Analytics counts visits. Your forms count submissions. The CRM counts leads. The ad platforms count conversions. Each counts a different moment on a different clock, so the totals differ, and until someone traces one against the others nobody can say which differences are breakage.
Usually a two-week audit. I connect to your analytics, Search Console, ad accounts, forms and CRM, reconcile the last ninety days where the records allow it, and hand you a written reconciliation: the differences the data explains, the ones still unknown, and the fixes in order. Where the history can't be matched, because the IDs were never captured, I say so and start a clean baseline from that day. You keep that whether or not we go further.
The audit is a fixed price. Ongoing reconciliation and monitoring is a monthly fee.
You do, and it's probably fine. The problem usually isn't the tool. It's that nobody checks it against the forms and the CRM, so when the numbers disagree nobody knows which one to believe, and then nobody uses any of them.
The long version of how I measure, with a worked example, is here: How I measure, in detail
I run first-party analytics, with consent handled properly, on the sites I operate myself.
Platform
I'm building Site Brain and testing it on my own sites first: the channel sites, Fronts and growthlabs.work. The first customers will be design partners. I'll publish before-and-after numbers as they come in, and not before.
Platform
Shared analytics recorded on my own infrastructure, with consent handled properly, used by the sites I run.
A few lines is enough. I reply within a business day, myself.
Email meThis panel shows you what this site can see about your visit, as it happens. It measures the same kinds of things this site's analytics does.