We have found 221,786 companies using Klaviyo as of 30 October 2026, and four in five of the ones we checked closely run their shop on Shopify. The platform says more than the industry does: about one Shopify store in six shows Klaviyo, one BigCommerce store in seven, and hardly any stores on WooCommerce, Magento or Shopware. Around Klaviyo sits a recognisable kit of Shopify apps: most sites running Rebuy, Gorgias or Recharge also run Klaviyo.
- Klaviyo says it had more than 205,000 customers at the end of June 2026. Every site where we found Klaviyo, 226,657 on 29 October, is a little higher and includes some weaker hits; on the evidence we use, 207,003 domains, the two are within a few thousand.
- 80.5% of the Klaviyo customers in our sample run Shopify. Of every BigCommerce site we track, 14.8% show Klaviyo; of Magento sites, 0.5%.
- 79% of the 13,914 sites where we found the Gorgias help desk also run Klaviyo, and so do 85% of Rebuy sites and 76% of Recharge sites. Only 2% of Omnisend sites do.
- Klaviyo is a consumer tool: 2.4% of the customers we could classify sell only to businesses, against 15.7% of companies in general.
- About 19,654 domains in our total rest on weaker evidence, mainly Klaviyo tags seen only inside Google Tag Manager and preconnect hints, nearly half of which sit on copies of one spam page. They stay in the total but are left out of every figure below, the first rows and the new customers.
How many companies use Klaviyo?
We have found Klaviyo on 221,786 company websites. Klaviyo publishes its own figure: in its results for the second quarter of 2026 it said “Total customers exceeded 205,000” on 30 June 2026.
Counting every site where we found Klaviyo gives 226,657 on 29 October, a little higher than Klaviyo’s, including about 19,654 weaker hits described below. Set those aside and the 207,003 domains left sit within a few thousand of Klaviyo’s figure. I didn’t expect them to land this close, and I wouldn’t read too much into it, because they count different things. Klaviyo defines a customer as “a distinct paid subscription to our platform”, so shops on its free plan (up to 250 profiles) aren’t in its figure but are in ours, and one business paying for several brands can count several times in its figure. We count websites where we see Klaviyo, and we miss customers we can’t see from outside, for example a shop whose website we haven’t read yet. Which way the differences net out, I can’t say.
| Evidence | Share of the list | What it means | Used in the figures below |
|---|---|---|---|
| Klaviyo’s JavaScript in the page | 90.8% | Usually there to run sign-up forms and record what visitors browse | Yes |
| Other Klaviyo code in the page | 0.5% | Klaviyo’s code recognised in the page source; every one we checked was a Shopify store | Yes |
| SPF record only | 113 domains | The domain’s email settings let Klaviyo send for it, and we found no Klaviyo code on the page | Yes |
| Google Tag Manager only | 4.4% | A tag container mentions Klaviyo; we can’t tell whether it runs | No |
| Preconnect hint only | 4.2% | The page asks the browser to connect to Klaviyo early, with no Klaviyo script after it | No |
| Old code signature | 65 domains | An earlier detection rule; none re-confirmed in the last 90 days | No |
In the total, out of the figures
About 19,654 domains in our total rest on weaker evidence. They are still in the total, but I leave them out of every figure on this page, the first rows of the list and the count of new customers. The first kind is a Klaviyo tag that shows up only inside Google Tag Manager, where we can’t tell whether it runs. When I looked at a sample, many sat on two platforms, Salla, a Saudi shop builder, and Fourthwall, which hosts merchandise shops for creators; my guess is the tag comes with those platforms’ shared templates rather than from anything the shops chose. A further 65 sites matched only an old code signature we no longer rely on; they are treated the same way.
The second kind is stranger: a preconnect hint, a line that tells the browser to open a connection to Klaviyo early, with no Klaviyo script after it. At least 4,282 of them, nearly half, sit on copies of one page template; the ones I looked at were expired domains now serving Indonesian lottery and slot pages. It’s very unlikely anyone on those domains sends Klaviyo emails. Six more domains on that template load Klaviyo’s script itself, so they count as script evidence; at six in more than 200,000 they can’t move any figure on this page, and none is among the first rows.
DNS adds very little for Klaviyo. Only 113 domains are on the list through their SPF record alone; where a site also loads the script, we record the script. My guess, which I haven’t checked, is that many brands set up Klaviyo’s sending on a subdomain we don’t look up.
