As of October 8, 2026, MailJet is used by 183,055 websites in the TechLeads index: 1.5% of all Email detections, the 11th most-used of 133 Email technologies.
183,055
websites using MailJet
1.5%
share of Email
#11
of 133 in Email
Cite this data
Quoting these numbers? Credit TechLeads with a link to this page.
Citation
TechLeads. "MailJet Customers and Market Share." Data as of October 8, 2026. https://techleads.fyi/technology/mailjet/market-share
In HTTP Archive's monthly crawl of public websites, MailJet was detected on 474,616 pages in September 2026, up 1.3% from a year earlier (peak: 504,105). Among the 1,000 most-visited sites, it appeared on 50. HTTP Archive is a separate dataset from the TechLeads index, so its numbers are not added to ours.
Same month, other Email technologies in HTTP Archive: Google Workspace 7,328,416, Microsoft 365 6,889,878, MailChimp 1,572,197, Sendgrid 1,280,135, Amazon SES 1,270,273.
MailJet customers by country
Based on country-code domains (such as .de or .co.uk); websites on .com and other generic domains are not assigned a country.
TechLeads scans public websites and detects MailJet from signals in the page HTML, scripts, cookies, HTTP headers and DNS records. Market share is MailJet'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.
FAQ
MailJet accounts for 1.5% of Email detections in the TechLeads index (183,055 websites), which makes it the 11th most-used of 133 Email technologies we track.