Detect Signal
Signal is a cross-platform encrypted messaging service.
Detection looks at script sources, javascript globals across 3 fingerprint rules among the site's public responses.
01
Websites using Signal
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02
Signal classes
PluginView evaluates public page signals in these classes when identifying Signal. Individual fingerprint rule bodies are proprietary and are not published.
- Script sources
- JavaScript globals
03
Example public indicators for Signal
Illustrative indicators derived from public catalog metadata for Signal. A live scan may match additional proprietary rules beyond these examples.
- s.btstatic.com/tag.js
- s.thebrighttag.com/iframe?
- signalData
04
What a detection means
- Establishes
- One or more public signals on the scanned page matched a known Signal signature (3 rules) at the time of the scan.
- Does not establish
- A sitewide install of Signal, an active vendor contract, exclusive use, or that Signal is still in place today.
05
How to check a site for Signal
- 1. Enter the website URL in the scan form — homepage, pricing, checkout, or login pages usually expose the strongest Signal signals.
- 2. PluginView reads only public responses (script sources, javascript globals) and scores them against the Signal signature set (3 rules).
- 3. Review the confidence score and text explanation for Signal on the results page.
06
FAQ: detecting Signal
- Can PluginView detect Signal without logging in?
- Yes. PluginView only reads publicly accessible responses when checking for Signal — typically script sources, javascript globals. It does not bypass authentication or paywalls.
- What category is Signal?
- Signal is classified under Marketing automation, Tag managers in the PluginView directory.
- How many fingerprint rules cover Signal?
- This reference currently tracks 3 fingerprint rules across script sources, javascript globals. Individual rule bodies are proprietary and are not published.
- What public signals suggest a site uses Signal?
- Illustrative public indicators for Signal include s.btstatic.com/tag.js; s.thebrighttag.com/iframe?; signalData. A live scan may match additional proprietary rules beyond these examples.
