> Enrich.chat gives AI agents verified work emails and mobiles. To use it from an agent, read https://enrich.chat/agents.md . This is the Markdown version of https://enrich.chat/companies-using/google-tag-manager/marketing-and-advertising/ # Marketing and advertising agencies using Google Tag Manager Google Tag Manager detected at 84% of the marketing and advertising agencies listed here. Who they are, what else they run and how to reach the people behind it. By Enrich.chat Editorial. Updated October 21, 2026. **Short answer:** Google Tag Manager was detected at 84% of the marketing and advertising agencies listed on this site, including SEO, Publicis Groupe, Omnicom, GroupM and VML. Below are who they are, the other tools they run and how big they are. ## Which marketing and advertising agencies use Google Tag Manager? Google Tag Manager was detected at 84% of the marketing and advertising agencies listed on this site. They include SEO, Publicis Groupe, Omnicom, GroupM and VML. The table lists a selection of larger ones in alphabetical order; names link to company profiles. | Company | Size | Tools detected | | --- | --- | --- | | BAR | 5,000 to 10,000 | 4 | | [Clear Channel Europe](https://enrich.chat/company/clear-channel-europe/) | 10,000 to 25,000 | 14 | | DDB | 5,000 to 10,000 | 21 | | [Dentsu](https://enrich.chat/company/dentsu/) | 10,000 to 25,000 | 34 | | Dentsu Creative | 5,000 to 10,000 | 37 | | Dummies Custom Solutions | 10,000 to 25,000 | 50 | | Epsilon | 10,000 to 25,000 | 46 | | [GroupM](https://enrich.chat/company/groupm/) | 25,000 to 50,000 | 37 | | [Havas](https://enrich.chat/company/havas/) | 10,000 to 25,000 | 25 | | [Havas Media Network](https://enrich.chat/company/havas-media-network/) | 10,000 to 25,000 | 15 | | HH Global | 5,000 to 10,000 | 34 | | IPG Health | 10,000 to 25,000 | 13 | | [IPG Mediabrands](https://enrich.chat/company/ipg-mediabrands/) | 10,000 to 25,000 | 9 | | [JCDecaux](https://enrich.chat/company/jcdecaux/) | 10,000 to 25,000 | 14 | | Leo Burnett | 5,000 to 10,000 | 7 | | [McCann Worldgroup](https://enrich.chat/company/mccann-worldgroup/) | 10,000 to 25,000 | 14 | | Mindshare | 10,000 to 25,000 | 12 | | [MNC Group](https://enrich.chat/company/mnc-group/) | 10,000 to 25,000 | 6 | | [Ogilvy](https://enrich.chat/company/ogilvy/) | 10,000 to 25,000 | 24 | | OMD | 5,000 to 10,000 | 21 | | [Omnicom](https://enrich.chat/company/omnicom/) | 50,000 to 100,000 | 17 | | Other.™ | 5,000 to 10,000 | 11 | | [Publicis Groupe](https://enrich.chat/company/publicis-groupe/) | 100,000+ | 18 | | [Quad](https://enrich.chat/company/quad/) | 10,000 to 25,000 | 38 | | [SEO](https://enrich.chat/company/seo/) | 100,000+ | 11 | | [SMS](https://enrich.chat/company/sms/) | 10,000 to 25,000 | 9 | | [Stagwell](https://enrich.chat/company/stagwell/) | 10,000 to 25,000 | 42 | | Starcom | 5,000 to 10,000 | 7 | | [TBWA\Worldwide](https://enrich.chat/company/tbwa-worldwide/) | 10,000 to 25,000 | 11 | | [VML](https://enrich.chat/company/vml/) | 25,000 to 50,000 | 17 | ## What else do marketing and advertising agencies that use Google Tag Manager run? These tools stand out among them: each is detected more often here than across all the organizations listed. The tick on each bar marks that wider average. **Figure: Tools found with Google Tag Manager at marketing and advertising agencies.** Bars for the share of marketing and advertising agencies using Google Tag Manager where each other tool was also detected: Atlassian Cloud 31%, Gmail 31%, HubSpot 22%, Mailchimp SPF 22%, Pardot (Account Engagement) 19%, WP Engine 18%, Greenhouse 13%, Render 11%. *Share of marketing and advertising agencies using Google Tag Manager where each other tool was also detected. The tick marks the share across all listed organizations.