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	7%	0.9%	4.2%	2.8%	2.9%	0.7%	1.5%
2	Mailchimp	4.4%	1%	3.1%	2%	1.6%	0.2%	1.2%
3	Omnisend	0.7%	0.2%	0.2%	0.4%	0.4%	0.2%	0.4%
4	Brevo (Sendinblue)	0.4%	0.2%	0.5%	1.7%	1.1%	0%	0.3%
5	OptinMonster	0.3%	0.3%	0.5%	0.2%	0.1%	<0.1%	<0.1%
6	MailerLite	0.2%	0.1%	0.2%	<0.1%	0.2%	<0.1%	<0.1%
7	ActiveCampaign	<0.1%	<0.1%	0.4%	0.2%	0.2%	0%	0.3%
8	Kit (ConvertKit)	<0.1%	<0.1%	<0.1%	0%	0%	0%	0%
9	Privy	<0.1%	<0.1%	0%	0%	0%	0%	<0.1%
10	Sumo	<0.1%	<0.1%	0%	<0.1%	0%	0%	0%
11	GetResponse	<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	Mailchimp	1.5%	2.5%	4.4%
2	Klaviyo	0%	1.3%	7%
3	Omnisend	0%	0%	0.7%
4	Brevo (Sendinblue)	0%	0.1%	0.4%
5	OptinMonster	0%	0.1%	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	66	931	11,909

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	12%	3.9%	−8.5
1	Mailchimp	4.4%	2%	−2.3
2	Klaviyo	7%	1.3%	−5.7
3	MailerLite	0.2%	0.3%	0
4	Omnisend	0.7%	0.2%	−0.5
5	Brevo (Sendinblue)	0.4%	0.1%	−0.3
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	11,909	21,114

Our crawler: 11,909 sites · United Kingdom · updated 23 Oct 2026 · Methodology