Postscript vs Attentive: Which SMS Platform Fits Your Shopify Store?

For most Shopify stores, PostscriptPostscriptEmail and SMSPostscript is an SMS marketing platform for Shopify stores, with campaigns, automated text flows, list-growth tools and an AI shopping assistant. Paid from $49/mo, 30-day trial.Click for Scout's full analysis is the better choice: it publishes every self-serve price, starts with no platform fee and a $49 monthly minimum, and is built around Shopify. AttentiveAttentiveEmail and SMSAttentive is an SMS and email marketing platform for ecommerce brands, with signup units, segmentation, lifecycle messaging and AI-driven send time and personalization. 30-day trial.Click for Scout's full analysis makes more sense for large brands that want SMS and email in one managed program and are ready for a sales-led contract.

Weighing more than these two? Our guide to the best SMS marketing apps for Shopify also covers Klaviyo and Omnisend.

Quick comparison

Ratings as listed on the Shopify App Store in November 2026.

The main difference: how you buy

The biggest gap between these two isn't a feature. It's that you can price Postscript yourself in a few minutes, and you can't price Attentive at all without a sales conversation.

Postscript's pricing page lists four marketing plans, three of them with exact platform fees and per-message rates. Attentive's Shopify listing says "Free to install. Additional charges may apply," offers a minimum 30-day free trial, and then "month-to-month and long-term agreements."

For a store still testing whether SMS pays off, that matters more than any feature list. For a large brand that will negotiate anyway, it matters less.

The feature lists overlap more than the buying process does. Both offer onsite signup tools, segmentation, automated abandoned cart flows and A/B testing, and both hold a 4.7 rating on the Shopify App Store. Where they split is scope: Postscript is SMS-first with email still arriving, while Attentive already sells SMS and email together and puts compliance support up front.

Postscript

PostscriptPostscriptEmail and SMSPostscript is an SMS marketing platform for Shopify stores, with campaigns, automated text flows, list-growth tools and an AI shopping assistant. Paid from $49/mo, 30-day trial.Click for Scout's full analysis is an SMS marketing platform for Shopify stores, with campaigns, automated text flows, list-growth tools and an AI shopping assistant.

Plans (from Postscript's pricing page and Shopify listing):

• Starter: $0/month platform fee with a $49 monthly minimum spend. $0.009 per SMS and $0.045 per MMS, plus carrier fees. Campaigns, automations, unlimited segments, a dedicated toll-free number, 2 opt-in keywords and a branded short link subdomain.
• Growth: $100/month. $0.008 per SMS and $0.03 per MMS, plus carrier fees. Adds unlimited opt-in keywords and live chat and email support.
• Professional: $500/month. $0.007 per SMS and $0.024 per MMS, plus carrier fees. Adds enhanced analytics, priority support, API access and removes "Powered by Postscript" from opt-in. The Shopify listing also mentions an onboarding specialist and a dedicated CSM.
• Enterprise: contact sales. Adds a dedicated customer success manager, custom product recommendations in messages, Data Warehouse Push and an RCS option.
• Postscript AI plan: $699/month, with per-message rates from $0.003 to $0.30 depending on product and message type. It bundles Brand Center, Infinity Testing and Shopper, an AI tool that answers shopper questions and recommends products by text.

Carrier fees pass through at cost on their own line. Postscript lists average US fees of $0.0033 per SMS and $0.00799 per MMS. Rates apply to the US and Canada.

All plans include a flow builder with automation templates, subscriber acquisition tools, a toll-free number and contact card, advanced segmentation, analytics, response management and custom attribution windows.

Watch out:

• Email is rolling out to brands in phases, and the email section of Postscript's pricing page is a waitlist. It claims email pricing 20-30% lower than "legacy providers," but no email price is published yet, so you will likely need a separate email tool for now.
• MMS is five times the price of SMS on Starter.

Skip Postscript if you want one vendor for SMS and email today.

Attentive

AttentiveAttentiveEmail and SMSAttentive is an SMS and email marketing platform for ecommerce brands, with signup units, segmentation, lifecycle messaging and AI-driven send time and personalization. 30-day trial.Click for Scout's full analysis is an SMS and email marketing platform for ecommerce brands, sold through sales with custom contracts.

