How many companies use Mailgun?

TechLeads currently detects Mailgun on 664,476 websites. HTTP Archive's monthly crawl, a separate dataset, detected it on 1,186,643 pages in September 2026.

Who are Mailgun's biggest competitors?

By number of websites, the largest Email technologies besides Mailgun are Google Workspace (3,246,665), Microsoft 365 (2,701,100), Hostinger Mail (938,104), MailChimp (820,056), IONOS Mail (690,910).

Which companies use Mailgun?

Websites using Mailgun include imgur.com, xkcd.com, opensea.io, zapier.com, speakerdeck.com, instapaper.com. The full list of 664,476 websites can be exported as a CSV for $29.

Mailgun market share and customers

As of October 8, 2026, Mailgun is used by 664,476 websites in the TechLeads index: 5.3% of all Email detections, the 6th most-used of 133 Email technologies.

664,476

websites using Mailgun

5.3%

share of Email

of 133 in Email

Cite this data

Quoting these numbers? Credit TechLeads with a link to this page.

Citation

TechLeads. "Mailgun Customers and Market Share." Data as of October 8, 2026. https://techleads.fyi/technology/mailgun/market-share

HTML link

<a href="https://techleads.fyi/technology/mailgun/market-share">Mailgun market share (TechLeads data)</a>

Mailgun vs competitors in Email

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	634,305

Mailgun usage over time

In HTTP Archive's monthly crawl of public websites, Mailgun was detected on 1,186,643 pages in September 2026, up 7.6% from a year earlier (peak: 1,219,378). Among the 1,000 most-visited sites, it appeared on 88. 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.

Mailgun 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.

US3,822
GB1,135
AU326
FR228
DE193
NL171
CA166
CO165
IT125
BR124

Companies using Mailgun

imgur.com
xkcd.com
opensea.io · Opensea
zapier.com · Zapier
speakerdeck.com
instapaper.com
prezi.com · Prezi Inc.
nam.edu · Social Driver
webaim.org
nymag.com · New York Magazine
udallas.edu
sanctuaryforfamilies.org · Sanctuary for Families

See all 664,476 websites using Mailgun or download the full list as a CSV for $29.

How these numbers are calculated

TechLeads scans public websites and detects Mailgun from signals in the page HTML, scripts, cookies, HTTP headers and DNS records. Market share is Mailgun'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

Mailgun accounts for 5.3% of Email detections in the TechLeads index (664,476 websites), which makes it the 6th most-used of 133 Email technologies we track.