Tracking always breaks.
Now you always know.
TagWatch is tag monitoring for webshops and agencies. Set it up once, and a real browser opens your site every night to check that every pixel still fires.
You never hear from it until something breaks.
The GTM container stopped loading on /checkout. Fix it now, before your campaigns run blind.
Broken tracking isn't just annoying. It's expensive.
Every hour your tracking is broken, your ad campaigns are optimising on incomplete data. Your best-performing audiences go unrecognised. Your ROAS becomes a guess.
Your campaigns kept running. The budget kept spending. The algorithms kept "learning" on data that wasn't there. And the worst part: you made decisions based on those numbers.
Ad spend going blind
Every euro spent while tracking is broken is a euro your ad platform can't attribute. It keeps spending and keeps learning the wrong lessons.
ROAS you can't trust
When did it break? How long was the data wrong? Which decisions did you make on bad numbers? Broken tracking doesn't just lose data, it poisons the data you kept.
Reports with holes in them
Your conversion data looks a bit low this week. Is it a real trend or a tracking gap? You spend hours investigating instead of optimising.
Think of it like a smoke alarm.
You don't check your smoke alarm every morning. You install it, test it once, and forget it exists until the one moment it matters.
TagWatch is the smoke alarm for your tracking stack. Set it up once and stop thinking about tracking. We'll be there when you need us.
See which tags are on your site right now.
Type your domain and watch. TagWatch opens your site in a real browser, accepts the cookie banner, and names every tag that fires. No account needed.
Every scan is also an audit.
The scan checks every tag against your cookie banner and lists what is wrong, with the fix next to it.
The Meta Pixel beacon fired before the cookie banner was answered. Visitors who decline are tracked anyway, so configure this tag to wait for consent.
Possible data loss. Visitors who land from an ad and accept a few pages later are measured without their click ID. Use a banner nobody can walk past.
2 Google Analytics 4 IDs are firing on this page. Keep them all if that is on purpose, otherwise uncheck the ones you do not own.
Every note names the tag and the fix. You start monitoring with a clean setup instead of a guess.
Knows the whole page
Every tracker on the page, recognised automatically.
Covers all four layers of your tracking.
The page can look fine while the events are gone, and the events can look fine while conversions count wrong. TagWatch checks every layer, every night.
Pixel monitoring
A real browser opens your pages and checks that GTM, GA4, Meta and your other tags still load. One monitor per channel, so you see exactly which one broke.
Layer 1 · On your pages
Event volume monitoring
TagWatch learns what a normal day looks like for your events. The moment purchases drop below the baseline, you hear about it.
Layer 2 · In your event stream
Conversion tracking monitors
Connects straight to GA4, Google Ads and Meta and watches the numbers you steer on. Even when every tag loads fine, a conversion drop still raises an alert.
Layer 3 · In GA4, Google Ads and Meta
Google Tag Manager template audits
Tag templates from the Community Gallery get updates, and a missed critical update breaks tracking. TagWatch audits your containers daily and tells you which template updates are critical.
Layer 4 · In your GTM container
You know the moment it breaks.
Instant alerts when something breaks, and a weekly digest every Monday.
Set up in 5 minutes. Then forget about it.
No tag IDs, no snippets, no developer. Type your domain and approve what the scan finds.
Type your domain
That is all the setup asks of you. No tag IDs to copy, no snippets to paste, no documentation to read.
Watch the scan
TagWatch opens your site in a real browser while you watch. It accepts the cookie banner and finds every tag that fires. About 90 seconds.
Approve your monitors
The scan turns every tag it finds into a monitor, ready to create. You approve them in one click and configure nothing. For conversion monitors, you sign in with Google and pick the numbers.
Walk away
TagWatch runs silently from that moment. You only hear from it when something breaks.
Want event volumes too? Add the TagWatch tag in Google Tag Manager. No code, no developer, and data flows within two minutes.
Built to stay out of your way.
Good monitoring is not worrying about your tracking. Not because nothing breaks, but because you will know when it does.
Silent until it matters
TagWatch runs in the background 24/7. No dashboard to check, no reports to review. Just silence until something breaks and you need to know.
Instant alert when it counts
The moment a tag stops firing, you get a message. Email, Slack, or webhook. Fix it in minutes, not after three days of blind ad spend.
Real browser verification
Not a ping. TagWatch loads your actual pages in a real browser and checks that your GTM container and GA4 tag are firing correctly.
Volume anomaly detection
Detects when event volumes drop below your baseline, even when the tag technically loads but stops sending data.
