Postscript
SMS and MMS marketing platform built for Shopify brands
About Postscript
Postscript is an SMS and MMS marketing and sales platform designed specifically for Shopify e-commerce brands. It enables merchants to grow subscriber lists through popups, checkout collection, QR codes, and keyword opt-ins. The platform supports targeted text message campaigns, automated SMS flows triggered by customer events, and two-way conversational messaging at scale. Postscript features advanced segmentation based on purchase behavior, AI-powered A/B testing, and detailed revenue attribution analytics. With built-in TCPA compliance and deep Shopify integration, it connects to help desks, email platforms, and review tools to create a unified marketing stack.
Pros & Cons
Pros
- Purpose-built for Shopify with deep integration
- Free starter plan with low barrier to entry
- AI-powered message optimization
- Built-in compliance and carrier guideline adherence
- Strong revenue attribution and analytics
Cons
- Only works with Shopify stores
- Per-message and carrier fees add up at scale
- Professional plan required for API access
- No support for non-e-commerce use cases
Key Features
SMS and MMS campaign management
Automated text message flows
Advanced subscriber segmentation
AI-powered A/B testing (Infinity Testing)
Revenue attribution analytics
List building via popups, QR codes, and keywords
Two-way conversational SMS
Deep Shopify-native integration
TCPA-compliant messaging
Help desk and email platform integrations
Pricing
- $25/mo minimum spend
- Basic SMS campaigns
- 30-day free trial
- List building tools
- Lower per-message rates
- Unlimited opt-in keywords
- Live chat & email support
- Advanced automations
- Onboarding specialist
- Dedicated CSM
- API access
- Priority support
- Dedicated enterprise CSM
- Custom SMS strategy
- Volume discounts
- Custom integrations
Featured In
Best Tools for Managing a Shopify Store Doing $1M+ Revenue (2026)
Best SMS marketing platform for Shopify stores that need a high-engagement channel beyond email — Postscript's behavioral triggers and compliance handling make SMS marketing scalable.
Best Tools for Running a Successful Black Friday Campaign (2026)
Best SMS marketing tool for BFCM — reliable infrastructure for the send volume spikes BFCM creates.
The Complete Tech Stack for an E-commerce Brand Doing \u00245M+ Revenue (2026)
Best for brands treating SMS as a primary revenue channel — adds dedicated SMS capabilities beyond what Klaviyo's built-in SMS provides
Tools That Integrate Natively With Shopify for Retention (2026)
Best SMS-first retention tool for Shopify — deeper conversational commerce and SMS-specific features than any multi-channel platform's SMS add-on
Best Conversational Commerce Platforms for Shopify Merchants (2026)
Best for US/Canada Shopify merchants who want SMS to become a top-3 revenue channel with zero compliance headaches.