Customer.io is an automated messaging platform for marketers.

Detection looks at vendor endpoints across 2 fingerprint rules among the site's public responses.

01

Websites using Customer.io

Loading website list…

02

Signal classes

PluginView evaluates public page signals in these classes when identifying Customer.io. Individual fingerprint rule bodies are proprietary and are not published.

  • Vendor endpoints
03

Example public indicators for Customer.io

Illustrative indicators derived from public catalog metadata for Customer.io. A live scan may match additional proprietary rules beyond these examples.

  • assets.customer.io
  • track.customer.io
04

What a detection means

Establishes
The listed vendor-controlled browser component was present and active on the scanned page at scan time.
Does not establish
It does not prove a sitewide installation, current commercial contract, backend-only use, exclusive use, or production transaction volume.
05

Minimum proof rule

Observe a live browser request, loaded script, or iframe to the listed unique vendor endpoint. Source-text-only matches do not qualify.

Best pages to check: All pages; trigger event

06

How to check a site for Customer.io

  1. 1. Enter the website URL in the scan form — homepage, pricing, checkout, or login pages usually expose the strongest Customer.io signals (prefer: All pages; trigger event).
  2. 2. PluginView reads only public responses (vendor endpoints) and scores them against the Customer.io signature set (2 rules).
  3. 3. Review the confidence score and text explanation for Customer.io on the results page.
07

FAQ: detecting Customer.io

Can PluginView detect Customer.io without logging in?
Yes. PluginView only reads publicly accessible responses when checking for Customer.io — typically vendor endpoints. It does not bypass authentication or paywalls.
What category is Customer.io?
Customer.io is classified under Marketing automation, Marketing, CDP, Email & Push in the PluginView directory.
How many fingerprint rules cover Customer.io?
This reference currently tracks 2 fingerprint rules across vendor endpoints. Individual rule bodies are proprietary and are not published.
What public signals suggest a site uses Customer.io?
Illustrative public indicators for Customer.io include assets.customer.io; track.customer.io. A live scan may match additional proprietary rules beyond these examples.
Which pages are best for detecting Customer.io?
For Customer.io, start with: All pages; trigger event.

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