As of October 8, 2026, ZXCS is used by 76,420 websites in the TechLeads index: 0.62% of all Email detections, the 19th most-used of 133 Email technologies.
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Citation
TechLeads. "ZXCS Customers and Market Share." Data as of October 8, 2026. https://techleads.fyi/technology/zxcs/market-shareHTML link
<a href="https://techleads.fyi/technology/zxcs/market-share">ZXCS market share (TechLeads data)</a>Websites using each technology in the TechLeads index, and its share of all Email detections.
| # | Technology | Websites | Share |
|---|---|---|---|
| 1 | Google Workspace | 3,246,665 | 26.1% |
| 2 | Microsoft 365 | 2,701,100 | 21.7% |
| 3 | Hostinger Mail | 938,104 | 7.6% |
| 4 | MailChimp | 820,056 | 6.6% |
| 5 | IONOS Mail | 690,910 | 5.6% |
| 6 | Mailgun | 664,476 | 5.3% |
| 7 | Amazon SES |
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 76,420 websites using ZXCS or download the full list as a CSV for $29.
TechLeads scans public websites and detects ZXCS from signals in the page HTML, scripts, cookies, HTTP headers and DNS records. Market share is ZXCS's website count divided by the website counts of all Email technologies we track; a site using two Email tools counts for both. Counts were last refreshed on October 8, 2026 and update daily.
| 634,305 |
| 5.1% |
| 8 | Sendgrid | 522,101 | 4.2% |
| 9 | Yandex Mail | 194,429 | 1.6% |
| 10 | Sendinblue | 190,288 | 1.5% |
| 11 | MailJet | 183,055 | 1.5% |
| 12 | Lolipop Mail | 136,572 | 1.1% |
| 13 | ActiveCampaign | 131,218 | 1.1% |
| 14 | DMARC None | 104,042 | 0.84% |
| 15 | Creativ.eMail | 103,066 | 0.83% |
| 16 | Jimdo Mail | 97,951 | 0.79% |
| 17 | MailerLite | 88,964 | 0.72% |
| 18 | SparkPost | 82,422 | 0.66% |
| 19 | ZXCS | 76,420 | 0.62% |
| 20 | LiveIntent | 72,726 | 0.59% |
| 21 | DKIM | 64,535 | 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.