You would be surprised how many companies do in fact use multiple analytics services.
Only one tool will be a 'source of truth' but a company using a combination of something like GA4 (Business source of truth), Mixpanel (product insights), and Clarity (Landing page analysis) is not unheard of.
The types of companies that use multiple services are also the types of companies that are likely spending $1,000s per month as well, so overall quite a profitable industry for many companies to operate in.
Only one tool will be a 'source of truth' but a company using a combination of something like GA4 (Business source of truth), Mixpanel (product insights), and Clarity (Landing page analysis) is not unheard of.
The types of companies that use multiple services are also the types of companies that are likely spending $1,000s per month as well, so overall quite a profitable industry for many companies to operate in.