End-to-end analytics setup: GA4, GTM, server-side, Meta CAPI

End-to-end analytics is a tracking setup where every lead or sale has a source, and GA4, ad platforms and your CRM count the same thing without duplicates. It is for online stores and service businesses that invest in ads and want to know which channel actually makes money. Pricing starts from €500, with a timeline from 14 days.

Who needs end-to-end analytics

• The numbers do not match: Analytics shows one number of purchases, Google Ads another, Meta a third and your CRM a fourth.
• Some orders have no source, so the budget is split on gut feeling.
• Ad algorithms learn from junk data: duplicate conversions, test orders, wrong values.
• The site has changed many times, and nobody remembers which tags, apps and pixels are installed and why.
• Sales close outside the website — in a CRM or on the phone — and your ads never find out.

If the main pain is “we do not know where customers come from”, start with our page on an unknown lead source.

What the setup includes

• Audit of current tracking: which tags, pixels and apps are installed, what duplicates, what does not fire.
• GA4 and Google Tag Manager: a clean event structure, e-commerce from product view to purchase, enquiries and calls for service businesses.
• Server-side tagging (for example via Stape), Meta Conversions API and Google Ads Enhanced Conversions, so less data is lost to blockers and browser restrictions.
• Platforms: Shopify custom pixels, WooCommerce, CRM events when the deal closes outside the site.
• Cookie consent: Consent Mode v2, so tracking respects privacy requirements such as GDPR.
• Looker Studio reports and documentation of what is set up, where and why.

Stages and timeline

1. Audit. We map what is installed, compare numbers across systems and find duplicates and gaps.
2. Measurement plan. We agree which events and conversions matter for your business and where they should go.
3. Fix release. Changes go into a separate container version, are tested in preview mode and published without risk to live campaigns.
4. Validation on real data. Test and real orders, reconciled with your CRM or store platform.
5. Documentation and reports. You get a description of the setup and a dashboard you can use every week.

A typical project takes from 14 days; part of that time is watching real data after the release.

What affects the price

Tools and platforms

Google Analytics 4, Google Tag Manager (web and server containers), Stape, Meta Pixel and Conversions API, Google Ads Enhanced Conversions, Microsoft Clarity, Looker Studio. Platforms: Shopify, WooCommerce, WordPress, Webflow, BigCommerce and Next.js. Once tracking is clean, you can build ads on top of it — that is our Google Ads and Meta Ads management service.

An example from our work: a Shopify tracking audit

A Shopify hardware store ran three tracking layers at once: GTM with server-side tagging via Stape, native Shopify apps for Google, Facebook and Microsoft, and Shopify’s own attribution. The GTM container loaded three times on every page — from the theme and from two custom pixels — so Google Ads, Microsoft Clarity and Conversion Linker tags fired three times. In the baseline period 40.7% of online orders had no customer journey data, against a target below 15%.

We delivered a report in English and Ukrainian, a GTM fix release with a step-by-step publishing guide, and a plan for investigating orders without a source, with an honest split between what depends on the setup and what depends on traffic behaviour. After the release each tag fires once. The full story is in the Shopify tracking audit case study. Another example is a Shopify supplement store where we set up Meta Pixel, dataLayer events and a Google product feed.

How to check your tracking yourself

1. Compare a week of orders in your store platform or CRM with purchases in GA4 and conversions in your ad accounts. A gap of a few percent is normal; double or half is not.
2. Open the GA4 traffic source report and look at the share of “(not set)”, “Unassigned” and “Direct”. If it is large, sources are being lost.
3. Install Tag Assistant and walk through a purchase: count how many times the purchase or lead tag fires.
4. Submit a test enquiry with a UTM tag and check that it reaches analytics and the CRM with the right source.

If these steps raise more questions than answers, it is time for an audit.

How to choose a contractor

• They start with an audit instead of adding “one more pixel” on top of the existing ones.
• They explain which discrepancies are normal and which are errors. Systems never match perfectly.
• They publish through versions and preview mode, so campaigns do not break.
• They leave documentation; without it the next contractor starts from scratch.
• They take cookie consent and privacy requirements into account.

How the UTM → GA4 → CRM chain works and what you can set up yourself is explained in lead source tracking for small businesses. For stores, the purchase funnel with GA4 events is covered in abandoned carts.

Want to know which numbers to trust? Get in touch and we will start with a tracking audit. If you need a wider review of the site, see our technical audit.