Postscript vs Attentive: Our Verdict
One publishes every rate on a page you can screenshot. The other opens with a quote and a quarterly minimum. We compared both against the real question a small Shopify store is asking: which SMS platform actually pays for itself.
Postscript wins for the small Shopify store this comparison is written for. Its pricing is public, the lowest tier carries no platform fee, and there's no quarterly minimum or required contract. Attentive is the stronger product at the top of the market, but its custom-quoted, contract-based model is built for brands where SMS is already a large, dedicated revenue channel, not for a founder deciding whether to try SMS at all.
Both products do the same job. They collect phone numbers on a Shopify store, send campaigns and automated flows, and attribute the revenue back. They answer the buying question in opposite ways.
Postscript publishes its tiers, per-message rates, and carrier-fee averages on a page any founder can read before signing up. Attentive doesn't publish pricing at all. Every number is a custom quote against a message volume, a list size, and a channel mix. That difference isn't cosmetic. It changes who each platform is actually for, and it decides most of the rounds below.
We compared both against the same buyer: a small Shopify store, owner-operated or with a small marketing team, choosing an SMS platform for the first time. Our evidence is each vendor's current official pricing and help documentation, cited below, not a hands-on send test.
Postscript's pricing page lists three self-serve tiers with monthly fees (Starter, Growth at $100/month, Professional at $500/month), states its per-message rates, and publishes the US carrier passthrough averages, about $0.00418 per SMS and $0.00841 per MMS, noting that Postscript bills those fees at cost with no markup. Attentive's own pricing page confirms the opposite: pricing is "tailored to your business needs based on your message volume, subscriber list size, number of channels, and AI products selected," with no rate card and no self-serve tier. For a founder trying to budget before committing, that gap is decisive.
How we tested itWe opened each vendor's official pricing page and recorded exactly what a founder can learn without a sales call: platform fees, per-message rates, minimums, and carrier passthroughs.
Postscript states on its pricing page that contracts are optional, not required. A merchant can install, pick a package, and be billed monthly. Its help center documents that Starter customers can cancel from within the dashboard. Attentive's own site describes usage-based pricing but doesn't publish contract length or minimums. Every reported figure for its quarterly minimums and multi-quarter terms comes from third-party buyer-intelligence and review sources, not from Attentive. A small operator committing sight unseen to a negotiated multi-quarter term is taking on a risk Postscript simply doesn't ask for.
How we tested itWe read each vendor's stated terms on contract length, minimum spend, and cancellation, and compared them against the buyer's need to try SMS without a long-term lock-in.
Postscript is built for Shopify and states that its features and list-growth tools are "hard-wired to follow guidelines set by the TCPA, mobile carriers, and other regulatory bodies," with a dedicated toll-free number verified for the merchant at no additional cost. Attentive is a strong ecommerce platform with Shopify integration, but it isn't Shopify-first. Its documentation positions it as a multi-channel platform (SMS, MMS, RCS, email, push) sold with strategic support and a dedicated customer success manager. For a small Shopify merchant that wants to be compliant without hiring anyone to think about it, Postscript's posture is the closer match.
How we tested itWe reviewed each product's stated integration and compliance posture in its own documentation, focused on what a Shopify merchant needs on day one: list growth, checkout capture, TCPA handling, and a compliant sending number.
On Postscript's Starter tier, the platform fee is $0/month with a monthly minimum spend, and the published SMS rate on Starter is $0.009/SMS with MMS at $0.045, plus the carrier passthrough at cost. That gives a small store a real number to plan against before it sends its first message. Attentive publishes no per-message rate and no monthly floor, so a small store can't know its cost until it takes a sales call. The one number Attentive states publicly on its own materials that scales with SMS programs, the $750/month dedicated short code fee, which Postscript also passes through, is the same either way.
How we tested itUsing each vendor's own published figures, we modeled a founder's likely first-year send: campaigns and automations to a subscriber list in the low thousands, mostly SMS with occasional MMS. Attentive's side of the model is bounded by what Attentive itself confirms publicly.
Attentive is the round where the premium earns its name. Its own site describes a platform spanning SMS, MMS, RCS, email, and push, with a "complete AI suite" for copywriting, optimization, list growth, and 1:1 messaging, plus a dedicated customer success manager and full-service onboarding included with its plans. Postscript's Professional tier adds an onboarding specialist, dedicated CSM, API access, and priority support at $500/month, and it sells a separate Postscript AI bundle on top. Both are credible at scale, but Attentive's stated feature-and-service package is the richer one for a brand that has already decided SMS is a strategic channel.
