Attentive vs Postscript (2026): From an Agency That Runs Both

If you’re comparing these two, you’ve probably already read four pages that say the same thing: Postscript is the Shopify one, Attentive is the enterprise one, here’s a feature grid, good luck. Every one of those pages is out of date, and none of them answers the question you’re actually asking, which is whether a brand your size should be paying either of them.

We run subscription programs for a living, which means we’ve built flows inside both platforms, migrated a brand off one of them, and sat in the room while a founder played all three vendors against each other on price. This is what we learned doing that, including the parts that don’t flatter the conclusion.

Before anything else: YOCTO has partner relationships with both platforms. Read everything below with that in mind, and check the figures yourself. We’ve dated every one of them so you can.

The short answer

Postscript is the self-serve option: four published tiers, per-message rates from $0.007, month to month, no profile fees. Attentive is the sales-led option: no published prices, an annual contract in the ones we have seen, and staff who build for you. Postscript fits brands that want to price it themselves. Attentive fits brands that are buying people as much as software.

Postscript publishes a rate card. Attentive doesn’t. That single difference tells you more about who each product is built for than any feature comparison will, and it’s the fastest way to work out which conversation you’re about to have.

If you want to know your costs before you talk to anyone, Postscript is the one you can price in about ninety seconds. If you want a vendor with staff who’ll build and run things on your behalf, that’s the Attentive pitch, and it’s a real one. What neither sales process will tell you is that most brands shopping this comparison don’t have a platform problem at all.

We’ll get to that. First, what each one actually sells.

Two things in that table are worth pausing on, because the pages ranking for this comparison get both wrong.

The first is that Postscript isn’t a text-only product any more. It sells RCS, it’s taking signups for email, and it has an AI bundle. The second is that the review gap is enormous. Both apps hold the same 4.7 rating, and one has eleven times the review base of the other. That’s not a quality signal, it’s a distribution signal, and it tells you where each company’s center of gravity sits in the Shopify market.

What Postscript charges, in full

Here’s the whole card, read off their pricing page on 7 October 2026. We’re reproducing it because it’s genuinely unusual for this category, and because you can verify every line in a minute.

Carrier fees sit on top and get passed through at cost on their own line: $0.00330 per SMS and $0.00799 per MMS for the US and Canada. There’s an AI plan at $699 a month on top of that, and a free trial that gives you a $100 credit to spend over thirty days.

Look at the MMS column against the SMS column. An image costs you roughly three to five times what a text costs, depending on your tier. Hold on to that number, because it ends up mattering more than the difference between these two vendors.

What Attentive charges

Nobody knows, and that’s the point.

Attentive’s pricing page, on the same day, carries no price at all. Where a table would go, there’s a form. The page tells you pricing is built around four things: how many messages you send, how big your list is, how many channels you use, and which AI tier you want. It describes the model as usage-based with no credit system, and it says bundling channels or AI products earns you a discount.

That isn’t a criticism. It’s how enterprise software has always been sold, and a negotiated price can beat a published one. But it has a consequence worth being honest about: you can’t compare these two on cost without starting a sales conversation with one of them. If you’re a brand doing a few thousand sends a month, that conversation is the answer.

What we find in the accounts we inherit

We’ve spent years taking over SMS programs other people built, on both of these platforms and on others. What’s wrong with them varies a lot. It does cluster into a few kinds, though, and in almost every case the platform could do the thing perfectly well. Nobody had asked it to.

Flows running on a schedule nobody chose. One Attentive account we picked up had its win-back firing on the platform’s default timing rather than the brand’s own replenishment cycle. On a consumable, that means asking people to come back while they still have product in the cupboard. Custom timing was available the whole time. It just had not been set.

Filters that exclude the people they were written to include. On that same account, cross-sell ran as one flow per product, each filtered so tightly that anyone who had bought two things entered none of them. Elsewhere in it, a filter written as a double negative had quietly throttled a flow to 1,700 deliveries while its counterpart did 53,000.

Programs that were never really built. A Postscript account we took over held a couple of abandonment automations and nothing else. No campaigns, no pop-ups. The client’s own word for it was a leaking bucket, and they were right. Rebuilding the equivalent elsewhere was about a day of work on the messaging side.

Capture gaps that cap the whole channel. On another program, SMS consent was never collected at the pop-up at all. The only numbers on file came through checkout, carrying consent to send order updates and nothing more. No platform fixes that, and it quietly sets the ceiling on everything downstream of it.

