Most tracking monitoring works by putting a script on the site it watches. That buys depth: once you are inside the page, you can see every event, every property, and every value it sends.

The cost is that it only watches sites where the script actually landed. For an agency, that means a conversation, a developer ticket, and a client's approval for every account you want covered. In practice the rollout stops after the first few clients who said yes.

We scan from the outside, the way a visitor does. That gives up depth and gains something an agency needs more: it works on every client, today, without asking any of them for anything.

These are not mutually exclusive, and for most agencies the sensible answer is both. Keep deep, installed monitoring on the flagship accounts that justified the rollout. Use us for the long tail you will never get a script onto.

That tail is usually most of the roster, and it is the part where a break goes unnoticed longest, because nobody is looking at those dashboards every week.

Scanning from outside means real limits, and they are worth knowing before you buy rather than after.

We detect a tag that has gone missing, and a tag that is present but transmitting nothing. We do not see conversion values, deduplication, consent configuration, or anything that only fails behind a checkout or a login. Server-side tracking is invisible to us, and where we can tell a site is using it we stay quiet rather than report a failure we cannot confirm.

The full boundary is on the Scope & Limitations page. If the failures you are worried about are in that list, installed monitoring is the right tool and we will say so.