Which shop platforms do Klaviyo customers run?
Shopify, overwhelmingly. Of the 3,785 Klaviyo customers in our sample, 80.5% run their shop on Shopify. The next biggest group, WooCommerce, is 5.2%. Turn it round and look at each platform’s own sites, and the pattern is sharper still.
| Platform | Share of Klaviyo customers | That platform’s sites showing Klaviyo | Based on |
|---|---|---|---|
| Shopify | 80.5% | about 18% | Estimate: too many Shopify sites to read in one go |
| WooCommerce | 5.2% | about 1% | Estimate, as above |
| BigCommerce | 1.5% | 14.8% | 3,468 of 23,416 sites |
| Salesforce Commerce Cloud | 5 of 3,785 | 10.5% | 287 of 2,740 sites |
| Shopware | 1 of 3,785 | 0.7% | 80 of 10,873 sites |
| Magento | 4 of 3,785 | 0.5% | 104 of 20,123 sites |
BigCommerce is the number I keep coming back to. In our data it is a far smaller platform than WooCommerce, yet a BigCommerce store is roughly fifteen times as likely to show Klaviyo. Salesforce Commerce Cloud sits at one in ten. Magento and Shopware are under 1%.
I think this comes down to how each platform is sold and built. Shopify and BigCommerce stores add tools from an app store with a click. Magento and Shopware shops tend to be built by agencies, often with their own email tools, and WooCommerce runs on cheap hosting where a paid email platform is a bigger step. That’s my reading of the numbers, not something the data proves. If those Shopify merchants are who you want whatever their email tool, start from our list of companies using Shopify.
The Shopify apps that come with Klaviyo
Klaviyo rarely travels alone. Take every site where we found a given app and ask how many of them also run Klaviyo. For some of the best-known Shopify apps the answer is most of them.
| App | What it does | Sites we found | Also show Klaviyo |
|---|---|---|---|
| Rebuy | Upsells and product recommendations | 2,860 | 84.8% |
| Gorgias | Help desk built for online shops | 13,914 | 79.3% |
| Recharge | Subscriptions | 1,972 | 76.3% |
| Junip | Product reviews | 1,307 | 56.8% |
| Stamped | Reviews and loyalty | 3,952 | 51.9% |
| Attentive | Text message marketing | 4,902 | 48.9% |
| Loox | Photo reviews | 9,855 | 40.9% |
| Sezzle | Pay later | 1,672 | 33.1% |
| Judge.me | Product reviews | 10,113 | 23.9% |
| Privy | Pop-ups and email | 2,837 | 11.5% |
| Omnisend | Email and SMS marketing | 3,126 | 2.0% |
Four in five Gorgias help desks we track sit on a Klaviyo site, likely because both tools work from the same Shopify order data. Rebuy goes further still at 85%, and Recharge is close behind at 76%. The review apps form a ladder: about half of Stamped and Junip sites run Klaviyo, two in five Loox sites and one in four Judge.me sites. My guess is that tracks budget, with the cheaper apps reaching shops that don’t pay for an email platform yet.
Attentive is the interesting middle case. It sells text messaging, which Klaviyo now does too, and still half of Attentive’s sites run Klaviyo for email. Omnisend is the opposite: it does the same job as Klaviyo, and only 2% of Omnisend sites show both. Privy, best known for pop-ups, sits at 12%.
What kind of company uses Klaviyo?
Consumer brands that sell online, almost without exception. Among the Klaviyo customers we could classify, nine in ten run an online shop, and fewer than one in forty sell only to businesses. Almost none put a sales team in front of the customer: the main button is “buy” nearly nine times in ten.
| Klaviyo customers | All companies | |
|---|---|---|
| Runs an online shop | 91.5% | 30.4% |
| Sells only to consumers | 80.5% | 48.4% |
| Main button says “buy” | 87.7% | 39.0% |
| Uses salespeople to close deals | 2.0% | 43.3% |
| Sells only to businesses | 2.4% | 15.7% |
| Main button says “contact us” | 4.4% | 45.6% |
Klaviyo customers are also about four times as likely as other companies to list jobs on their site (12.7% against 2.9%).
Which industries use Klaviyo the most?
