Postscript
SMS marketing built exclusively for Shopify — AI-powered campaigns that drive 30–50x ROI from your customer list.
What is Postscript?
Postscript is the leading SMS marketing platform built exclusively for Shopify. While tools like Klaviyo offer SMS as an add-on, Postscript was built from the ground up for e-commerce SMS — and it shows.
SMS marketing consistently delivers the highest ROI of any marketing channel for e-commerce: 30–50x is common for well-run programs.
AI Sales Assistant
Postscript’s AI Sales Assistant handles inbound SMS conversations automatically:
- Answers product questions using your catalog
- Handles order status queries via Shopify integration
- Collects preferences and routes to the right campaign
- Escalates to human agents when needed
The result: a two-way SMS channel that feels personal but scales automatically.
Key SMS Flows for Shopify
- Welcome — subscriber discount delivery + brand intro
- Abandoned cart — high-urgency recovery sequence
- Shipping updates — proactive order status notifications
- Win-back — exclusive offer for lapsed buyers
- Back in stock — instant alert for wishlist items
- Post-purchase — review request + cross-sell
Pricing
Postscript charges a platform fee plus usage:
| Plan | Platform Fee | Messages |
|---|---|---|
| Growth | $100/mo | Pay per message |
| Professional | $500/mo | Volume discounts |
| Enterprise | Custom | Custom rates |
Messages typically cost $0.01–0.015 each (inbound free).
Postscript vs Klaviyo SMS
Choose Postscript if SMS is a primary channel you’re committed to building. Choose Klaviyo SMS if you want email and SMS unified without managing two tools.
Verdict
If your Shopify store has a meaningful customer list and you haven’t launched SMS yet, Postscript is the fastest path to a new revenue stream. The ROI case is exceptionally strong.