Be careful how you read that list, because it would be easy to take it as a knock on one vendor or the other. It isn’t. Attentive supports multi-step journeys, custom timing and branching, and its own documentation covers all three. Postscript ships a visual flow builder, acquisition tools and segmentation on store data with every plan. Every fault above was a setting, or an absence. None of them was a limit of the product.

What they have in common is what happens when nobody owns the outcome. When a vendor’s team builds your flows as part of onboarding, they build something reasonable and then their job ends at launch. The brand assumes it’s handled, because it went live and it sends. So nobody goes back to ask whether the win-back is firing before customers have run out, or whether a filter is quietly excluding the people it was written to include. We have opened accounts and found faults like those running untouched for months, in programs everyone involved believed were in good shape. That is the thing to check before you switch platforms, because it follows you to the next one.

The question to ask before you switch

One client said the quiet part out loud. Their own assessment of the flows the new vendor built was that it wasn’t anything their team couldn’t have done themselves, and that if every hour spent on the migration had gone into fixing the SMS flows in the platform they already had, they wouldn’t have needed to move.

So before you pick a side in this comparison, check what is actually live in the account you have got. If the answer is an abandoned cart and a welcome message, your next platform will have an abandoned cart and a welcome message too, with a migration project attached.

Your reported ROI is not your incremental ROI

This is the part we’d most like you to take away, and it applies to both vendors and to every alternative.

Every SMS platform reports attributed revenue. Attributed revenue is not incremental revenue. If switching SMS on means the same customer now gets fewer emails, some of the revenue the SMS platform claims is revenue your email program would have earned anyway. The number in the case study is real. It just isn’t all new.

We ran an incrementality test with a brand on exactly this question, and as far as anyone in that room could tell, nobody involved had run one before. The client’s reaction was the right one. If a vendor reports an 18x return, and you can see you’re sending fewer emails to the same people, then what you’re looking at isn’t purely an SMS return.

Her read on why this almost never gets tested was blunt: people are lazy, and they trust what they’re told.

Testing it isn’t complicated. Hold out a slice of your list from SMS entirely, keep everything else identical, and compare total revenue per recipient across both groups rather than reading the number the platform hands you. You’ll either confirm the channel is paying for itself or discover you’re buying revenue twice. Either answer is worth more than the comparison you came here for. If you want a baseline to judge the result against, our subscription benchmarks publish the bands we see across the accounts we run.

What actually drives your SMS bill

Here’s the thing both rate cards obscure. The logo on the invoice is roughly the fourth most important input into what you’ll pay.

Where your customers are. This is the big one. A brand sending to the US gets the published rates. We’ve got a comparable client sending to Australia that pays around four times more for the same message. Postscript’s published card covers the US and Canada and says so. On the credit-based model we’ve worked with elsewhere, one destination costs a single credit and another costs three. If a meaningful slice of your list is outside North America, your real cost per send has very little to do with which of these two you choose.

What format you send. MMS runs three to five times the price of SMS on the card above. Message length moves it too. When one brand we work with moved off a prepaid annual credit pool onto pay-per-message, the strategy changed within a week: less MMS unless it earned its place, and shorter copy, because length and images both move the number.

How many profiles you keep. On a profile-priced platform, your tier can’t sit below your list size. You’re not allowed to buy a smaller plan than the list you’re storing, which makes list hygiene a billing lever and not just a deliverability one.

And a fourth input that nobody puts in a table: what the pricing model does to your behavior. On a prepaid annual pool, our own strategist found herself sending wide SMS campaigns the brand wouldn’t otherwise have sent, because the credits were bought and would expire unused. The model didn’t just price the sending. It changed what got sent.

That’s the strongest argument for Postscript’s structure, and it’s worth stating plainly because it’s their own claim and we can confirm it describes something real. No prepaid balances, no expiring credits, no overages, no auto-upgrades, no profile fees. We’ve watched the opposite of each of those shape a sending plan.

The honest counterweight: a pay-per-message model makes every send a small decision, and that’s friction. Some teams respond to that by under-sending. The right answer isn’t the cheapest model, it’s the one whose incentives match how disciplined your team actually is.

These two will bid against each other

The single most commercially useful thing we can tell you is that these prices move.

