As of October 8, 2026, SparkPost is used by 82,422 websites in the TechLeads index: 0.66% of all Email detections, the 18th most-used of 133 Email technologies.
82,422
websites using SparkPost
0.66%
share of Email
#18
of 133 in Email
Cite this data
Quoting these numbers? Credit TechLeads with a link to this page.
Citation
TechLeads. "SparkPost Customers and Market Share." Data as of October 8, 2026. https://techleads.fyi/technology/sparkpost/market-share
In HTTP Archive's monthly crawl of public websites, SparkPost was detected on 205,552 pages in September 2026, up 91.4% from a year earlier (peak: 225,076). Among the 1,000 most-visited sites, it appeared on 8. 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.
SparkPost 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 SparkPost from signals in the page HTML, scripts, cookies, HTTP headers and DNS records. Market share is SparkPost'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
SparkPost accounts for 0.66% of Email detections in the TechLeads index (82,422 websites), which makes it the 18th most-used of 133 Email technologies we track.