How do I know if a competitor's site is using Google Analytics?

Question

Search Engine Optimization

I used to check on RR-CY whether a competitor uses metrics and GA, who knows which service can be checked now? I heard that there are plugins for browsers, maybe someone knows?

Answer 1

can't you open the page and find
and
UA- ?
then put https://www.ghostery.com/ , it will show what cut off

Answer 2

I don’t know about specialized services, but perhaps installing ad blockers in the browser can help, they cut off many services like GA and show exactly what they cut off.

Answer 3

And now there are those who do NOT use GA and NM? wow