Retail, by a distance: 86% of the Klaviyo customers we could place in an industry are shops and retailers, against 20% of companies overall. Health comes second by numbers; from the names I looked at, I’d guess mostly supplement, skincare and wellness brands selling direct. Every industry except retail, health included, is rarer among Klaviyo customers than among companies in general.
| Industry | Klaviyo customers | On Shopify | No shop platform found | All companies | Compared with all companies |
|---|---|---|---|---|---|
| Ecommerce and retail | 86.2% | 92.2% | 46.9% | 19.9% | 4x |
| Healthcare and life sciences | 6.4% | 5.5% | 11.7% | 12.8% | 50% less likely |
| Hospitality and travel | 3.0% | 1.2% | 15.4% | 12.4% | 80% less likely |
| Media and content | 1.2% | 0.3% | 7.4% | 12.0% | far less likely |
| Marketing and sales tech | 0.9% | 0.2% | 6.8% | 4.1% | 80% less likely |
| Professional services | 0.8% | 0.1% | 4.9% | 18.8% | far less likely |
| Education | 0.6% | 0.2% | 1.9% | 5.5% | 90% less likely |
Klaviyo without a shop
One in eight Klaviyo customers in the sample (463 of 3,785) shows no shop platform we recognise. About half of those we could classify still sell online, likely on a custom or headless store we can’t identify. The rest are where Klaviyo’s reach outside retail shows: hotels and travel firms are 15% of this group, then health, publishers and a scattering of software companies (10 of the 176 we could classify sell software by subscription). Professional services firms barely appear anywhere: 0.8% of Klaviyo customers, against 18.8% of companies in general.
What else do Klaviyo customers use?
Beyond Shopify, the usual companions are Google Workspace (37%) and Microsoft 365 (23%) for email, and Mailgun (6%). The help desks are telling. Across the whole list, 11,027 of the 207,003 Klaviyo customers with the evidence we use also run Gorgias, about 5%, and Zendesk turns up on about 3% of the sample, both far above their rate elsewhere.
| Software | Share of Klaviyo customers | On Shopify | Not on Shopify | Compared with other companies |
|---|---|---|---|---|
S  | 80.4% | 100.0% | 0.0% | 23x |
G  | 37.3% | 39.6% | 27.6% | 2.5x |
M  | 23.2% | 22.6% | 25.8% | 1.4x |
G  | 21.8% | 14.6% | 51.3% | about average |
F  | 11.2% | 5.4% | 35.3% | 2.0x |
W  | 10.4% | 0.6% | 50.7% | 70% less likely |
W  | 5.9% | 0.0% | 30.0% | 1.4x |
M  | 5.7% | 6.4% | 3.0% | 7x |
G  | 4.6% | 5.7% | 0.0% | far more common |
M  | 3.3% | 2.6% | 6.1% | 4x |
Z  | 2.7% | 2.6% | 3.0% | 5x |
L  | 2.2% | 2.6% | 0.2% | far more common |
T  | 1.8% | 1.4% | 3.4% | about 7x |
H  | 1.8% | 1.0% | 4.9% | 1.3x |
W  | 1.2% | 1.3% | 0.8% | 90% less likely |
S  | 0.9% | 0.0% | 4.7% | 80% less likely |
Two columns look odd and are worth a warning. On Shopify stores we find Facebook’s ad pixel on 5% and Google Analytics on 15%; off Shopify, on 35% and 51%. I doubt Shopify merchants advertise less. More likely Shopify runs their tracking through its own system for customer events, which doesn’t show in the page we read. So for a Shopify store, a missing ad pixel tells you little.
Mailchimp turns up on about 3% of Klaviyo customers, nearly four times its rate elsewhere. My guess is that some run a second list, such as a newsletter kept separately, and some have old code left behind. Our list of companies using Mailchimp shows which evidence each one rests on.
Where are Klaviyo customers based?
Country is the thinnest data on this page: we have it for roughly one Klaviyo customer in seven. The United States is just under half of those. Australia looks second, but one crawl batch produces that: 64 of its 77 companies come from a single stretch of our database, and in the rest of the sample Australia is about 4%. So I’d read the table as the US first and a long tail of English-speaking and northern European countries after it, not as a ranking.
| Country | Share of those whose country we know |
|---|---|
| United States | 45.2% |
| Australia | 13.4% |
| Canada | 7.0% |
| Germany | 5.9% |
| United Kingdom | 4.5% |
| New Zealand | 3.8% |
| Denmark | 3.7% |
| France | 3.5% |
| Netherlands | 3.0% |
| Spain | 1.7% |
Which well-known brands use Klaviyo?
