"We tried attribution. Our numbers looked completely wrong, so we went back to using platform reports."

If you've said this — or heard another founder say it — you've encountered the most expensive myth in ecommerce analytics: the idea that attribution data should match what your ad platforms tell you.

It won't. That's not a flaw. That's literally the point.

A multi-channel attribution tool works by replacing platform-reported numbers with an independent picture of your marketing. Of course the numbers look different — platforms overcount conversions by design. But because most founders go in with the wrong expectations, they end up rejecting accurate data and going back to inaccurate data that feels more comfortable.