# Klaviyo vs Omnisend vs Attentive: which is the right email-and-SMS stack for a $20M-$100M Shopify Plus brand?

Reviewed by Martin Dejnicki, Director of SEO & AI Search · facts verified October 7, 2026 · canonical: https://deploi.ca/shopify/faq/klaviyo-vs-omnisend-vs-attentive-20m-100m-gmv

## Short answer

Klaviyo wins email and segmentation for a $20M to $100M Shopify Plus brand; SMS (text messaging) is a separate decision. Add Attentive only when SMS has its own team, and Omnisend only when budget outranks segmentation depth. Klaviyo's SMS consent block runs on Plus checkout pages ([Klaviyo Help Center](https://help.klaviyo.com/hc/en-us/articles/35067557759771), October 2026), so Attentive's checkout edge has narrowed.

- **Klaviyo entry prices:** $20 a month email, $15 a month SMS. Email at 251 to 500 contacts. SMS is $15 of monthly message spend at per-message rates by country (and, in the US and Canada, number type), carrier fees included; dollar rates replaced credits on 13 July 2026. ([Klaviyo, Klaviyo: Email Marketing & SMS on the Shopify App Store](https://apps.shopify.com/klaviyo-email-marketing); [Klaviyo, Pricing](https://www.klaviyo.com/pricing); [Klaviyo Help Center, FAQ on Mobile Messaging per-message pricing](https://help.klaviyo.com/hc/en-us/articles/52952739755931))
- **Omnisend entry prices:** $16 Standard, $59 Pro a month. Standard covers up to 500 contacts and Pro up to 2,500, both rising with the list, 30% off when 3 months are paid upfront; SMS from $0.007 a message at high US volume. ([Omnisend, Omnisend Email Marketing & SMS on the Shopify App Store](https://apps.shopify.com/omnisend); [Omnisend, Email and SMS pricing plans](https://www.omnisend.com/pricing/))
- **Attentive published price:** None. Free to install with a minimum 30-day free trial; pricing is tailored to message volume, list size, channels and AI products. ([Attentive, Attentive: AI-led Email & SMS on the Shopify App Store](https://apps.shopify.com/attentive); [Attentive, Pricing](https://www.attentive.com/pricing))
- **Klaviyo checkout consent block:** Checkout steps on Shopify Plus only. Other plans place it on Thank you and Order status pages. Shopify's built-in checkout checkbox syncs SMS consent to Klaviyo, Omnisend and Attentive on any plan. ([Klaviyo Help Center, How to collect SMS and/or WhatsApp consent on Shopify checkout pages](https://help.klaviyo.com/hc/en-us/articles/35067557759771); [Klaviyo Help Center, How to collect SMS marketing consent at checkout on Shopify](https://help.klaviyo.com/hc/en-us/articles/360056824732); [Omnisend Help Center, Understand SMS opt-in methods](https://support.omnisend.com/en/articles/3529761-understand-sms-opt-in-methods); [Attentive Help Center, Set up marketing subscriber collection for Shopify](https://help.attentive.com/hc/en-us/articles/4408058397588-Set-up-marketing-subscriber-collection-for-Shopify))

## Deploi's call

Klaviyo is the right email and segmentation platform for a $20M to $100M Shopify Plus brand, with a dedicated SMS (text message) lane only where SMS is a primary channel with its own team. We score the email-and-SMS stack as two purchases rather than one. Omnisend fits only where budget consolidation outranks segmentation depth. The single-vendor stack usually loses on SMS operating depth rather than on price (Deploi verdict, September 2026).

**BUY: Run Klaviyo for email and SMS when**

- Email leads and SMS supports it, so one team can run both channels from one customer profile and one set of automations.
- Segmentation depth or a catalog localized per market is the reason marketing wants the tool.
- SMS stays under roughly a fifth of owned revenue, a Deploi rule of thumb rather than a published benchmark.
- You are on Shopify Plus and want consent captured on the checkout steps themselves ([Klaviyo Help Center](https://help.klaviyo.com/hc/en-us/articles/35067557759771), October 2026).

**BUY: Add Attentive as a dedicated SMS lane when**

- SMS has its own owner, its own revenue target and someone driving list growth every day ([Deploi Build vs. Buy](https://deploi.ca/shopify/build-vs-buy/klaviyo-vs-attentive), October 2026).
- SMS passes roughly a fifth of owned revenue, the same Deploi rule of thumb.
- High-frequency promotional sends make a managed relationship worth a contract price Attentive does not publish ([Attentive pricing](https://www.attentive.com/pricing), October 2026).
- You want the vendor, not your team, to carry onboarding, deliverability and compliance support.

