Customer.io on new websites

1. Customer.io appeared on about 130 new sites in the last 30 days.^[1]
2. Nine in ten new Customer.io sites also use Google Tag Manager.
3. It is unusually common on .ca domains: 3.8% of the domains running it, against 1.5% of domains across new sites.

The line is the 7-day average share of new sites that use Customer.io, since 10 September.

#	Movement	Tool	Share of all sites	Share of category	Bar
1	▼1	Brevo	0.8%	32.0%
2	▲8	Hostinger Reach	0.7%	29.3%
3	▼1	Klaviyo	0.3%	11.2%
4	–	HubSpot	0.2%	6.3%
5	–	Mailchimp	0.1%	4.9%
…
17	▲1	Customer.io	<0.1%	0.3%

All-time shares across the new sites we track: of all of them, and of the sites using any Email Marketing tool. The most common alternatives to Customer.io on new websites are Brevo and Mailchimp. All 286 in Email Marketing

Tool	Sites with both	vs all new sites	Bar
Bynder	255	11155x
Contentful	260	6948x
Podscribe	259	5706x
Tapad	257	5030x
Notion	261	4974x

Tools that turn up far more often on Customer.io sites than on new sites in general, and how many times as common each one is there.

135 of the 489 sites using Customer.io are product launches we list individually. The other 354 are new business and personal sites: they count towards the figures above but are not listed here. A watch sends them to you.

• MyLens mylens.ai
• Kanbanchi app.kanbanchi.com
• Griffin by Tavus tavus.io

Site	Found	Also detected
MyLens mylens.ai	Oct 18
NimbleBrain | The open engine for AI that makes work more efficient trynimblebrain.com · United States	Oct 15
Kanbanchi app.kanbanchi.com · Productivity · United Kingdom	Oct 10
Say what you need. We turn it into a course — COPYMIND bible-learning.app · Education	Oct 9
Say what you need. We turn it into a course — COPYMIND professional-english.app · Education	Oct 9
Decisão de crédito até 30 segundos | Robbin robbin.io · Finance	Oct 8
Maltexi | Traceability, EDI & File Exchange Software maltexi.com	Oct 8
Griffin by Tavus tavus.io · AI · United States	Oct 8
Say what you need. We turn it into a course — COPYMIND aiupskill.app · Education	Oct 7
dinerr dinerr.com	Oct 3
Recruit My Game recruitmygame.com · Education · United States	Sep 30
GitHub 全球加速站 · 开发者专属的 GitHub 加速网关 ghclone.com · Developer Tools	Sep 30

Showing the most recent 12 of 135.

Watches, exports and the API give you all 489 sites using Customer.io, from £15 a month.

1. These figures cover websites that went live since April 2026, not the web as a whole.
2. Country comes from what each site says about itself, such as a company registration, legal terms or a phone number, not just its domain ending. We count a country only where it is stated plainly enough to be sure: a governing-law clause or company registration number on a legal page, a phone country code, or a country domain ending. Sites that publish none are not counted at all.
3. Green hosting is the share whose web host The Green Web Foundation lists as running on green energy, among sites checked since 1 April 2026, against the same share for every new site we checked over that time. Data from The Green Web Foundation.