Postscript
Send identity-resolved events to Postscript so SMS flows reach subscribers the pixel missed.
About Postscript
What Postscript is, and why identity matters to it.
Postscript is an SMS marketing platform built specifically for Shopify brands, covering campaigns, automations and subscriber growth.
Its automations fire on storefront and checkout behaviour — which means they only reach the subscribers whose behaviour actually made it through.
How it works
How Postscript works.
Postscript is built specifically for Shopify, syncing orders, customers and products directly from the store. Subscribers are keyed on phone number. Automations trigger on storefront and checkout behaviour — abandoned checkout, post-purchase, win-back — and evaluate conditions against the subscriber and their order history. Because it reads Shopify directly, its view of a customer is as complete as Shopify’s own.
With Upstack Data
Get more out of Postscript with Upstack Data.
Postscript sees what Shopify sees. Upstack widens that: sessions that never reached checkout are resolved to known subscribers, so abandonment and browse automations reach people Shopify could not identify. Orders arrive server-side, so automations are not waiting on a browser event that may never fire.
What you can do with it
Three jobs this connector does inside Postscript.
Send complete conversions
Conversions reach Postscript through its server-side API with restored click IDs and hashed identifiers attached, so more of what you send is matched on arrival — and the conversions you never saw stop being invisible.
Optimise on the customer you want
Map any order attribute to the conversion Postscript receives — profit rather than revenue, new customers rather than repeat buyers, high-value orders rather than every checkout — so the platform learns from the buyers worth acquiring.
Automations that reach the subscriber
Storefront and checkout behaviour arrives tied to a known subscriber, so automations stop silently skipping the people they couldn’t identify.
Pre-built connectors
12 sources connect to Postscript.
Whichever of these you run, Postscript is one switch away.
Similar integrations
Other Email & SMS integrations.
- KlaviyoDestination
Flows fire for visitors the pixel lost.
- AttentiveDestination
SMS journeys triggered on people, not sessions.
- OmnisendDestination
Resolved events for email and SMS automation.
- How resolution worksThe 750M+ device graph, restored click IDs and the identifiers that persist for months.Upstack Signal
- Every integrationSix sources in, eighteen destinations out, and every pairing between them.Browse the catalogue
- What it costsThree plans that scale with your order volume. Same integrations on every plan.See pricing
Get Postscript tracking right.
A 15-minute walkthrough tailored to your stack and channels.