Email marketing in the UK: market share ranking

Newsletter sign-ups and email platforms.

#	Technology	United Kingdom	Global	Netherlands	Italy	Spain	Japan	Latin America
1	Klaviyo	4.7%	0.6%	2.7%	1.8%	2%	0.4%	0.9%
2	Mailchimp	3.9%	1%	2.7%	1.7%	1.6%	0.2%	1%
3	Omnisend	0.4%	0.1%	0.1%	0.2%	0.1%	0.2%	0.2%
4	Brevo (Sendinblue)	0.4%	0.2%	0.5%	1.9%	1.2%	<0.1%	0.4%
5	OptinMonster	0.3%	0.3%	0.4%	0.2%	0.1%	<0.1%	<0.1%
6	MailerLite	0.2%	0.1%	0.2%	<0.1%	0.3%	<0.1%	<0.1%
7	ActiveCampaign	<0.1%	<0.1%	0.3%	0.2%	0.3%	0%	0.2%
8	Kit (ConvertKit)	<0.1%	<0.1%	<0.1%	0%	0%	0%	0%
9	Privy	<0.1%	<0.1%	0%	0%	0%	<0.1%	<0.1%
10	GetResponse	<0.1%	<0.1%	0%	<0.1%	0%	0%	0%
11	Sumo	<0.1%	<0.1%	0%	<0.1%	0%	0%	0%

By site popularity

Share of measured sites in each Tranco popularity band that use the technology: the top 1,000, 10,000 and 100,000 sites and the whole top million.

#	Technology	Top 10K	Top 100K	Top 1M
1	Klaviyo	0%	0.7%	4.7%
2	Mailchimp	0%	2.1%	3.9%
3	Omnisend	0%	0%	0.4%
4	Brevo (Sendinblue)	0%	0.1%	0.4%
5	OptinMonster	0%	0.2%	0.3%
6	MailerLite	0%	0%	0.2%
7	ActiveCampaign	0%	0%	<0.1%
8	Kit (ConvertKit)	0%	0%	<0.1%
9	Privy	0%	0%	<0.1%
	Sites measured	60	886	11,322

Popular sites vs local business websites

Popular: sites of United Kingdom from the Tranco top million. Local business: websites of companies with 1–20 locations in the country, taken from a business places directory (platforms, marketplaces and aggregators excluded).

#	Technology	Popular sites	Local business	Difference, pp
	Any Email marketing	9.5%	3.3%	−6.2
1	Mailchimp	3.9%	1.9%	−2
2	Klaviyo	4.7%	0.8%	−3.8
3	MailerLite	0.2%	0.3%	+0.1
4	Omnisend	0.4%	0.2%	−0.2
5	Brevo (Sendinblue)	0.4%	0.2%	−0.2
6	ActiveCampaign	<0.1%	<0.1%	0
7	OptinMonster	0.3%	<0.1%	−0.2
8	Kit (ConvertKit)	<0.1%	<0.1%	0
9	Sumo	<0.1%	<0.1%	0
10	Privy	<0.1%	<0.1%	0
	Sites measured	11,322	20,305

Our crawler: 11,322 sites · United Kingdom · updated 13 Nov 2026 · Methodology