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Google Tag Manager Agency: Industrialize Your Tracking

For complex ecosystems, a freelancer sometimes isn't enough.

Our GTM Agency offering is built for organizations that need structure. We implement tag governance, strict QA processes, and ongoing maintenance to ensure your data collection stays operational 365 days a year.

Request a free quote

The strength of a GTM Agency

01

Security & Access

We audit who has access to what. No more 2018 interns still holding publish rights on your live site.

02

Documentation

Every published version is fully documented. We know exactly which tag was added, when, and by whom — complete traceability at all times.

03

Custom Templates

We build our own Custom Templates to standardize your implementations and eliminate error-prone, one-off setups.

Our GTM Agency Methodology

01

Security Audit

Third-party script review and protection against injection vulnerabilities.

02

Access Management

Strict administration of user roles and permissions.

03

Ongoing Maintenance

Regular container updates aligned with site changes and new requirements.

Technologies & tools

Multi-platform expertise

0+
Years of Experience

Data & tracking ecosystem

0+
Projects Completed

All company sizes

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People Trained

Analytics & tracking

Matomo
Matomo
Google Analytics
Google Analytics
Piano Analytics
Piano Analytics
Adobe Analytics
Adobe Analytics
etracker
etracker
Google Ads
Google Ads
Meta / Facebook Ads
Meta / Facebook Ads
LinkedIn Ads
LinkedIn Ads
Bing / Microsoft Ads
Bing / Microsoft Ads
Snapchat
Snapchat
TikTok Ads
TikTok Ads
Pinterest Ads
Pinterest Ads
Google Tag Manager
Google Tag Manager
Commanders Act
Commanders Act
Adobe Launch
Adobe Launch
Tealium
Tealium
sGTM
sGTM
Addingwell
Addingwell
Taggrs
Taggrs
Stape
Stape
Segment
Segment
RudderStack
RudderStack
Didomi
Didomi
Sirdata
Sirdata
Axeptio
Axeptio
OneTrust
OneTrust
Tarteaucitron
Tarteaucitron
Cookiebot
Cookiebot
CookieYes
CookieYes
Looker Studio
Looker Studio
Power BI
Power BI
Qlik
Qlik
Tableau
Tableau
AB Tasty
AB Tasty
Kameleoon
Kameleoon
Optimizely
Optimizely
VWO
VWO
Contentsquare
Contentsquare
Shopify
Shopify
WordPress
WordPress
WooCommerce
WooCommerce
PrestaShop
PrestaShop
Magento
Magento
Webflow
Webflow
Squarespace
Squarespace
HubSpot
HubSpot
Sellsy
Sellsy
Salesforce
Salesforce
Zapier
Zapier
Make
Make
Matomo
Matomo
Google Analytics
Google Analytics
Piano Analytics
Piano Analytics
Adobe Analytics
Adobe Analytics
etracker
etracker
Google Ads
Google Ads
Meta / Facebook Ads
Meta / Facebook Ads
LinkedIn Ads
LinkedIn Ads
Bing / Microsoft Ads
Bing / Microsoft Ads
Snapchat
Snapchat
TikTok Ads
TikTok Ads
Pinterest Ads
Pinterest Ads
Google Tag Manager
Google Tag Manager
Commanders Act
Commanders Act
Adobe Launch
Adobe Launch
Tealium
Tealium
sGTM
sGTM
Addingwell
Addingwell
Taggrs
Taggrs
Stape
Stape
Segment
Segment
RudderStack
RudderStack
Didomi
Didomi
Sirdata
Sirdata
Axeptio
Axeptio
OneTrust
OneTrust
Tarteaucitron
Tarteaucitron
Cookiebot
Cookiebot
CookieYes
CookieYes
Looker Studio
Looker Studio
Power BI
Power BI
Qlik
Qlik
Tableau
Tableau
AB Tasty
AB Tasty
Kameleoon
Kameleoon
Optimizely
Optimizely
VWO
VWO
Contentsquare
Contentsquare
Shopify
Shopify
WordPress
WordPress
WooCommerce
WooCommerce
PrestaShop
PrestaShop
Magento
Magento
Webflow
Webflow
Squarespace
Squarespace
HubSpot
HubSpot
Sellsy
Sellsy
Salesforce
Salesforce
Zapier
Zapier
Make
Make

They trusted us

Our consultants have worked for leading brands

Our team has worked with all types of companies and agencies (marketing, data, tracking) across all verticals (E-commerce, B2B, Tech, Healthcare...) with the same commitment to your data projects.

Auchan
Boulanger
Business & Decision
Crédit Agricole Nord de France
Data Detective
Dim
Disneyland Paris
Equancy
Fleurance Nature
France Télévision Edition numérique
Hanesbrands
Jennyfer
Junto
La Redoute
Leroy Merlin
MGEN
Michelin
Optimal Ways
Playtex
PSA Peugeot Citroën
Showroomprive.com
Wonderbra
Auchan
Boulanger
Business & Decision
Crédit Agricole Nord de France
Data Detective
Dim
Disneyland Paris
Equancy
Fleurance Nature
France Télévision Edition numérique
Hanesbrands
Jennyfer
Junto
La Redoute
Leroy Merlin
MGEN
Michelin
Optimal Ways
Playtex
PSA Peugeot Citroën
Showroomprive.com
Wonderbra

Frequently Asked Questions

Do you handle migrations to server-side GTM? +

Yes. We manage server provisioning (Cloud Run), GTM client configuration, and a phased cutover of your data streams.

Can you work alongside our media agency? +

Yes. We often act as 'Gatekeepers.' When the media agency requests a tag, we audit it, implement it, and validate it before it ever goes live.

Do you perform GTM performance audits? +

Yes. We analyze the impact of GTM on page load time and clean up unused variables to reduce the weight of the gtm.js script.

What guarantee do you offer? +

We guarantee the correct technical firing of all tags. If a tag breaks as a result of our changes, we fix it immediately.

Let's talk about your data challenges

30 minutes to diagnose your data gaps and identify growth levers. No commitment.

Quick Response

We usually respond within 24 hours

Why choose us?

  • Free audit of your tracking configuration
  • Custom quote within 48 hours
  • Tailored support adapted to your needs