Postscript

Postscript is built for Shopify brands that treat SMS as a revenue channel tied closely to ecommerce behavior. Retention marketers, ecommerce founders, lifecycle teams, agency strategists, and customer experience leaders use it to grow subscriber lists, send campaigns, trigger automations, answer shopper questions, test message variants, and keep SMS activity inside compliance guardrails. Its product set now includes SMS Marketing, Postscript Plus strategy services, Postscript AI, RCS, Shopper, CashBack through Fondue, conversational messaging, list-growth tools, and compliance support.

The product is easiest to position around direct-to-consumer stores where a text can affect repeat purchase timing, abandoned-cart recovery, product education, and customer questions. A skincare brand can collect onsite opt-ins, segment subscribers by behavior, send a product-drop campaign, and let shoppers ask questions by text. A retention agency can pair Postscript with Shopify and integrations such as Gorgias, Zendesk, Klaviyo, Recharge, AfterShip, Justuno, Zapier, and Okendo to manage SMS alongside support, subscriptions, reviews, and email. Postscript is narrower than a generic SMS app: its strongest story is ecommerce SMS for Shopify merchants.

Postscript's partner path is written for marketing agencies, development agencies, app developers, ecommerce influencers, investors, and other partners that can refer Shopify merchants. Applicants use the partner signup page, then receive access to a PartnerStack-powered referral portal with a branded referral link, referral tracking, enablement resources, and partner training or certification. Existing Postscript customers have a separate customer referral program, so this row uses the partner/referral agreement rather than the in-app bill-credit offer.

The legal agreement says an eligible Postscript referral is a new Shopify merchant that signs up through the affiliate link or lead form and converts to a paid account. Postscript pays a monthly referral fee for the first 12 consecutive months after conversion, equal to 10% of fees actually received for Platform Services, excluding carrier fees and other limited amounts. The agreement says Postscript referral fees are due within 30 days after Postscript receives the customer's monthly message fees. PartnerStack administers the portal and supports PayPal, Stripe, and direct-deposit withdrawals with a $5 minimum; no public Postscript cookie duration was found.