## What do Klaviyo, Omnisend and Attentive show on their listings and pricing pages?

Klaviyo, Omnisend and Attentive tie on Shopify App Store ratings and split on price. Klaviyo and Omnisend publish email prices by list size and SMS (text message) prices by message. Attentive publishes no price: its pricing is "tailored to your business needs" ([attentive.com](https://www.attentive.com/pricing), October 2026).

**Klaviyo and Omnisend publish prices that scale with the list; Attentive publishes none**

| Figure | Klaviyo | Omnisend | Attentive |
| --- | --- | --- | --- |
| App Store rating | 4.7 stars, 3,357 reviews, since 2012 | 4.7 stars, 3,186 reviews, since 2014 | 4.7 stars, 111 reviews, since 2020 |
| Entry plans (USD a month) | Email $20 at 251 to 500 contacts; SMS from $15 of message spend at per-message rates, carrier fees included | Standard $16 to 500 contacts, Pro $59 to 2,500; SMS from $0.007 a message at high US volume | Not published; free to install, 30-day minimum free trial |
| Large accounts | Scales with active profiles; enterprise plans custom, "Contact sales" | Published list-size selector; Custom plan quoted | "Tailored"; no figures |

Sources: [Klaviyo, Klaviyo: Email Marketing & SMS on the Shopify App Store](https://apps.shopify.com/klaviyo-email-marketing); [Omnisend, Omnisend Email Marketing & SMS on the Shopify App Store](https://apps.shopify.com/omnisend); [Attentive, Attentive: AI-led Email & SMS on the Shopify App Store](https://apps.shopify.com/attentive); [Klaviyo, Pricing](https://www.klaviyo.com/pricing); [Omnisend, Email and SMS pricing plans](https://www.omnisend.com/pricing/); [Attentive, Pricing](https://www.attentive.com/pricing); [Klaviyo Help Center, FAQ on Mobile Messaging per-message pricing](https://help.klaviyo.com/hc/en-us/articles/52952739755931). Verified October 7, 2026.

Ratings cannot separate the three. Review counts describe how each vendor sells, not product quality. Attentive sells on contract after a free trial ([Shopify App Store](https://apps.shopify.com/attentive), October 2026). In our judgment, enterprise buyers rarely leave App Store reviews, so Attentive's 111 reviews beside Klaviyo's 3,357 signal distribution, not quality.

## Where do Klaviyo, Omnisend and Attentive differ on checkout consent and Shopify Markets?

Klaviyo, Omnisend and Attentive differ least at checkout and most on Shopify Markets. All three sync SMS (text message) consent from Shopify's built-in checkbox ([Shopify Help Center](https://help.shopify.com/en/manual/promoting-marketing/create-marketing/customer-contact-information), October 2026), so checkout capture alone does not separate them. Only Klaviyo documents a catalog localized per market.

**All three take checkout consent through Shopify's checkbox; Klaviyo goes furthest on Plus checkout steps and Markets**

| Capability | Klaviyo | Omnisend | Attentive |
| --- | --- | --- | --- |
| Checkout SMS consent | Shopify's checkbox on any plan; own block on checkout steps on Shopify Plus only, Thank you and Order status pages on all plans | Shopify's checkbox, synced with subscription status | Shopify's checkbox, which it recommends over its older custom checkout checkbox |
| Shopify Markets | Locale on profiles and orders; catalog localized per region and language; no B2B (business-to-business) or Retail markets | Country, order currency and market domains; no translation sync; campaign currency set by hand | Not in its Shopify integration guide; revenue converted to one account currency |

Sources: [Klaviyo Help Center, How to collect SMS and/or WhatsApp consent on Shopify checkout pages](https://help.klaviyo.com/hc/en-us/articles/35067557759771); [Klaviyo Help Center, How to collect SMS marketing consent at checkout on Shopify](https://help.klaviyo.com/hc/en-us/articles/360056824732); [Omnisend Help Center, Understand SMS opt-in methods](https://support.omnisend.com/en/articles/3529761-understand-sms-opt-in-methods); [Attentive Help Center, Set up marketing subscriber collection for Shopify](https://help.attentive.com/hc/en-us/articles/4408058397588-Set-up-marketing-subscriber-collection-for-Shopify); [Klaviyo Help Center, How to use Shopify Markets with Klaviyo](https://help.klaviyo.com/hc/en-us/articles/45224022467739); [Omnisend Help Center, Use Shopify Markets data in Omnisend](https://support.omnisend.com/en/articles/8975075-use-shopify-markets-data-in-omnisend); [Attentive Help Center, Currency conversion](https://help.attentive.com/hc/en-us/articles/40365796140436-Currency-Conversion); [Attentive Help Center, Shopify integration](https://help.attentive.com/hc/en-us/articles/360041854231-Shopify); [Shopify Help Center, Collecting customer contact information](https://help.shopify.com/en/manual/promoting-marketing/create-marketing/customer-contact-information). Verified October 7, 2026.