Conversion tracking monitoring
Connects to GA4 and Google Ads and checks the conversions you report on against their baseline. A quiet dip gets flagged before it skews a week of reporting.
Automatic all-clear
When your tags come back online, TagWatch closes the incident automatically. No noise, no false alarms, no manual housekeeping.
Every site in one place
One dashboard for all your domains and clients. All quiet until it isn't, exactly the way it should be.
Weekly performance digest
Every Monday, a clear summary of your event volumes, week-over-week trends, and a projected next week, so you always know the shape of your data.
Everything in one place. Nothing in your face.
Every monitor, every run, one page. Most weeks you never open it, and that is the point.
Less than one day of wasted ad spend.
TagWatch pays for itself the first time it catches a broken tag.
Billed annually as €252 · save 16%
1 domain. Every feature included. Up and running in 5 minutes.
Need more domains? Scale up.
All features included.
Start free trialAll features included.
All plans include a 14-day free trial. No credit card required.
Tag monitoring for agencies. Every client from one place.
Agency status is not a separate plan. You sign up like any client and request agency access. From there you can connect client workspaces and switch between them instantly.
Create and manage client workspaces from one account. Sign up on any plan and request agency status to get started.
Client switcher
Jump into any client workspace as yourself. No separate logins.
Billing flexibility
Cover the subscription yourself, or let the client pay TagWatch directly.
No extra cost
Agency features sit on top of your own plan at no additional charge.
Volume discount
The more agency-billed clients you connect, the lower your per-client rate.
| Active clients | Starter | Pro | Business |
|---|---|---|---|
| 1 to 9 | €25 | €65 | €175 |
| 10 to 24 | €22 | €56 | €165 |
| 25 to 49 | €19 | €50 | €155 |
| 50+ | €17 | €45 | €150 |
Discount unlocks automatically as you grow. No codes, no applications.
Or pass the savings on and win on price. Your call.
Build it with us. Free until launch.
Before the public launch, 5 agencies join as founding agencies. You put client sites on TagWatch, we talk three times, and your feedback steers what gets built.
- Free for all your client sites until the public launch.
- The founding rate stays yours after launch.
- A direct line to the people who build TagWatch.
5 spots. When they are gone, the program closes.
Private by design. GDPR compliant out of the box.
TagWatch only collects what it needs to do its job. No visitor data. No personal information. Ever.
No PII collected
TagWatch never sees usernames, emails, IP addresses or any personal data. Only anonymous event counts reach our servers.
Aggregate counts only
The GTM template sends event names and counts. Nothing else. Your visitors are completely invisible to us.
GDPR compliant
No consent banner needed for TagWatch. Because we collect no personal data, the GDPR lawful basis question simply does not apply.
No cookies, no fingerprinting
The GTM template does not set cookies or fingerprint browsers. It is as lightweight and privacy-safe as a tag can be.
Questions before you start
What most people ask before the trial. The rest is in the guides.
What is tag monitoring?
Tag monitoring checks that the tracking tags on your site still fire and still send data. TagWatch does it in four layers. A real browser opens your pages. Event volumes run against a four week same weekday baseline. GA4, Google Ads and Meta conversions are compared with their own baseline. Your GTM containers are audited for critical template updates.
Which tags does TagWatch detect?
TagWatch recognises over a hundred trackers and watches every one whose account travels in a request, from Google Tag Manager, GA4 and Meta to Hotjar, Clarity and Klaviyo. It also reads server-side GTM behind Stape and Taggrs loaders.
Does it work with server-side tagging, Stape or Taggrs?
Yes. The scan finds server-side GA4 and GTM endpoints and decodes the encoded loaders of Stape and Taggrs. A correctly tagged site is never reported as untagged because its loader hides the tag ID.
How do I get an alert?
By email, Slack or webhook. A missing tag must fail twice in a row before an incident opens, so an alert means something. When the tag returns, TagWatch closes the incident on its own.
Do I need a developer?
No. You type your domain, watch a 90 second scan, and approve the monitors it proposes. Event volume monitoring needs one tag in Google Tag Manager, installed from a template in two minutes.
What does it cost?
Starter is €25 a month for one domain, Pro €65 for three, Business €175 for up to ten. Every plan has every feature and a 14-day free trial without a credit card. Agencies pay per client, from €17.
Set it up once. We take it from there.
Your sites are watched continuously, on every tag you have today.
And TagWatch keeps up: new trackers are added to the catalogue every week, so the tags you add later are covered too.
5-minute setup. 14-day free trial. No credit card.