Most attribution tools rely on cookies that Safari deletes after 7 days. North Star Metric uses server-side fingerprinting to identify returning visitors without cookies. Every match is verified server-side. No statistical modeling, no guesswork. When we say a Meta ad drove a purchase, we prove it. Install the tracking pixel in one click. See orders, attribution, customer segments, and cohort retention in a real-time dashboard. Works with Meta, Google, and TikTok Ads.