We watched a founder run this process. Attentive quoted sharply once a competing offer existed. Taken to Postscript, Postscript came back better still. Taken back to Attentive, Attentive improved again. His own summary was that Postscript might well have been the better number.

Then he decided to consolidate everything into his email platform instead, and took the worse rate on purpose, because he wanted one system that could tell whether a given customer opens email or opens texts and decide accordingly. Split systems can’t do that.

Two things follow. If you’re optimizing for rate, get both to quote, because they compete hard with each other and the published card is a starting position rather than a price. And if you’re optimizing for the program, rate isn’t what you’re buying, which is why that founder paid more.

We should be straight about where that leaves our own platform of choice. Consolidating SMS into your email platform will not be the cheapest option. It generally costs more per message than either of these two. Anyone telling you otherwise is selling. The argument for consolidation is one customer record, one set of flows, and cross-channel suppression that actually works. If you want the lowest cost per message, that argument should lose.

What switching really costs

Whichever direction you go, the migration isn’t a messaging project. We’ve done one, and the flow building was the easy part, scoped in days.

The work that actually blocked it was everything around the messages. Business details the platform needs before it’ll provision sending, including brand registration and a toll-free number that has to pass verification before a single message goes out. Website terms and conditions, which had to change. Consent, collected correctly at the point of capture, which is where TCPA exposure actually sits and where both vendors put their compliance tooling. And re-pointing every system quietly subscribing people straight into the old platform, which in that case meant a checkout platform and a pop-up tool, each with its own integration feeding the thing we were leaving.

Two practical notes from that project.

Suppress before you migrate, not after. The vendor’s own guide said to upload your subscribers and then suppress the ones you don’t want. We reversed it, suppressing on the old platform first and importing only the subscribers worth keeping. On any destination that bills by profile, importing a list you’re about to suppress means paying to store people you’ve already decided to stop messaging.

Put a date on sunsetting the old platform. Until you cancel it, you’re paying both.

What the threads say, and why they are out of date

Search this comparison and most of what Google surfaces is discussion: a Reddit thread, a G2 question, and a run of comparison-directory pages built on top of them. It is worth reading them. It is also worth checking the dates.

The r/marketing thread that ranks for this is five years old. The advice in it, that Postscript is inexpensive and integrates with Shopify and Klaviyo, was true then and is still broadly true now. What it cannot tell you is that both products have since added RCS, that Postscript now sells an AI bundle and is taking signups for email, or that Attentive’s own Shopify listing now leads with email. The thread is not wrong. It is answering a question about two products that no longer exist in that form.

The more recent G2 discussion lands somewhere better, and on the thing we would also put first: at any serious revenue level, what matters in this comparison is attribution clarity. That is the right instinct. We would go one step further, because attribution clarity is not the same as knowing the channel is incremental, and the section above sets out how to tell the difference.

How to choose

Three questions, in this order.

Is your current SMS program actually built? If you’ve got two automations and no campaigns, fix that where you are. Both of these platforms will send an abandoned cart message. Neither will write your program for you, and the brands we’ve seen switch to solve this discovered that the hard way.

Where does your list live, geographically? If it’s mostly US and Canada, the published card applies and you can price this yourself today. If it isn’t, get quotes that reflect your actual destination mix before you compare anything, and check whether WhatsApp is the cheaper way to reach those markets, because that variable is bigger than the gap between these two.

Do you need software or do you need people? If your team is one or two people and you want a vendor whose staff will build and monitor things, that’s the honest case for the enterprise option, and it’s the reason one brand we work with chose it even knowing they could have built the same flows themselves. If you have got an operator, whether in-house or an agency, you’re paying for capacity you already have.

Can you already prove the channel pays for itself? If you can’t, switching won’t tell you either, because the new platform will report attributed revenue the same way the old one did. Run the holdout first. It costs you nothing and it changes what you’re shopping for.

Answer those honestly and the comparison mostly resolves itself. Which is the other reason we don’t think this is a close contest in the way the category pages present it. These two aren’t really competing for the same brand. They’re competing for the same search result.

Who we are to say any of this

YOCTO is a subscription lifecycle agency in Nicosia. We’re a Klaviyo Elite Master, 2025-2026, and we work on retention programs for subscription brands in health, beauty and wellness. The observations above come from accounts we operate, not from a feature matrix.

Frequently Asked Questions

Is Postscript cheaper than Attentive?