What its Shopify listing highlights:

• "Patented two-tap units" for list growth, with a no-code builder offering 30+ unit types
• Segmentation and personalization from identity data across SMS, email, push and RCS
• Personalized lifecycle messages, with AI send time and personalization plus A/B testing
• Abandoned cart, browse abandonment and back-in-stock campaigns
• "In-house TCPA experts & templates" for compliance

Pricing: not published. Our fact sheet notes that pricing is quote-based on message volume and list size.

Watch out:

• You can't compare its cost to Postscript's without a quote.
• After the trial, the agreement may be long-term rather than month to month, so read the terms before you commit.
• It has far fewer Shopify App Store reviews (112) than Postscript (1,205), so its rating rests on a smaller sample.

Skip Attentive if you are a small or new store, or you want to test SMS for a month or two without a sales process.

What Postscript costs at two volumes

Attentive doesn't publish prices, so these examples cover Postscript only. Get an Attentive quote at the same volumes to compare. Carrier fees use Postscript's listed US averages.

10,000 SMS a month:

• Starter: 10,000 × $0.009 = $90 in messages (above the $49 minimum), plus about $33 in carrier fees. About $123/month.
• Growth: $100 + $80 = $180, plus about $33 in carrier fees. About $213/month.

150,000 SMS a month:

• Starter: 150,000 × $0.009 = $1,350, plus about $495 in carrier fees.
• Growth: $100 + $1,200 = $1,300, plus the same carrier fees. Growth is now $50 cheaper than Starter.
• Professional: $500 + $1,050 = $1,550, plus carrier fees.

Growth becomes cheaper than Starter at 100,000 SMS a month, and Professional beats Growth only above 400,000 SMS a month. Below those volumes, upgrade for features, not price.

Which one should you choose?

• Choose PostscriptPostscriptEmail and SMSPostscript is an SMS marketing platform for Shopify stores, with campaigns, automated text flows, list-growth tools and an AI shopping assistant. Paid from $49/mo, 30-day trial.Click for Scout's full analysis if you're on Shopify, want to see your costs before signing, and want to start small and scale.
• Choose AttentiveAttentiveEmail and SMSAttentive is an SMS and email marketing platform for ecommerce brands, with signup units, segmentation, lifecycle messaging and AI-driven send time and personalization. 30-day trial.Click for Scout's full analysis if you're a large brand with a big list, want SMS and email from one vendor with in-house compliance help, and are fine with a contract.
• Get quotes from both if you're sending hundreds of thousands of texts a month. Postscript's Enterprise and AI plans are also sales-led at that size.
• Need email too? See our email marketing tools roundup or pair SMS with KlaviyoKlaviyoEmail and SMSKlaviyo is an email and SMS marketing platform that pulls in store data from Shopify and 350+ other apps to build segments, automated flows and campaigns. Free plan, paid from $20/mo.Click for Scout's full analysis (Klaviyo vs Omnisend).

Common questions

Is Postscript cheaper than Attentive? We can't say for sure, because Attentive doesn't publish prices. Postscript's Starter plan has no platform fee and a $49 monthly minimum, which is a low, known entry point.

Do Postscript and Attentive have free trials? Yes. Postscript says all plans start with a free 30-day trial, and its Shopify listing adds a $100 credit for the first 30 days. Attentive's listing offers a minimum 30-day free trial.

Does Postscript charge carrier fees? Yes, on top of its per-message rates. It passes them through at cost and lists average US fees of $0.0033 per SMS and $0.00799 per MMS.

Can Attentive send email? Yes. Attentive covers SMS and email, and its segments use identity data across SMS, email, push and RCS.

Which has better reviews? Both are rated 4.7 as listed on the Shopify App Store in November 2026. Postscript has 1,205 reviews and Attentive 112.

How we put this together

We did not test Postscript or Attentive hands-on. Facts and prices come from Postscript's pricing page and Shopify App Store listing, and Attentive's Shopify App Store listing, all read in November 2026, plus our tracked fact sheets for both tools (checked November 2, 2026). Attentive publishes no prices, so we haven't estimated any. Per-message rates and carrier fees change, so confirm them before you commit.