Websites Powered by Customer.io

3,252 websites tracked using Customer.io (Marketing automation) · customer.io

Customer.io is a marketing automation platform for campaigns and lead nurturing. Its official site is customer.io. PoweredBy tracks the websites that use Customer.io across the public web; the tracked counts, adoption trend, and site list on this page are updated from our ongoing crawl of the marketing automation ecosystem.

Usage trend

Core Web Vitals

Median site among 1,464 Customer.io sites with Chrome UX data, p75 values, Aug 2026.

Top countries

United States 883

India 574

United Kingdom 487

Canada 478

Germany 422

Australia 394

France 370

Philippines 338

Sites using Customer.io by audience country, Chrome UX Report.

Top sites by authority

The share of the web's most authoritative domains, by Open Page Rank tier, seen running Customer.io in recent crawls. Only 372 domains worldwide score 9 or higher.

Websites using Customer.io

Open Page Rank is the domain's authority score (0 to 10, from the open web link graph); the list is ordered by it and covers sites seen in recent crawls. Visits and keywords are estimated US organic search figures.

Download top 10,000 as CSV (zip) →

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