Postscript

Postscript is SMS and RCS marketing for Shopify stores: campaigns, automation flows, a shared reply inbox and per-message billing.

Postscript is an SMS and RCS marketing tool for ecommerce, built around a Shopify integration rather than a generic contact list, for brands that want texting to become a revenue channel. It is made by Postscript, a fully remote company registered as Stodge Inc. in Scottsdale, Arizona, that has operated since 2018. Bulk SMS campaigns and automation flows are assembled in one drag-and-drop builder, with abandoned cart automation and A/B split testing inside the flows. Subscriber segmentation filters on Shopify order data alongside SMS activity and tags, coupons generated inside Postscript apply themselves at checkout, trackable short links and custom UTM parameters measure the clicks, and replies land in a two-way conversations inbox where a person answers them. Opt-in keywords, keyword auto-replies and QR code opt-in grow the list alongside popups. Compliance is handled inside the platform: a toll-free number is provisioned and carrier-verified, STOP and its variants are honoured automatically, quiet hours are enforced in each recipient's own time zone, and landlines and invalid numbers are stripped before a send. MMS and RCS messaging, a dedicated short code add-on, a REST API, Enhanced Analytics and Data Warehouse Push complete the platform, with the AI plan, the managed Postscript Plus service and the CashBack offer sold as extras. Postscript suits Shopify and Shopify Plus merchants, ecommerce brands running SMS as a revenue channel, agencies running SMS for several stores, retention and lifecycle marketers, and brands sending mainly to the United States and Canada. It is sold as a monthly platform fee plus per-message charges: Starter carries no platform fee but a minimum spend, Growth and Professional raise the fee and lower the per-message rate, and Enterprise is quoted. API access, branding removal and a dedicated customer success manager begin at Professional, a trial comes with a message credit, and the plan cards list every tier. In daily use Postscript recovers abandoned carts and browse sessions, welcomes new subscribers, sends back-in-stock alerts, runs flash sale and holiday campaigns, cross-sells after a purchase, wins back lapsed customers and VIPs, answers customer service questions over text and grows the list from popups, keywords and QR codes. Merchants on other platforms install an SDK themselves, so it sits beside the Shopify store and the email platform rather than replacing them.