You can’t answer that from published information, because only Postscript publishes. Postscript’s plans run from a $0 platform fee with a $49 monthly minimum spend up to $500 a month, with per-message rates from $0.007 to $0.009 for SMS, read on 7 October 2026. Attentive quotes privately against your volume, list size and channel mix. In the one negotiation we watched closely, Postscript came back with the better number and Attentive then improved its offer, so the practical answer is to make both quote.

Does Postscript only work with Shopify?

No, though it’s built Shopify-first and that’s where its strength is. Their own FAQ addresses brands that aren’t on Shopify directly. The deeper Shopify integration shows up in segmentation built on store data, which is a real advantage if you’re on Shopify and irrelevant if you aren’t.

Does Attentive do email as well as SMS?

Yes. Attentive sells SMS, MMS, RCS, email and push, and bundles them, and its own Shopify listing now leads with email. Postscript has moved the same way, selling RCS already and taking signups for email. The old framing where one does text and the other does everything is finished.

Which one has better reviews?

They’re tied on rating and nowhere near each other on volume. On the Shopify App Store on 7 October 2026, both sit at 4.7, with 1,207 reviews for Postscript and 111 for Attentive. That gap reflects where each company sells, not which product is better built.

How much does MMS cost compared to SMS?

On Postscript’s published rates, MMS runs between three and five times the price of SMS depending on your plan, at $0.024 to $0.045 against $0.007 to $0.009. That ratio is the reason disciplined programs reserve images for messages that have earned them. In one test we ran, an image message converted a higher share of the people who clicked but earned fewer clicks overall than plain text.

What is the real cost driver in SMS?

Geography, then format, then how many profiles you store, then the platform. A brand sending to Australia can pay around four times what a comparable US sender pays for the same message. If a large share of your list sits outside North America, published US rate cards will not describe your bill.

Should I move SMS into my email platform instead?

Only if you want the program benefits, because you’ll pay more per message. One customer record, one set of flows, and suppression that works across both channels are the reasons to consolidate. Cost is not one of them, and we would rather say that than pretend otherwise. Our pricing guide sets out what that actually costs.

How do I know if SMS is actually making me money?

Hold out part of your list from SMS completely, keep everything else the same, and compare total revenue per recipient between the two groups. Do not use the platform’s attributed revenue on its own. If adding SMS means sending fewer emails to the same people, attribution will credit the channel with revenue your email program would have produced anyway.

How long does it take to switch SMS platforms?

The messaging rebuild is usually days. The rest is the project. Expect to update your website terms, re-collect consent correctly at every capture point, and re-point every integration that subscribes people into the old platform, which is typically more systems than anyone remembers. Budget for a period where you are paying both, and put a date on canceling the old one. If you are hoping to have this done before Black Friday, start now, because the consent and terms work is the slow part.

Can I negotiate SMS pricing?

Yes, and you should. Both of these vendors move on price when a competing quote exists, and we’ve watched them improve offers in sequence against each other. One caveat worth raising before you sign anything annual: a locked rate usually applies within the volume you committed to, so ask what happens to your rate on the sends above it.

Is Postscript free?

No, though its entry plan has a $0 platform fee. The Starter plan carries a $49 monthly minimum spend, and you pay per message on top at $0.009 per SMS and $0.045 per MMS, plus carrier fees passed through at cost. There is a free trial that gives you a $100 credit to spend across your first thirty days. Read on 7 October 2026.

Is Postscript still used?

Widely. Its Shopify app carries 1,207 reviews at a 4.7 rating as of 7 October 2026, against 111 for Attentive, and it is still shipping product: RCS is live, an AI bundle sells at $699 a month, and email is on a waitlist. The question usually comes from reading old threads, several of which rank for this comparison and predate most of that.

Is Attentive a legitimate company?

Yes. Attentive Mobile Inc. is an established messaging vendor with its own agency partner program, published integrations with more than 150 platforms, and a documented help center covering journeys, compliance and deliverability. The reason people ask is that it publishes no pricing, which reads as evasive if you are used to self-serve software. It is not evasive, it is enterprise sales.

What is better, Klaviyo SMS or Postscript?

They are good at different things and the honest trade is cost against consolidation. Postscript will generally be cheaper per message and gives you a published rate card. Running SMS inside Klaviyo costs more but puts texts and email on one customer record, which is what lets you suppress across channels and decide who gets which. We run programs both ways. If cost per message is the deciding factor, that argues for Postscript.

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