Attentive Vs Klaviyo: A Specialist SMS Platform Or One Tool For Email And Text

Attentive and Klaviyo both send marketing texts, but they’re built around different ideas of who runs your text program. Klaviyo sells texting inside the same tool you use for email, working from one view of each customer across channels (opens in new tab). Attentive is a separate platform with its own support team, and Postscript is a third option built the same way.

For a Shopify brand whose text list is starting to bring in real revenue, the Attentive vs Klaviyo question isn’t which tool is better. It’s whether texting deserves its own platform and its own team. For most brands it doesn’t, and Klaviyo SMS running off the same profiles and flows as your email is the better setup. Attentive or Postscript beside Klaviyo makes sense for a narrower set of brands, and the reasons are specific enough to check against your own store.

Calling Attentive the text specialist and Klaviyo the email tool describes where each one started more than what each sells today. Attentive lists SMS, email, RCS and push (opens in new tab) as its channels. Klaviyo’s texting covers SMS, MMS, WhatsApp and RCS (opens in new tab), billed from the same plan, alongside its email. Postscript bills itself as a platform for SMS, RCS and email (opens in new tab), though its email is still behind a waitlist (opens in new tab).

RCS (rich communication services) is the business messaging format all three now list, so it doesn’t separate Attentive from Klaviyo. Klaviyo charges no RCS agent fees in any country (opens in new tab) for now, and RCS messages draw from the same mobile messaging plan as your SMS. You need an active RCS agent in the recipient’s country before you can send one.

Klaviyo isn’t the only tool that keeps email and texting together. Omnisend does too, and our Klaviyo vs Omnisend comparison covers which of its plans include texting and how the two charge for it.

With Klaviyo, a customer has one profile that both your emails and your texts read from. With Attentive or Postscript beside Klaviyo, the same customer has a profile in each tool, and an integration moves data between them.

Of the three, only Postscript publishes a rate card. Klaviyo publishes its email plan prices and shows its per-message texting rates inside your account. Attentive publishes no price at all and quotes through a demo form.

Klaviyo plans are priced on active profiles (opens in new tab), meaning any contact in your account you can market to. The free plan covers up to 250 active profiles and 500 emails a month, plus $5 of mobile messages a month. The paid Email plan lists the same $5 allowance, and on the Email and Marketing plans, SMS and MMS are an add-on.

Since July 13, 2026, Klaviyo has billed texting as a monthly dollar plan drawn down per message (opens in new tab), replacing the credits it used before. New accounts and accounts on a free mobile messaging plan moved straight away, and existing paid accounts moved at their first billing date after August 13, 2026. Carrier fees are built into the rate, so there’s no separate carrier line on the bill.

Your rate depends on the channel, the country you’re texting and, for US and Canadian SMS and MMS, whether you send from a toll-free number or a short code. Klaviyo shows those rates in your account under Settings > Billing > Overview rather than on its pricing page. Unused plan spend doesn’t roll over (opens in new tab) to the next month, so a plan sized for your busiest month costs you that much every month.

Message length changes the bill too. One SMS segment holds 160 characters, or 70 when the text includes an emoji or special character, and longer texts split into more segments. An MMS is billed as one message up to 1,600 characters. Our breakdown of Klaviyo pricing walks through how segments, overages and plan spend add up.

Attentive pitches its usage-based pricing (opens in new tab) as needing no credit system. That was a real difference from Klaviyo when Klaviyo sold texts in credits, and it isn’t one now that Klaviyo bills in dollars per message. The difference that’s left is that Klaviyo’s rate sits in your account and Attentive’s comes from a quote.

Attentive prices on four things: how many messages you send (opens in new tab), how big your subscriber list is, how many channels you use and which of its premium AI tools you want. Its packages run from text only, priced per message and per subscriber, through text and email, to all four channels. The top package is custom-priced and adds a dedicated customer success manager and full-service onboarding.

The AI tools are billed in different ways. AI Pro and AI Grow carry a flat monthly fee, AI Journeys is paid per click, and AI Essentials comes with every plan. Attentive offers discounts when you bundle channels or AI products, and a free trial through the same form.

