Postscript provides a retention marketing platform for SMS, RCS, and email. It is based in San Francisco, California. It employs 201 to 500 people.
Overview
Postscript sells a retention marketing platform for Shopify merchants that sends SMS, RCS and email messages. It combines list-building tools, campaign and automation builders, AI products and compliance support so a brand can grow a subscriber list and earn revenue from messaging.
For Shopify brands
- Build a subscriber list with popups, checkout collection, Onsite Opt-in and opt-in forms.
- Send campaigns and automations such as cart and browse abandonment, welcome, upsell and shipping messages, segmented with Shopify data.
- Hand SMS strategy to Postscript's in-house strategists through the Postscript Plus managed service.
How it works
A brand installs Postscript from the Shopify App Store or starts a free trial, then builds campaigns and automations in the visual flow builder. Postscript provides the messaging platform, compliance guardrails and support, and offers a managed service where its strategists run the SMS program.
- Built for
- Ecommerce brands on Shopify that want to run SMS, RCS and email programs, from brands getting started to those scaling SMS as a main revenue channel.
- Pricing
- SMS plans are Starter at $0/month with a $49 monthly minimum spend, Growth at $100/month, Professional at $500/month and Enterprise on custom quote, plus per-message rates and carrier fees. The Postscript AI Plan is $699/month plus per-message rates.
Products
- SMS Build a list, create and send text messages, and run automations and campaigns.
- RCS Send rich messages from a branded profile.
- Email Send emails from the same platform as SMS and RCS.
- Postscript AI Plan Bundle of Brand Center, Infinity Testing and Shopper AI products.
- Shopper Runs 1:1 agentic marketing journeys for individual subscribers.
- Postscript Plus Managed SMS service where in-house strategists create, run and optimize the program.
Integrations
Buyer notes
- Starter has a $49 monthly minimum spend; the App Store lists a $100 credit for the first 30 days.
- Rates listed are for the US (50 states) and Canada only; carrier fees are charged on top.
- The site offers a free 30-day trial.
- Billing is after sending, with no prepaid balances or profile fees; Enterprise adds a dedicated Customer Success Manager.
From Postscript's own site and Shopify App Store listings, as of 2026-10-30.
How much does Postscript cost?
SMS plans are Starter at $0/month with a $49 monthly minimum spend, Growth at $100/month, Professional at $500/month and Enterprise on custom quote, plus per-message rates and carrier fees. The Postscript AI Plan is $699/month plus per-message rates.