The company wants to work with

This expansion is really a move to stop being just a Shopify app and become a messaging layer that follows merchants wherever they sell. Today, Postscript gets distribution and product data from Shopify, but that also caps it to one ecosystem. If it can plug into other commerce tools and storefronts, it keeps its best brands as they grow, sees more customer behavior across channels, and makes its automations, subscriber capture, and partner integrations more valuable.

• Postscript’s early edge came from tight Shopify integration and App Store discovery. Merchants could install it in one click, sync store data, and start sending triggered texts from events like cart activity and shipping updates. Expanding beyond Shopify means recreating that same easy data flow without relying on one platform for growth.
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• The best comparison is Klaviyo. It also grew through Shopify, then moved into SMS, in app messaging, and a customer data layer so merchants would not need separate tools as they scaled. That playbook shows why platform expansion matters, it raises retention by keeping customer data and more workflows inside one system.
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• Attentive shows the other route, grow through partnerships across platforms and channels. Its BigCommerce partnership opened access to 60,000 plus merchants, while broader integrations let it serve larger brands with more complex stacks. For Postscript, cross platform support is less about audience overlap and more about following merchants into bigger, messier operating environments.
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The next step is for messaging vendors to own more of the merchant’s customer record, not just send texts. As ecommerce brands mix Shopify, custom storefronts, support tools, and data warehouses, the winner will be the platform that keeps subscriber data, campaign logic, and attribution working across all of them. Platform expansion is how Postscript stays in that race.