faster using Postscript's popup editor, onsite opt-in tools, and CashBack incentive program.
Automating personalized customer journeys such as abandoned cart recovery, post-purchase follow-ups, and loyalty re-engagement flows.
Deploying Shopper as a 24/7 AI shopping assistant that handles inbound customer questions and upsells via SMS without human intervention.
Leveraging Postscript Plus strategy services to fully outsource SMS program creation and optimization to in-house e-commerce experts.

Pros

Shopify-Native Integration: Built exclusively for Shopify, Postscript offers seamless store data sync, making segmentation, personalization, and attribution more accurate than generic SMS tools.
Proven Revenue Impact: Brands consistently report 34x average ROI on SMS spend and 22% increases in online revenue, with AI features delivering an additional 20% average revenue lift.
Comprehensive Compliance: Handles opt-in, opt-out, and delivery compliance automatically, reducing legal risk and ensuring every message sent meets regulatory requirements.

Cons

Shopify-Only Platform: Postscript is exclusively built for Shopify merchants, making it unavailable to brands on other e-commerce platforms like WooCommerce or BigCommerce.
SMS-Focused Scope: The platform is dedicated entirely to SMS/RCS channels, so brands seeking a unified multichannel marketing suite (email, push, etc.) will need additional tools.
Premium Pricing for Scale: Costs can increase significantly as subscriber lists and message volumes grow, which may be a barrier for early-stage brands with tight budgets.

Frequently Asked Questions

Postscript is an AI-powered SMS marketing and sales platform built exclusively for Shopify brands. It's designed for e-commerce teams—from growing DTC brands to large enterprises—who want to use SMS as a primary revenue-generating channel.

Shopper is Postscript's always-on AI shopping assistant that engages SMS subscribers in real-time 1:1 conversations. It answers product questions, provides recommendations, and drives purchases through authentic, on-brand messaging at scale.

Postscript is solely focused on SMS for Shopify, which means deeper integration, more accurate data, and a team whose entire expertise is SMS strategy. Features like AI message variant testing, Shopper, CashBack, and Postscript Plus strategy services set it apart from generic platforms.

CashBack is a smart alternative to traditional discount coupons. It incentivizes subscribers to join your list and make purchases by offering store credit rewards, which drives list growth and improves margins compared to standard percentage-off promotions.

Yes. Postscript manages compliance across the entire SMS lifecycle—from opt-ins and opt-outs to message delivery—ensuring brands meet TCPA and carrier requirements automatically.