If your Meta Ads Manager CAPI match rate is sitting at 68 percent and your last attribution platform does not even report it, the gap you are staring at is real money. That gap is the conversions Meta could not match back to ads because the iOS 14.5 App Tracking Transparency prompt, Safari Intelligent Tracking Prevention, and Chrome's third-party cookie deprecation have shredded the browser-only tracking model. In 2026, server-side tracking is no longer a nice-to-have for direct-to-consumer brands. It is the baseline. The problem is that "server-side tracking" now means at least three different things depending on who is selling it. Some vendors sell you a hosted Google Tag Manager Server container and call it a day. Others sell you a tracker that improves Conversions API match rate but leaves you to figure out analytics yourself. A third group bundles the pixel, the analytics layer, attribution, and ad operations into one platform. The right pick depends on what you actually need.…