Multi-currency brands should check [how Klaviyo reports revenue across Shopify Markets currencies](https://deploi.ca/shopify/faq/klaviyo-shopify-markets-multi-currency-multi-language) before relying on that sync.

## Why is the email-and-SMS stack two purchases rather than one at $20M to $100M?

At $20M to $100M the email-and-SMS (text message) stack is two separate purchases, because the two layers fail in different ways.

**Purchase one: the email and customer-data layer.** This is where segmentation, lifecycle automation and reporting live. It is also the expensive layer to change later, because [a Klaviyo migration at this size is paced by deliverability, not build hours](https://deploi.ca/shopify/faq/klaviyo-migration-timeline-from-mailchimp-activecampaign). Klaviyo's case here is depth: profile-level segmentation, automations that branch on customer behavior, a catalog localized per market and data from 350+ integrations ([Shopify App Store](https://apps.shopify.com/klaviyo-email-marketing), October 2026). Those integrations are where [Klaviyo implementation scope grows at $50M](https://deploi.ca/shopify/faq/klaviyo-implementation-scope-5m-vs-50m-brands). Omnisend's case is that the depth costs money most brands do not use; its listing names 250+ integrations ([Omnisend on the Shopify App Store](https://apps.shopify.com/omnisend), October 2026).

**Purchase two: the SMS lane.** SMS carries its own operating questions: list growth, compliance and carrier escalations. It deserves its own decision, made on who will run it rather than on which vendor already sends your email.

## When does SMS justify a dedicated vendor such as Attentive?

SMS (text message) justifies a dedicated vendor when it is a primary channel with its own owner, because what Attentive sells now is the operating layer rather than collection. Attentive's historic argument was collection at checkout, and it has narrowed. Klaviyo's own SMS consent block runs on Shopify Plus checkout steps; on other plans it sits only on Thank you and Order status pages ([Klaviyo Help Center](https://help.klaviyo.com/hc/en-us/articles/35067557759771), October 2026). Attentive's own help center recommends Shopify's built-in checkbox over its older custom checkout checkbox ([Attentive Help Center](https://help.attentive.com/hc/en-us/articles/4408058397588-Set-up-marketing-subscriber-collection-for-Shopify), October 2026). A $20M to $100M brand on Plus is on the right side of the Klaviyo gate.

What remains Attentive's is the operating layer: patented two-tap sign-up units ([Attentive's App Store listing](https://apps.shopify.com/attentive), October 2026), plus strategic planning, onboarding and deliverability support, a dedicated support team and built-in Telephone Consumer Protection Act (TCPA) compliance tools on every plan ([Attentive pricing](https://www.attentive.com/pricing), October 2026). Whether that is worth an unpublished price depends on how much of your revenue runs through SMS, and on whether anyone on your team wants to own carrier escalations. For staffed two-way texting, [Postscript and Attentive split on who writes the replies](https://deploi.ca/shopify/faq/postscript-vs-attentive-two-way-conversational-sms).

## When is Klaviyo, Omnisend or an Attentive-led stack the right platform?

Klaviyo as a single vendor is the right platform for most $20M to $100M brands; a split stack, Omnisend and an Attentive-led stack each fit a narrower case.

