Live tag monitoring · GDPR-compliant · Made in Germany

When a tag stops firing, you hear it first.

Tracking failures are silent. No error message, no broken page — your numbers just quietly turn wrong. GTM Monitor checks your setup automatically, pinpoints the cause and tells you before you allocate budget based on broken data.

Free instant check of your website

Enter your domain and see the state of your tracking in under two minutes. No login, no installation, no appointment. You get the health score and the first findings right away — for the full report including the AI analysis, just leave your email address.

  1. 1Enter your domain
  2. 2The audit runs automatically
  3. 3Read the findings

Configure your audit

GTM & Consent Mode Audit — Full (GTM API + Website) or Prospect (website only)

Log in with Google

The most expensive tracking problem is the one nobody knows about

A broken tag causes no outage anyone reports. It simply disappears from the data — and everyone keeps working with numbers that no longer hold. Usually it surfaces weeks later, when a report looks odd.

Weeks

until anyone notices

A consent update, a theme deploy, one renamed button class — and a tag stops firing. Without monitoring nobody notices until someone happens to look at the report.

Blind

campaign optimisation

When conversions go missing, Google Ads bids on the wrong signals. You keep paying for clicks while the algorithm learns your campaign in the wrong direction.

§ GDPR

exposure from broken consent

A pixel firing before consent is a real compliance problem — and it is visible from the outside. Without regular checks, you may hear about it from the wrong party.

What GTM Monitor takes off your plate

It does exactly the work you would otherwise book a developer or tracking specialist for — automatically, daily, with no waiting.

AI cross-checks every finding

The code measures, the AI interprets. Every automatically detected finding is validated against the raw data, false positives are filtered out, and what remains is explained in plain language — cause included, plus the concrete fix in GTM.

Saves expensive developer hours

No ticket, no coordination round, no waiting for a free slot. The investigation that easily eats half a day runs automatically here — and points straight at what broke.

Finds what preview mode misses

GTM preview shows you your own browser, with your consent long since stored. The monitor checks as a genuine first-time visitor every single time, catching failures that stay structurally invisible in preview mode.

Tells you on its own

You never have to remember to look. As soon as a new critical finding appears, you get a message — instead of spotting it in the monthly report.

Checks Consent Mode v2 end to end

Signal order, defaults, behaviour before and after consent, and whether every channel is properly gated. Exactly the points an audit looks at first.

Evidence, not guesswork

Every finding rests on real network requests, real parameters and real HTTP status codes. Not on assumptions from the container — on what the browser actually sent.

What you actually save

The honest comparison: what happens today when a tag fails — and what happens with monitoring?

SituationWithout monitoringWith GTM Monitor
Detecting the failureBy chance, when a report looks off — often weeks laterAutomatically on the next scan, next day at the latest
Finding the causeA developer debugs through GTM, consent and the network tabCause and fix are already in the report
Effort per incidentSeveral hours quickly — plus coordination and waitingRead the report, apply the fix
Data lossThe entire period until discovery is goneLimited to the window until the next scan
First-visit failuresInvisible in your own browser, because consent is storedReliably detected and named

A single missed tracking failure usually costs more than a year of monitoring — through lost data, blindly optimised campaigns and the hours spent hunting for the cause.

How it works

Up and running in minutes — no developer involved.

  1. 01

    Add your domain and container

    You enter your domain and your GTM container. If you use server-side tagging, add the server container too. That is all — nothing gets installed on your website and no code is added.

  2. 02

    Choose your scan rhythm

    Daily, or more frequently for sites that deploy often. The monitor visits your site like a genuine first-time visitor, accepts the consent banner and records what actually goes out.

  3. 03

    Get findings and fix them

    After each scan you get the current state: health score, new findings, cause and fix. When a new critical finding appears, the monitor reaches out to you.

What every scan checks

The monitor does not just verify that the container loads — it verifies that the right data actually arrives.

Google Tag Manager

  • Container loads and is the published live version
  • Tags without triggers, duplicate tags, conflicting exceptions
  • Triggers pointing at variables that do not exist
  • Paused tags correctly recognised as inactive
  • Unpublished differences between draft and live

GA4 & channels

  • Does the pageview hit actually go out — or is it just a tag in the container?
  • First-visit pageview: does GA4 fire on the very first load?
  • Does the endpoint respond with success or with 4xx/5xx?
  • Which marketing channels are active — client-side or server-side?
  • Do tags fire on subsequent pages, not only on the homepage?

