How many companies use MailChimp?

TechLeads currently detects MailChimp on 820,056 websites. HTTP Archive's monthly crawl, a separate dataset, detected it on 1,572,197 pages in September 2026.

Who are MailChimp's biggest competitors?

By number of websites, the largest Marketing automation technologies besides MailChimp are HubSpot (724,804), Klaviyo (378,341), Social Miner (229,316), MailChimp for WordPress (225,834), Sendinblue (190,288).

Which companies use MailChimp?

Websites using MailChimp include creativecommons.org, tinyurl.com, issuu.com, justgiving.com, gizmodo.com, investopedia.com. The full list of 820,056 websites can be exported as a CSV for $29.

MailChimp market share and customers

As of October 8, 2026, MailChimp is used by 820,056 websites in the TechLeads index: 18.6% of all Marketing automation detections, the 1st most-used of 506 Marketing automation technologies.

820,056

websites using MailChimp

18.6%

share of Marketing automation

of 506 in Marketing automation

Cite this data

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

Citation

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

HTML link

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

MailChimp vs competitors in Marketing automation

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

MailChimp usage over time

In HTTP Archive's monthly crawl of public websites, MailChimp was detected on 1,572,197 pages in September 2026, down 20.1% from a year earlier (peak: 2,727,674). 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, Sendgrid 1,280,135, Amazon SES 1,270,273, Mailgun 1,186,643.

MailChimp 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.

US8,680
GB3,160
FR930
AU875
DE489
NL438
IT402
CA391
BR281
ES215

Companies using MailChimp

creativecommons.org
tinyurl.com
issuu.com
justgiving.com
gizmodo.com · Gizmodo
investopedia.com · Investopedia
slate.com
globalwellnessinstitute.org · Global Wellness Institute
challonge.com
woocommerce.com · WooCommerce
people.com · People.com
phpscriptsmall.com · Phpscriptsmall

See all 820,056 websites using MailChimp or download the full list as a CSV for $29.

How these numbers are calculated

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

FAQ

MailChimp accounts for 18.6% of Marketing automation detections in the TechLeads index (820,056 websites), which makes it the 1st most-used of 506 Marketing automation technologies we track.