Every Attentive plan includes a dedicated support team with 24/5 service, two-tap sign-up forms, A/B testing and built-in TCPA compliance tools. On Shopify, the Attentive app (opens in new tab) is free to install, and Attentive bills you directly rather than through your Shopify invoice. You get at least a 30-day free trial, then a month-to-month or longer-term plan.

Postscript publishes four plans (opens in new tab). Starter has no monthly fee but a $49 monthly minimum spend, at $0.009 per SMS and $0.045 per MMS. Growth costs $100 a month at $0.008 per SMS and $0.03 per MMS, and Professional costs $500 a month at $0.007 per SMS and $0.024 per MMS, with API access. Enterprise is custom-priced and adds a dedicated customer success manager.

Carrier fees come on top of every Postscript rate, and Postscript puts the average US carrier fee at $0.0033 per SMS and $0.00799 per MMS. A new account gets $100 of credit toward message and carrier fees in its first 30 days.

Using Postscript’s average carrier fee, a US text costs about $0.0123 on Starter, $0.0113 on Growth and $0.0103 on Professional, so 10,000 US texts a month comes to $123, $213 and $603.

Each step up saves a tenth of a cent per SMS, so the plan fee has to pay for itself in volume. Growth’s $100 fee breaks even with Starter at 100,000 texts a month. Professional’s extra $400 breaks even with Growth at 400,000 texts a month, so below that, Professional only makes sense if you need its API access.

You can’t run the same sum for Attentive or Klaviyo from their public pages, because Attentive’s rate comes from a quote and Klaviyo’s sits in your account. To compare Postscript vs Attentive vs Klaviyo on cost, take your real monthly text volume to all three. Get Klaviyo’s rate from your billing page, ask Attentive for a quote at that volume, and compare all-in figures, since Klaviyo’s rate already includes carrier fees and Postscript’s doesn’t.

Klaviyo’s texting works from the same profile as your email, so a text flow can use the customer’s profile, purchase history and engagement (opens in new tab) the way an email flow does. Klaviyo, which sells both channels, argues that keeping email and SMS in one platform gives you the whole picture of each customer. In practice, one profile means one record of consent, one opt-out and one set of flows to maintain.

Put Attentive or Postscript beside Klaviyo and every customer who’s on both lists exists twice. Consent, opt-outs, discount codes and engagement each have to cross an integration to reach the other tool. Whatever that integration doesn’t carry, or carries late, becomes a gap your team manages by hand.

Does Attentive integrate with Klaviyo? If you’re weighing Attentive alongside Klaviyo rather than instead of it, have Attentive show you the sync field by field in the demo before you sign.

Ask which way subscribers move, whether SMS consent crosses automatically, how fast an opt-out in one tool reaches the other, whether discount codes go one way or both, and whether email engagement from Klaviyo can drive segments in Attentive. Postscript’s integration, covered next, answers most of those questions, so use it as your checklist for the Attentive vs Klaviyo setup.

Postscript’s Klaviyo integration (opens in new tab) comes with every Postscript plan, and Postscript is listed in Klaviyo’s app marketplace (opens in new tab) and names Klaviyo in its Shopify app listing (opens in new tab). Connecting it takes an Owner, Admin or Manager role in Klaviyo.

From Klaviyo to Postscript, SMS subscribers collected through Klaviyo forms and popups flow across, and your Klaviyo lists and segments can be used as Postscript segments. From Postscript to Klaviyo, email addresses collected by Postscript popups flow across, along with Postscript’s dynamically generated coupons. Engagement crosses both ways: Postscript segments can target people who received or clicked a Klaviyo email, and Klaviyo segments can use clicks on links in Postscript texts.

SMS consent you’ve collected in Klaviyo doesn’t cross automatically: you export it from Klaviyo and upload it to Postscript by hand. Subscribers who come in through a list growth integration get an automatic “Reply Y to Subscribe” text, and you can’t turn it off.