Consent Mode v2 & privacy

  • Is consent_default set, and set before the GTM snippet?
  • Which CMP is in use and when does it initialise?
  • Do pixels fire before consent is given?
  • Are the gcs/gcd parameters consistent with the decision?
  • Does the consent decision persist across pages?

Server-side tagging

  • Does your server container receive any browser data at all?
  • Is the sGTM endpoint reachable and healthy?
  • Is the server URL present in the published live version?
  • Genuine first-party SST — cleanly separated from Google-owned endpoints

Pricing

Transparent packages, monthly or on a term. You decide how many domains are monitored and how often they are scanned.

Launch offer

At launch every package is €10 below the regular price — permanently, for the entire contract term. The offer is time-limited and ends once the first places are taken.

Every start begins with a conversation

GTM Monitor is deliberately not a one-click purchase right now. You get in touch via the form, we briefly go through your setup — number of domains, server-side or not, the scan rhythm you want — and then you receive your contract directly from us, billed by SEPA direct debit. The first 14 days are free and non-binding.

Flex

Monthly

39€ / month

49Launch offer

no commitment · cancel monthly


  • 1 domain + 1 GTM web container
  • Website & container scan
  • Code check + AI review
  • Daily scan
  • Email alerts
  • Your own dashboard access
  • Custom scan interval
  • Server GTM scan
Start 14-day free trial

Plan 01

Starter

29€ / month

39Launch offer

12-month term · €348 per year


  • 1 domain + 1 GTM web container
  • Website & container scanverifies your tags really fire
  • Code check + AI reviewcatches silent failures and anomalies
  • Daily scan
  • Email alerts
  • Your own dashboard access
  • Custom scan interval
  • Server GTM scan
Start 14-day free trial
Coming soon

Plan 03

Pro + Server

139€ / month

149Launch offer

12-month term · for server-side setups


  • Everything in Professional
  • Server GTM container scanmonitors your sGTM endpoint
  • Server-side request monitoring
  • Endpoint availability check
  • Extended domain quotas
Join the waitlist

Start your 14-day free trial

Tell us briefly what you want to monitor — we usually reply within one business day with an assessment of your setup and the next steps.

  • Non-binding: no cost during the first 14 days.
  • No payment details required to start.
  • You receive your contract personally from us — billed by SEPA direct debit.
  • The reply comes from us directly, not from a ticket system.

Prefer email? turan@track-in.de

Your details are used solely to answer your enquiry. No sharing with third parties, no newsletter. Details in the privacy policy.

Frequently asked questions

What prospects ask us most often before starting.

Do I have to install anything on my website?

No. GTM Monitor visits your site from the outside, the way a real visitor does, and records which requests actually go out. No script is embedded, no plugin installed, nothing in your code changes.

Do I need a developer for this?

No. Setup means: enter your domain, enter your GTM container, pick a scan rhythm. That takes a few minutes and the dashboard guides you. A developer is only needed once a finding gets fixed — and even then the cause is already in the report rather than something to hunt for.

How is this different from GTM preview mode?

Preview mode shows you your own browser, where consent has long been stored — so you always see the "returning visitor" case. That is precisely why failures that only occur on the very first page load stay structurally invisible there. The monitor checks with a fresh profile every time and catches them. On top of that, preview only runs when you start it; the monitor runs on its own.

Does it work with server-side tagging?

Yes. The monitor detects a first-party sGTM endpoint and cleanly separates it from Google-owned endpoints — a distinction that matters for GDPR assessment. It checks whether the server container receives any browser data at all, whether the endpoint is reachable, and whether the server URL is present in the published live version. Deeper server monitoring arrives with Plan 03.

How reliable is the AI analysis?

The AI does not invent findings. It receives the actually measured raw data — network requests, parameters, HTTP status codes, dataLayer pushes, console errors — and validates the automatically detected findings against it. Whatever it identifies as a false positive is removed from the report and the score is recalculated. Personal values such as user IDs or click IDs are stripped beforehand and never reach the AI.

Is it GDPR-compliant?

Monitoring runs on a server in Germany and the data stays in the EU. What is monitored is your own website — no personal data about your visitors is collected, because the monitor itself is the visitor. A data processing agreement is available on request.

Why can I not just buy online?

Because we want to look at each setup first. Which package fits depends on how many domains are monitored, whether you tag server-side and how often you want to scan. A short conversation prevents you from paying for something that does not match your setup. Contract and SEPA direct debit billing follow directly from us.

What happens after the 14 days?

Nothing automatic. No payment details are stored, nothing is charged and nothing renews by itself. If you want to continue, we sign the contract afterwards — if not, the trial simply ends.