- **Klaviyo, single vendor:** fits where international is real and segmentation depth is why marketing wants the tool. You get one customer profile and one invoice for email and SMS (text message), and give up the SMS operating depth a dedicated vendor adds. This is the email-led verdict in [Deploi's Klaviyo vs. Attentive record](https://deploi.ca/shopify/build-vs-buy/klaviyo-vs-attentive). If reviews matter, [Klaviyo Reviews is gated by ecommerce platform, not Shopify plan](https://deploi.ca/shopify/faq/klaviyo-product-reviews-platform-availability) ([Klaviyo](https://www.klaviyo.com/products/review-management), October 2026).
- **Klaviyo for email plus a dedicated SMS vendor:** fits once SMS has its own team. You gain SMS operating depth and pay for it with two invoices, two integrations and two consent records to keep in sync.
- **Omnisend:** fits a single-market catalog where budget outranks segmentation depth, because Shopify Markets translations do not sync to Omnisend ([Omnisend Help Center](https://support.omnisend.com/en/articles/8975075-use-shopify-markets-data-in-omnisend), October 2026). Omnisend publishes its prices up to a quoted Custom plan ([Omnisend pricing](https://www.omnisend.com/pricing/), October 2026). [Deploi's Klaviyo vs. Omnisend record](https://deploi.ca/shopify/build-vs-buy/klaviyo-vs-omnisend) sets out the budget-versus-depth trade.
- **Attentive-led:** fits when SMS is the primary owned channel and the brand will pay for a managed program at a contract price Attentive does not publish ([Attentive pricing](https://www.attentive.com/pricing), October 2026). This is the SMS-first case in [Deploi's Omnisend vs. Attentive record](https://deploi.ca/shopify/build-vs-buy/omnisend-vs-attentive).

## When should a brand skip the Klaviyo, Omnisend and Attentive comparison?

Skip the Klaviyo, Omnisend and Attentive comparison when the problem it would solve is not the platform.

> **When not to do this**
> - **When the real problem is data hygiene.** No platform fixes duplicate profiles, broken consent records or an unreconciled customer identity.
> - **When the brand has not measured owned-channel revenue by flow.** You cannot choose a tool for a channel you have not sized.
> - **When the trigger is a renewal quote.** A renewal quote is a negotiation, not an architecture decision, and rebuilding a lifecycle program to save on a line item rarely nets out.
> - **When you are inside a replatform.** Change one thing at a time, because [rebuilding flows after a replatform](https://deploi.ca/shopify/faq/klaviyo-flows-to-rebuild-first-after-replatform) while changing email platform in the same quarter makes every regression unattributable.
> - **When campaign email and basic SMS (text message) are the whole program.** Shopify Messaging now sends email, SMS and WhatsApp campaigns, and email and SMS automations, from the admin on every plan ([Shopify Help Center](https://help.shopify.com/en/manual/promoting-marketing/create-marketing/shopify-messaging), October 2026). [Whether a Plus brand can drop Klaviyo for it](https://deploi.ca/shopify/faq/klaviyo-vs-native-email-on-shopify-plus) turns on what your flows condition on.

## Deploi's point of view

**What we've seen.** The brands that regret the single-vendor choice regret it on SMS, not on email, and they regret it later, once SMS has grown into a channel that needs someone to own carrier and compliance questions. The brands that regret splitting regret it immediately, on integration overhead, and then stop regretting it.

**Where we disagree.** The standard comparison still gives Attentive the checkout-collection advantage. That was true and it is now narrower: Klaviyo collects SMS and WhatsApp consent on Shopify checkout pages for Plus merchants. If you are choosing Attentive, choose it for the enterprise SMS operation, which is real, rather than for a collection advantage that has partly closed.

**What this page adds to our own decision records.** Our three head-to-head records compare these platforms in pairs. This page is the three-way read at one revenue band, and it argues the pairs are the wrong frame: the real split is email-and-data versus SMS, not vendor versus vendor.

## When this answer changes

- Attentive publishes a rate card, or prices on its Shopify App Store listing.
- Klaviyo opens its checkout consent block to the checkout steps below Shopify Plus, or Shopify changes which plans can add blocks there.
- Klaviyo starts syncing wholesale (B2B) or Retail markets, or Omnisend starts syncing Shopify Markets translations.
- Klaviyo or Omnisend changes its contact tiers or per-message SMS rates.
- Shopify Messaging gains the segmentation and flow branching that close its data gap with Klaviyo.
- SMS passes roughly a fifth of your owned revenue, or gets its own owner and target (Deploi rule of thumb).

