Is it complicated to migrate to Server-Side?

It requires technical expertise (DNS, web and server GTM configuration, platform APIs, consent). This is the core business of specialists like A-Track. A poor configuration can cause data loss or duplicates, or even non-compliant sends: hence the importance of a testing phase before going live.

Does GTM Server speed up the site?

Not automatically. Server-side only makes the page lighter if scripts are removed from the browser, for example advertising pixels replaced by server-side sends. If every pixel stays in place, the gain is small. When scripts are removed, loading improves, which benefits user experience and, indirectly, SEO through Core Web Vitals.

Does Server-Side allow tracking everything, even without consent?

No. Technically a server can receive data, but that does not change the rules: the visitor's choice in the cookie banner must be respected, in the browser and on the server alike. A refusal is still a refusal. Server-side is there to make data more reliable and more minimal, not to collect what the visitor refused.

Does Server-Side tracking help with Email Marketing (Klaviyo/Mailchimp)?

Yes, to some extent. An identification cookie set by your server on your own domain holds up better against the 7-day limit that Safari (ITP) applies to cookies set in JavaScript. Klaviyo or Mailchimp can therefore recognise returning subscribers for longer, and "Abandoned cart" or "Browse abandonment" flows trigger more often. This tracking still requires the visitor's consent.

Is Server-Side tracking reserved for large companies?

No. With hosting providers such as Stape, the infrastructure has become accessible to SMEs. It is especially useful as soon as you invest regularly in advertising or sell online: reliable conversion data then matters directly for your campaigns. An initial audit shows whether the investment is justified for your site.

Does Server-Side tracking improve SEO?

Indirectly, yes. By moving part of the advertising scripts (Meta Pixel, TikTok Pixel, etc.) from the browser to the server, you lighten the page's code. The site can load faster, and loading speed is part of Google's page experience signals (Core Web Vitals).

Can I use GTM Server-Side for tools other than Google?

Yes. You can send data to Facebook, TikTok, Pinterest, LinkedIn, Klaviyo, or even your own SQL/BigQuery database from the same server.

What is GTM (Google Tag Manager) Server-Side?

It is the server version of GTM. It allows for receiving web data, manipulating it (cleaning PII, hashing emails), and distributing it to partner APIs (Meta, Google Ads, TikTok).

What is "Server-Side" tracking?

It is a method where the browser sends data to your intermediary server (proxy), which cleans it and then forwards it to the platforms. You maintain full control of the data before it goes to the GAFAM.

What is the monthly cost of a Server-Side infrastructure?

It depends on request volume. At Stape, a free plan covers up to 10,000 requests per month, and the Pro plan costs about USD 17 per month billed annually, for up to 500,000 requests (Stape's published pricing, September 2026). On Google Cloud (Cloud Run), Google estimates about USD 45 per month per server and recommends at least two servers in production. These hosting costs are not included in A-Track's setup and maintenance services: they come on top.

What are the major advantages of Server-Side?

First-party measurement on your own subdomain, more resilient to browser restrictions and ad blockers, always respecting the visitor's choice. Cookies set by the server, which can last longer than JavaScript cookies capped at 7 days by Safari (if the server is properly aligned with your domain). Data control: filtering, hashing or removing sensitive information before it is sent to the platforms. A potentially lighter page, if pixels are removed from the browser.

Thomas

I help Swiss and European companies and organizations collect reliable data on their websites to improve the performance of their digital marketing while complying with data protection laws.

Il est l'auteur des 41 articles below:

By Thomas · on 26.11.2025

Facebook CAPI (Conversions API): A Practical Guide for Swiss E-commerce

Your client's Meta dashboard shows fewer sales than their Shopify or WooCommerce back office? It is not a passing glitch. Stricter browsers,...

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By Thomas · on 26.11.2025

Google Consent Mode v2: Why Your Remarketing Audiences Are Empty (and How to Fix It)

Your remarketing lists have stopped growing and conversions are vanishing from reports? Check the plumbing first: without a properly connect...

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By Thomas · on 26.11.2025

Server-Side vs Client-Side Tracking: Why Browser-Only Tracking Hurts Your Clients' ROAS

Your client's back office no longer matches Google Ads or Meta, and they want to know which number to trust. The cause is often the measurem...

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By Thomas · on 26.11.2025

FADP vs GDPR: The Technical and Strategic Guide for Web Agencies in Switzerland

Your client asks whether their website is "compliant". They target Switzerland, but part of their traffic comes from France or Germany, and...

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By Thomas · on 31.10.2025

Server-Side Tracking: +40% More Data for Clinik.ch (Client Case)

Conversions vanishing from reports, a CPA climbing for no obvious reason, social channels that seem to deliver nothing: that was daily life...

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