Server-side GTM — first-party tracking, iOS-resilient
Move your tag manager from the visitor's browser to a server you control. Bypasses ad blockers, restores conversion signal lost to iOS Safari and ITP, and dramatically improves Meta CAPI + Google Ads Enhanced Conversions reliability.
Key points
What you should know about Server-side GTM Setup.
- Tags run on metrics.yourdomain.com (a subdomain you control) instead of www.googletagmanager.com — ad blockers can't nuke them
- Restores 15-30% of conversion data lost to iOS Safari's third-party cookie blocking and ITP
- Meta Pixel + Conversions API server-side — bigger event match quality, better lookalike audiences
- Google Ads Enhanced Conversions hashed-PII matching, properly implemented
- Container runs on GCP Cloud Run — free tier usually covers small sites; ~$10-30/mo for larger. Our $19/mo managed option covers the hosting + monitoring, or you host on your own GCP and we configure it.
When to add this
The honest take.
Add when paid traffic is meaningful (Google Ads + Meta together spending >$1k/mo) — that's the breakeven where the recovered conversion signal pays back the setup + hosting in weeks via better Smart Bidding optimization. Below that spend, the marginal benefit is real but slower to compound. Already included in Beacon Growth+ tier subscriptions; this addon makes it available to Starter and Core clients who want the resilience without upgrading tiers.
Pairs with
The Analytics & Attribution service
Server-side GTM Setup compounds the value of Analytics & Attribution when run together. See the full service for context.
Ready to add Server-side GTM Setup to your plan?
Book a strategy call or jump straight to the contact form. Beacon Growth or higher recommended for this add-on.