How we tested itWe compared what each product's own documentation says about the tools a brand gets once SMS becomes a primary revenue channel: AI copy, testing, channel breadth, and account support.
Where the verdict turned
This is a comparison decided by the buyer, not the software. Both products can run a competent SMS program for a Shopify store. Only one of them lets a small store find out what it’ll cost before it signs anything.
Postscript states on its own pricing page that contracts are optional. A merchant can select a package, install the app, and be billed monthly, with contract-based pricing available on request through its sales team. Its Starter plan carries no monthly platform fee, and the tiers above it are published at flat monthly amounts. A founder can read the page, do the math, and start sending.
Attentive’s own pricing page confirms the opposite approach: pricing is tailored to business needs based on message volume, subscriber list size, number of channels, and AI products selected, on a usage-based model with no credit system. There’s no self-serve tier and no posted rate. For a store above roughly $20M in GMV with SMS already a headline channel, that model isn’t a problem. It’s how enterprise SMS has always been sold. For a small Shopify store still deciding whether SMS earns a line item, it’s the wrong shape of commitment.
What Postscript actually publishes
The Postscript pricing page and help center make the platform easy to price out. The Starter tier has a $0 monthly platform fee (with a monthly minimum spend) and pay-per-message billing. Growth is $100/month and Professional is $500/month, each unlocking lower per-message rates and more account support. Postscript states that its features and list-growth tools are hard-wired to follow TCPA, carrier, and other regulatory guidelines, and that it updates the platform as those requirements change. That’s a real benefit for a founder who can’t afford to think about SMS compliance as its own project.
Postscript offers two options for a sending number, a dedicated short code (DSC) or a toll-free number (TFN). A low-volume or new sender is typically assigned a dedicated TFN that Postscript verifies for the merchant at no extra cost. A dedicated short code is $750/month through the carriers, and Postscript passes that fee through at cost with no markup. That last line matters. On carrier fees generally, Postscript’s usage-based pricing model is designed to let a shop upgrade or downgrade plans as its SMS strategy changes across the year.
What Attentive publishes about itself
Attentive’s own site is the honest place to describe its position. Its pricing page states that plans are built modularly around the buyer’s goals: the number of messages sent, the size of the subscriber list, the number of channels used, and the premium AI tools selected. Attentive says it offers discounts when a customer bundles multiple channels or premium AI products, and that free trials are available.
That’s what Attentive confirms. The rest of the numbers in the market, quarterly minimums in the low thousands of dollars, median annual contracts in the tens of thousands, per-message rate ranges, come from third-party buyer-intelligence and review sites, not from Attentive itself. We aren’t going to publish figures Attentive doesn’t stand behind on its own page. The point for a small-store buyer isn’t the specific number. It’s that the number isn’t knowable without a sales conversation.
Where Attentive is the honest answer
Attentive’s own materials describe a platform sold with strategic support, priority support from a dedicated customer success manager, and full-service onboarding, across SMS, MMS, RCS, email, and push. That’s a real feature set, and it’s the shape of platform a large DTC brand should be buying. For a store where SMS already produces a meaningful share of revenue and a marketer is running the program full-time, the AI suite, dedicated CSM, and channel breadth are worth paying a premium for.
Our verdict isn’t that Attentive is a worse product. It’s that Attentive is the wrong-sized commitment for the buyer this comparison is written for.
Who should buy which
Choose Postscript if the store runs on Shopify, if this is the first serious SMS program, and if the founder needs to see the price before signing up. The Starter tier lets a store learn whether SMS pays for itself without a platform fee, and the paid tiers above it are published at flat rates a small operator can plan against.
Choose Attentive if SMS is already producing a large share of revenue at scale, if there’s a dedicated retention marketer to run it, and if the business is prepared to negotiate a custom quote for a bundled SMS-and-email program with dedicated account support. In that shape of business, Attentive’s premium is what a serious channel should look like.
A small Shopify store also has a broader stack question worth answering before it commits to any SMS tool. If email is going to be the primary channel and SMS is second, our verdict on the AI email marketing platforms we recommend for small businesses is the better place to start. SMS is usually a bolt-on to the email engine, not the other way around. If content marketing needs to drive traffic before either channel has an audience to talk to, our AI SEO blog writers we recommend for small businesses verdict is the companion piece.
The bottom line
For the buyer this page is written for, a small Shopify store owner deciding on an SMS platform for the first time, Postscript is the recommendation. Not because Attentive is a bad product. Because Postscript answers the buying question a small store actually asks, at the price it can actually read, without a contract it doesn’t yet know it needs.