This is our Postscript review for Shopify store owners whose email campaigns are being ignored. You sent an email. The open rate came back at 18%. Which means 82 out of every 100 people never even saw it. Is that normal? For email, yes — but not for SMS. Text messages have a 98% open rate. Postscript uses exactly that difference — connecting your Shopify store to SMS marketing so you can reach customers directly in their pocket.
Built exclusively for Shopify, Postscript has become the leading SMS marketing platform for ecommerce brands. Here's what we found in our Postscript review.
Postscript Review: First Impressions
Setup connects directly to Shopify — your customer data, order history, and cart activity sync automatically. Building your subscriber list starts immediately through pop-ups, checkout opt-ins, or keyword campaigns.
The interface is clean and focused. Everything is built around one goal: sending the right SMS to the right customer at the right moment. Campaign creation is fast, and the compliance tools handle TCPA requirements automatically.
Key Features
SMS Campaigns: Send broadcast messages to your entire list or specific segments. Flash sales, new product launches, seasonal promotions — delivered directly to your customers' phones.
Automated Flows: Trigger SMS sequences based on customer behavior. Cart abandonment reminders, welcome series, post-purchase follow-ups, win-back campaigns — all running automatically.
Subscriber Growth Tools: Pop-ups, embedded forms, checkout opt-ins, and keyword campaigns (text "JOIN" to subscribe). Multiple ways to build your list.
Segmentation: Target specific customer groups based on purchase history, location, engagement, and more. Send a different message to first-time buyers than to loyal customers.
Two-Way Messaging: Customers can reply to your messages. Handle customer service conversations directly via SMS.
Compliance Tools: Built-in TCPA compliance, automatic opt-out handling, quiet hours settings. SMS marketing has strict legal requirements — Postscript handles them automatically.
What Real Users Are Saying About Postscript
Over 1,900 reviews on the Shopify App Store, average rating 4.8/5.
Recurring themes in positive reviews: SMS open rates are genuinely transformative compared to email, the Shopify integration is seamless, cart abandonment SMS campaigns deliver exceptional ROI.
Recurring themes in negative reviews: cost per message adds up for high-volume campaigns, list building takes time, SMS marketing requires careful frequency management to avoid unsubscribes.
Postscript's published data, supported by G2 reviews: SMS cart abandonment campaigns convert at 20-25% — significantly higher than email cart abandonment. The channel difference is real.
Postscript Review: Pros & Cons
| ✅ Advantages | ❌ Disadvantages |
|---|---|
| 98% SMS open rates vs. 18% for email | Per-message pricing adds up at scale |
| Built exclusively for Shopify — deep data integration | List building takes time and effort |
| Automated flows for every stage of customer journey | Too frequent messages cause unsubscribes |
| Two-way messaging for customer service | US and Canada only — no international SMS |
| Built-in TCPA compliance — legal protection | Requires separate strategy from email |
| $100 free credits to start | Works best alongside email, not instead of it |
Who Is Postscript For — And Who Isn't It For
Postscript is the right choice if:
- You're selling to US or Canadian customers
- Your email open rates are plateauing and you need a new channel
- You want to add SMS to complement your existing Klaviyo email strategy
- You run flash sales or time-sensitive promotions that need immediate visibility
Postscript is not the right choice if:
- You sell internationally — Postscript is US and Canada only
- You're just starting out — build your email list and traffic first
- Your margins are very thin — SMS campaigns need room for ROI
- You already have low order volume — the channel pays off at scale
Postscript Pricing: Is It Worth It?
- Free trial: $100 in free SMS credits to start
- Starter ($100/mo): Includes $100 in credits, basic automations
- Growth ($500/mo): Higher volume, advanced segmentation, priority support
- Pay-per-message model — costs vary by volume and message type
Honest take: start with the $100 free credits to test your first campaign and cart abandonment flow. If you see strong open rates and conversions, the investment is clear. SMS works best as a complement to Klaviyo email — not a replacement. Together, they cover every touchpoint in your customer's day.