As of October 8, 2026, Klaviyo is used by 378,341 websites in the TechLeads index: 8.6% of all Marketing automation detections, the 3rd most-used of 506 Marketing automation technologies.
Quoting these numbers? Credit TechLeads with a link to this page.
Citation
TechLeads. "Klaviyo Customers and Market Share." Data as of October 8, 2026. https://techleads.fyi/technology/klaviyo/market-shareHTML link
<a href="https://techleads.fyi/technology/klaviyo/market-share">Klaviyo market share (TechLeads data)</a>Websites using each technology in the TechLeads index, and its share of all Marketing automation detections.
| # | Technology | Websites | Share |
|---|---|---|---|
| 1 | MailChimp | 820,056 | 18.6% |
| 2 | HubSpot | 724,804 | 16.4% |
| 3 | Klaviyo | 378,341 | 8.6% |
| 4 | Social Miner | 229,316 | 5.2% |
| 5 | MailChimp for WordPress | 225,834 | 5.1% |
| 6 | Sendinblue | 190,288 | 4.3% |
| 7 | HighLevel | 157,057 |
In HTTP Archive's monthly crawl of public websites, Klaviyo was detected on 762,495 pages in September 2026, up 5.8% from a year earlier (peak: 771,772). HTTP Archive is a separate dataset from the TechLeads index, so its numbers are not added to ours.
Same month, other Marketing Automation technologies in HTTP Archive: HubSpot 1,314,777, Pardot 318,723, Salesforce Marketing Cloud Account Engagement 308,609, MailChimp for WordPress 274,006, PushOwl 157,351.
Based on country-code domains (such as .de or .co.uk); websites on .com and other generic domains are not assigned a country.
See all 378,341 websites using Klaviyo or download the full list as a CSV for $29.
TechLeads scans public websites and detects Klaviyo from signals in the page HTML, scripts, cookies, HTTP headers and DNS records. Market share is Klaviyo's website count divided by the website counts of all Marketing automation technologies we track; a site using two Marketing automation tools counts for both. Counts were last refreshed on October 8, 2026 and update daily.
| 3.6% |
| 8 | ActiveCampaign | 131,218 | 3.0% |
| 9 | OneSignal | 128,905 | 2.9% |
| 10 | Salesforce Marketing Cloud Account Engagement | 124,300 | 2.8% |
| 11 | Hubspot Forms | 111,877 | 2.5% |
| 12 | MailerLite | 88,964 | 2.0% |
| 13 | Adobe Analytics | 85,355 | 1.9% |
| 14 | Tidio | 70,238 | 1.6% |
| 15 | PushOwl | 61,343 | 1.4% |
| 16 | Omnisend | 56,345 | 1.3% |
| 17 | Constant Contact | 49,102 | 1.1% |
| 18 | RD Station | 41,811 | 0.95% |
| 19 | Mailmunch | 25,567 | 0.58% |
| 20 | Cloud Technologies | 24,786 | 0.56% |
| 21 | Zoho PageSense | 22,807 | 0.52% |
Rows link to each competitor's market share page where one exists. The table lists the 21 most-used technologies; ranks are by website count.