If you do something like Plausible.io with daily changing salts, you know only about daily visitors. This might be GDPR compliant.
If you do something like Fathom with chaining requests, you can see daily uniques, bounce rates and click speed. Not sure this is GDPR compliant though. Would feel better if they run this through an European GDPR watchdog which AFAIK they haven't.
If you do something like SimpleAnalytics with using the referrer to find uniques, you can see daily unique visits but with some statistical errors. Should be GDPR an ePrivacy compliant without your customers needing to declare your usage or have a data processing agreement with you. But gets you the least analytical data (We use SimpleAnalytics).
None of these can do cohorts, the holy grail of VC analytics.
For cohorts I would think you could make something GDPR compliant with Bloom (Cuckoo) filters.
If you do something like Plausible.io with daily changing salts, you know only about daily visitors. This might be GDPR compliant.
If you do something like Fathom with chaining requests, you can see daily uniques, bounce rates and click speed. Not sure this is GDPR compliant though. Would feel better if they run this through an European GDPR watchdog which AFAIK they haven't.
If you do something like SimpleAnalytics with using the referrer to find uniques, you can see daily unique visits but with some statistical errors. Should be GDPR an ePrivacy compliant without your customers needing to declare your usage or have a data processing agreement with you. But gets you the least analytical data (We use SimpleAnalytics).
None of these can do cohorts, the holy grail of VC analytics.
For cohorts I would think you could make something GDPR compliant with Bloom (Cuckoo) filters.