Mostly direct-to-consumer brands. In our sample, one Klaviyo customer in twelve (316 of 3,785) appears in Tranco’s ranking of the million most visited websites, but only 13 make the top 100,000 and one the top 10,000.
For the first rows of the list I checked 358 consumer brands by hand. We found Klaviyo’s script on 92 of them, among them Wyze, Birkenstock, Reebok, Everlane, Glossier, Stanley and Away, and a Klaviyo tag only inside Google Tag Manager on five more, which are in our total but not in the first rows. We found no Klaviyo at all on the best-known names I tried, including Nike, Adidas, Lululemon, Sephora, Zara and Target. My guess is those retailers run their own shop software and email systems that leave no Klaviyo code on the page. For scale, Klaviyo says 4,477 of its customers were worth more than $50,000 a year in recurring revenue at 30 June 2026.
How does Klaviyo compare with other email marketing tools?
Among the email and text marketing tools we can see from outside, Klaviyo ranks #2 by company websites.
Every count in the chart, Klaviyo’s included, takes in each tool’s weaker evidence too, so compare them loosely. Klaviyo’s script sits on the page to run sign-up forms and track visits, which makes it easy to see; tools that only send email are harder to spot from a website.
How many companies start using Klaviyo each week?
From 6 October 2026 to today we have caught 0 new Klaviyo customers. A company counts when Klaviyo appears on a domain where an earlier check had not found it; some are sites we could only read properly for the first time. We start on 6 October because an earlier full re-scan made thousands of tools look new on a single day.
That is a trickle, and it says nothing about how fast Klaviyo is selling. The count depends partly on when we happen to re-check each site: about a quarter of the list was last confirmed in late September or earlier, so starts on those sites wait for the next visit. And most shops add Klaviyo when they launch, before we have ever read their site, so they join our list already using it. Tag Manager-only, preconnect and old signature hits are left out of this count too.
Putting the Klaviyo list to work
- Shopify app makers. A Klaviyo site is very likely a Shopify store with a budget for paid apps, and Klaviyo integrations are a common selling point.
- Email and retention agencies. Klaviyo customers already pay for the platform agencies specialise in; filter by country or industry to find your niche.
- Competing email and text tools looking for brands to win over, and text-message tools looking for brands that send email but not texts yet.
- Review, loyalty, returns and subscription apps, using the companions above to find stores that don’t run your category yet.
Pro opens every row, lets you narrow it by country, industry, business model or evidence type (keep only script hits, say), and emails you each week’s new Klaviyo customers. You can download 100,000 companies a month on Pro and 1,000,000 on Business. The 7-day trial needs no card and includes 1,000 downloads.
If you work in Claude Code, one command connects it to our MCP server:
claude mcp add --transport http agentdata https://mcp.useagentdata.com/mcpIt asks you to sign in to your AgentData account the first time. After that you can ask, say, for online shops in Australia that started using Klaviyo since October.
How we built this list
Everything here starts with AgentDataBot, our crawler, visiting a company’s homepage and a few other public pages and looking up its DNS. Three kinds of evidence carry the figures on this page, in order of strength:
- Klaviyo’s script, loaded from
static.klaviyo.com, on the page (91% of the list, and more than 99% of the rows the figures use) - Other Klaviyo code recognised in the page source, labelled “page code” in the list
- An SPF record that includes
_spf.klaviyo.com(113 domains with no Klaviyo code on the page)
A preconnect hint on its own, a Klaviyo tag seen only inside Google Tag Manager, or a match on our old code signature also puts a company in the total, but for the reasons given near the top those rows are left out of every figure, the first rows and the new customers.
Counted in full on 29 October 2026: how each company was found, the app shares, and the share of BigCommerce, Salesforce Commerce Cloud, Shopware and Magento sites showing Klaviyo. The Shopify and WooCommerce shares are estimates. Everything else rests on 3,785 Klaviyo customers read from 160 short stretches of our database spread across five eighths of the table. Comparisons with “all companies” use either 184,204 company profiles or 3,003 companies picked from the whole database. The headline total, the new customers and the email-tool chart refresh by themselves.
Two figures on this page come from Klaviyo rather than from our crawler: the 205,000-plus customers and the 4,477 worth more than $50,000 a year in recurring revenue, both at 30 June 2026.