## Follow-up questions

- [Does switching from Klaviyo to a Shopify-native-only email tool make sense once a brand hits Shopify Plus, or does Klaviyo stay worth it?](https://deploi.ca/shopify/faq/klaviyo-vs-native-email-on-shopify-plus)
- [What's the actual Klaviyo implementation scope difference between a $5M brand and a $50M brand on Shopify Plus?](https://deploi.ca/shopify/faq/klaviyo-implementation-scope-5m-vs-50m-brands)
- [Does Klaviyo support Shopify Markets for a multi-currency, multi-language mid-market brand?](https://deploi.ca/shopify/faq/klaviyo-shopify-markets-multi-currency-multi-language)
- [Is Klaviyo's product-review feature actually gated to Shopify and Shopify Plus only, or does it work on any ecommerce platform?](https://deploi.ca/shopify/faq/klaviyo-product-reviews-platform-availability)
- [How does a mid-market Shopify brand decide which Klaviyo flows to rebuild first after a full replatform, given limited implementation hours?](https://deploi.ca/shopify/faq/klaviyo-flows-to-rebuild-first-after-replatform)
- [How long does a full Klaviyo migration off Mailchimp or ActiveCampaign realistically take for a $20M+ GMV Shopify Plus brand?](https://deploi.ca/shopify/faq/klaviyo-migration-timeline-from-mailchimp-activecampaign)

## Sources

1. [Klaviyo, Klaviyo: Email Marketing & SMS on the Shopify App Store](https://apps.shopify.com/klaviyo-email-marketing), checked October 7, 2026
2. [Omnisend, Omnisend Email Marketing & SMS on the Shopify App Store](https://apps.shopify.com/omnisend), checked October 7, 2026
3. [Attentive, Attentive: AI-led Email & SMS on the Shopify App Store](https://apps.shopify.com/attentive), checked October 7, 2026
4. [Klaviyo, Pricing](https://www.klaviyo.com/pricing), checked October 7, 2026
5. [Omnisend, Email and SMS pricing plans](https://www.omnisend.com/pricing/), checked October 7, 2026
6. [Attentive, Pricing](https://www.attentive.com/pricing), checked October 7, 2026
7. [Klaviyo Help Center, How to collect SMS and/or WhatsApp consent on Shopify checkout pages](https://help.klaviyo.com/hc/en-us/articles/35067557759771), checked October 7, 2026
8. [Klaviyo Help Center, How to collect SMS marketing consent at checkout on Shopify](https://help.klaviyo.com/hc/en-us/articles/360056824732), checked October 7, 2026
9. [Omnisend Help Center, Understand SMS opt-in methods](https://support.omnisend.com/en/articles/3529761-understand-sms-opt-in-methods), checked October 7, 2026
10. [Attentive Help Center, Set up marketing subscriber collection for Shopify](https://help.attentive.com/hc/en-us/articles/4408058397588-Set-up-marketing-subscriber-collection-for-Shopify), checked October 7, 2026
11. [Klaviyo Help Center, How to use Shopify Markets with Klaviyo](https://help.klaviyo.com/hc/en-us/articles/45224022467739), checked October 7, 2026
12. [Omnisend Help Center, Use Shopify Markets data in Omnisend](https://support.omnisend.com/en/articles/8975075-use-shopify-markets-data-in-omnisend), checked October 7, 2026
13. [Attentive Help Center, Currency conversion](https://help.attentive.com/hc/en-us/articles/40365796140436-Currency-Conversion), checked October 7, 2026
14. [Attentive Help Center, Shopify integration](https://help.attentive.com/hc/en-us/articles/360041854231-Shopify), checked October 7, 2026
15. [Klaviyo, Customer and product reviews platform](https://www.klaviyo.com/products/review-management), checked October 7, 2026
16. [Shopify Help Center, Multi-channel marketing with Shopify Messaging](https://help.shopify.com/en/manual/promoting-marketing/create-marketing/shopify-messaging), checked October 7, 2026
17. [Shopify Help Center, Collecting customer contact information](https://help.shopify.com/en/manual/promoting-marketing/create-marketing/customer-contact-information), checked October 7, 2026
18. [Klaviyo Help Center, FAQ on Mobile Messaging per-message pricing](https://help.klaviyo.com/hc/en-us/articles/52952739755931), checked October 7, 2026
19. [Deploi Build vs. Buy, Klaviyo vs. Attentive on Shopify: Which SMS Platform Wins?](https://deploi.ca/shopify/build-vs-buy/klaviyo-vs-attentive), checked October 7, 2026, Deploi research
20. [Deploi Build vs. Buy, Klaviyo vs. Omnisend: Which Email Platform Wins on Shopify?](https://deploi.ca/shopify/build-vs-buy/klaviyo-vs-omnisend), checked October 7, 2026, Deploi research
21. [Deploi Build vs. Buy, Omnisend vs. Attentive on Shopify: Which Email + SMS Platform Wins?](https://deploi.ca/shopify/build-vs-buy/omnisend-vs-attentive), checked October 7, 2026, Deploi research