Postscript updates the Accepts SMS flag in Klaviyo every five minutes (opens in new tab), so an opt-out in Postscript shows up in Klaviyo within about five minutes, and the last Postscript coupon syncs immediately. Lists and segments only sync on their own if they’re in a scheduled campaign or have been used in a campaign in the last 30 days, and anything older needs a manual sync before you rely on it.

With Postscript beside Klaviyo, a cart recovery sequence lives in two places. The emails run in Klaviyo and the text runs in Postscript, and each tool fires on its own trigger. Coordinating them means building Postscript segments from Klaviyo email activity, or the reverse, and trusting lists that only stay current while they’re in use.

In Klaviyo alone, the text is a step in the same flow as the emails, reading the same profile. Our abandoned cart flow puts a single text at the second touch, about a day after the cart is left, and that timing is easier to hold when one flow controls every message. That’s the day-to-day cost of the Postscript vs Klaviyo split, and it applies to every flow you run in both tools, not only the cart.

Both sell compliance tooling, so neither Attentive nor Klaviyo leaves you on your own here. Klaviyo has a Compliance Hub with an SMS compliance health score (opens in new tab), keeps marketing and transactional consent separate, holds texts for quiet hours by area code and offers age gating for alcohol brands. Attentive includes built-in TCPA and compliance tools (opens in new tab) on every plan, and says its in-house TCPA experts and templates keep your program compliant.

The rules themselves don’t change with the tool. Our guide to SMS marketing for ecommerce covers the consent standard, quiet hours, carrier rules and state laws you’re bound by on any platform. The tool-specific risk is the one above: if your text platform and Klaviyo hold consent separately, a gap between them is a compliance problem, not only a data problem.

A specialist makes sense when one of these four things is true for your store.

You have a team that owns texting and wants its own support. Attentive includes a dedicated support team with 24/5 service on every plan, and its custom package adds a dedicated customer success manager and full-service onboarding. Postscript’s Enterprise plan also comes with a dedicated customer success manager. If your texting program is big enough to staff separately, that support is a large part of what you’re paying for.

You send enough texts for a rate card to matter. Postscript’s published rates let you model cost before you sign, and its per-message rate falls as the plan fee rises, with break-evens at 100,000 and 400,000 texts a month. Get Klaviyo’s per-message rate from your account and compare at your real volume before assuming either one is cheaper.

You need a feature the specialist has and Klaviyo doesn’t. Attentive calls its two-tap sign-up units patented, and it sells AI tools priced on their own. Name the feature and what it’s worth to you before it becomes the reason for a second contract.

You can absorb the cost of two profiles. That means manual consent uploads, an opt-out that can take up to five minutes to cross, list syncs that lapse after 30 days unused, two bills and two flow builders. If none of the first three reasons applies, that cost buys you nothing.

Postscript vs Attentive, if you’ve decided on a specialist? The plainest difference is price transparency: Postscript publishes its rates and Attentive quotes. Attentive lists email as an available channel and includes 24/5 support on every plan, while Postscript’s email is still on a waitlist and its dedicated success manager is an Enterprise feature.

If your list is still small, you may not need either yet. Our Shopify Email vs Klaviyo comparison covers when Shopify’s own messaging tool is enough and when Klaviyo is worth the price. Klaviyo’s free plan includes $5 of mobile messages a month, so you can send a small test before you pay for a texting plan.

Once texting matters, start it in Klaviyo, on the same profiles and flows as your email. For most Shopify brands, Klaviyo SMS beats running Attentive or Postscript beside Klaviyo on one point that doesn’t show up in a price comparison: there’s one consent record, one opt-out and one flow per customer journey. Add Attentive or Postscript beside Klaviyo when a team, a volume or a feature justifies it, and get the sync spelled out before you sign.

If you’re keeping both channels in Klaviyo, our Klaviyo agency work starts with an audit of the account’s flows, segments and Shopify integration. And if you want email and texting built and measured together, BLKDG’s email and SMS marketing services build the flows, segments and text programs as one program and report them against revenue.