OngoingAI

Klaviyo usage & market intelligence

OngoingAI has observed Klaviyo on 68,308 ecommerce stores across 6 platforms.

Among 67,018 stores continuously observed over the last 30 days, Klaviyo penetration moved 25.3% → 26.3%.

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Stores observed

68,308

Ecommerce stores where OngoingAI has observed it

Shopify adoption

93%

63,310 Shopify stores

Shopify rating

4.7 ★

3,293 reviews

Last checked Sep 15, 2026

Adoption movement
Installs and removals confirmed across repeat observations of the stores OngoingAI tracks

Growing — 135 more confirmed installs than removals over the past 90 days.

WindowConfirmed installsConfirmed removalsNetNewly observed
Last 30 days633535+9850,687
Last 90 days671536+13568,100

Newly observed counts first appearances of Klaviyo in OngoingAI's corpus — discovery, not necessarily a new install. Confirmed figures require the store to be seen with, then without, the app (or the reverse) across consecutive comparable scans.

What merchants actually report
4.66average· 3,077 reviews analyzed· 2,191 with written feedback
89% 5★9% ≤3★

47% of attributable reviewers are United States merchants. 43% had used the app for a year or more when they reviewed.

The developer replies to 49% of reviews overall and 53% of critical ones.

Recent reviewers rate Klaviyo 4.89, above its 4.66 lifetime average.

Rating · last 90d

4.89

Recent direction

Replies to reviews

49%

Developer response rate

Replies to critical

53%

On 3★ and below

Long-term reviewers

43%

Using 1yr+ at review

Top merchant markets

United States 47%United Kingdom 10%Australia 8%Canada 6%Germany 3%

Tenure when reviewed

under a day 6%days 14%months 37%a year or more 43%

Based on public merchant reviews, with newer feedback given more weight. OngoingAI matches each review to an identifiable store and the app they use.

Klaviyo adoption by ecommerce platform
Platforms used by stores where OngoingAI has observed Klaviyo
68,308stores
Shopify63,310 stores · 93%
93%
WooCommerce2,313 stores · 3%
3%
Magento (Adobe Commerce)1,229 stores · 2%
2%
BigCommerce907 stores · 1%
1%
PrestaShop454 stores · 1%
1%
Square Online105 stores · 0%
0%
Notable stores using Klaviyo: Email Marketing & SMS
Observed installs, highest-ranked first
StoreTraffic rankCohort
wirecutterstore.nytimes.com
#152Top 1K
shop.bbc.com
#208Top 1K
gardenshop.telegraph.co.uk
#566Top 1K
wyzecam.com
#863Top 1K
atoleajewelry.eu.com
#941Top 1K
shop.nu.nl
#1,190Top 10K
webwinkel.ad.nl
#1,198Top 10K
uk-store.msi.com
#3,333Top 10K
us.arlo.com
#3,664Top 10K
shop.ghost.org
#4,120Top 10K

Showing 10 of 68,308 stores we track running Klaviyo.

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Pricing
Free to install
FreeFree to install
  • • Sync Shopify data–tags, catalog, coupons
  • • Templates for Email/SMS
  • • Forms & push notifications
  • • Segmentation & personalization
  • • A/B testing
SMS$15/month
  • • Multi-channel segmentation and flows
  • • Smart opt-in & multi-channel list growth
  • • SMS AI for campaign creation
  • • Automated two-way conversations
  • • Transactional SMS
Email$20/month
  • • Multi-channel segmentation and flows
  • • Personalized product recommendations
  • • Reputation repair AI for deliverability
  • • Email AI for campaign creation
  • • Send time optimization
What does Klaviyo do?

Klaviyo is a leading email and sms marketing app for Shopify. Improve your marketing ROI with our templates to deliver personalized email and sms campaigns.

  • Unify and activate real-time data from Shopify and 350+ apps across the journey
  • Use Composer to build launch-ready, on-brand marketing campaigns across channels
  • Create AI-powered segments and flow triggers using historical and real-time data
  • Drive conversions with personalized email, SMS, WhatsApp, mobile push & pop-ups
  • Turn service moments into shopping moments with Customer Hub and Customer Agent

Features

Email marketingEmail campaignsSMS campaignsPush notificationsNewslettersPop-upsFormsDiscountsPromotionsUpsell emailsCross-sell emailsCart emailsCheckout emailsExit intentAbandoned cartBrowse abandonmentWelcome emailsFollow-up emailsPrice drop emailsBack-in-stock emailsWin-back emailsProduct recommendationsDrip campaignsSubscriptionsProduct reviewsCustom campaignsEditor toolTemplatesAI generationLocalizationCustom codeCustom fontsBulk editingImport and exportEmail domainsConsent collectionEmail capture listSMS capture listTriggers and rulesAutomations
Review history
Daily review count on the Shopify App Store
3,293+321 · 29d~11/day· Rating steady at 4.7★
Aug 17Sep 14

Daily tracking from Aug 10, 2026 through today · 29 days observed · sign up free for the full history →

Category rankings
Live organic position on Shopify App Store category pages
  • Email marketing#1
  • SMS marketing#1

Tracked daily · last 30 days · as of 2026-09-15

Catalog position
Within Email marketing on the App Store
Rank by reviews
#3 of 316
Review percentile
99th
Rating percentile
72th
On the App Store
14 yrs
Commonly used with
Share of Klaviyo: Email Marketing & SMS stores that also run each app
Judge.me19,627 stores
29%
Microsoft Clarity14,293 stores
21%
Instafeed (Mintt Studio)10,900 stores
16%
Shopify Inbox7,943 stores
12%
Triple Whale6,228 stores
9%
Google Ads5,650 stores
8%
Trustpilot4,965 stores
7%
Shopify Forms4,953 stores
7%
Competitors
Alternatives buyers weigh against Klaviyo: Email Marketing & SMS
See the full Klaviyo alternatives comparison
Compare Klaviyo head-to-head
Side-by-side on ratings, momentum, pricing, and adoption
All app comparisons
Works with
Integrations listed for Klaviyo: Email Marketing & SMS
CheckoutCustomer accountsShopify FlowAftershipGorgiasMeta AdvertisingRechargeTikTok AdvertisingTypeform
Apps similar to Klaviyo
The App Store's own "more apps like this" for Klaviyo
Shopify Messaging
4.7(4,472)

Free to install

Omnisend Email Marketing & SMS
4.7(3,182)

Free to install

Mailchimp Email SMS Marketing
4.8(1,457)

Free plan available

Frequently asked questions

Klaviyo is a leading email and sms marketing app for Shopify. Improve your marketing ROI with our templates to deliver personalized email and sms campaigns. It's a email marketing tool for ecommerce stores.