* ## How big are marketing and advertising agencies that use Google Tag Manager? The columns show how these marketing and advertising agencies spread across six size ranges. **Figure: Size of marketing and advertising agencies using Google Tag Manager.** Six columns for the share of marketing and advertising agencies using Google Tag Manager in each size range from 2,000 to over 100,000 employees: 2-5K 56%, 5-10K 24%, 10-25K 16%, 25-50K 2%, 50-100K 1%, 100K+ 2%. *Share of marketing and advertising agencies using Google Tag Manager in each size range.* ## More from Marketing and advertising and Google Tag Manager Other tools in marketing and advertising: [Google Analytics](https://enrich.chat/companies-using/google-analytics/marketing-and-advertising/)[WordPress (self-hosted)](https://enrich.chat/companies-using/wordpress-org/marketing-and-advertising/)[Microsoft Outlook](https://enrich.chat/companies-using/microsoft-outlook/marketing-and-advertising/)[Vimeo](https://enrich.chat/companies-using/vimeo/marketing-and-advertising/)[Microsoft 365](https://enrich.chat/companies-using/microsoft-365/marketing-and-advertising/)[LinkedIn Marketing Solutions](https://enrich.chat/companies-using/linkedin-marketing-solutions/marketing-and-advertising/)[AWS](https://enrich.chat/companies-using/aws/marketing-and-advertising/)[YouTube](https://enrich.chat/companies-using/youtube/marketing-and-advertising/)[Salesforce](https://enrich.chat/companies-using/salesforce/marketing-and-advertising/)[Facebook Login](https://enrich.chat/companies-using/facebook-login/marketing-and-advertising/) Other industries that use Google Tag Manager: [Information technology and services](https://enrich.chat/companies-using/google-tag-manager/information-technology-and-services/)[Hospitals and health care](https://enrich.chat/companies-using/google-tag-manager/hospitals-and-health-care/)[Retail](https://enrich.chat/companies-using/google-tag-manager/retail/)[Higher education](https://enrich.chat/companies-using/google-tag-manager/higher-education/)[Government administration](https://enrich.chat/companies-using/google-tag-manager/government-administration/)[Financial services](https://enrich.chat/companies-using/google-tag-manager/financial-services/)[Banking](https://enrich.chat/companies-using/google-tag-manager/banking/)[Insurance](https://enrich.chat/companies-using/google-tag-manager/insurance/)[Automotive](https://enrich.chat/companies-using/google-tag-manager/automotive/)[Telecommunications](https://enrich.chat/companies-using/google-tag-manager/telecommunications/) ## How do you reach the people who run Google Tag Manager at marketing and advertising agencies? Google Tag Manager is usually owned by marketing analytics and web analytics leaders. Pick an organization from the table, then ask your AI agent for them. ```text Use www.enrich.chat to find agency owners, heads of strategy and operations leaders at [company], with titles and verified work emails ``` ## Frequently asked questions ### Which marketing and advertising agencies use Google Tag Manager? Google Tag Manager was detected at 84% of the marketing and advertising agencies listed here, including SEO, Publicis Groupe, Omnicom, GroupM and VML. ### What else do marketing and advertising agencies that use Google Tag Manager run? They most often also run Atlassian Cloud, Gmail, HubSpot and Mailchimp SPF. ### How is Google Tag Manager detected? From public signals: code and tags on a company's website, HTTP headers and DNS records. A detected tool shows it was seen, not what the company pays for it. ### Who should I contact? Usually marketing analytics and web analytics leaders for the tool, and agency owners, heads of strategy and operations leaders for the buying decision. Ask your AI agent to use www.enrich.chat to find them with verified work emails. ## Try this prompt Find the people who run Google Tag Manager ```text Use www.enrich.chat to find agency owners, heads of strategy and operations leaders at [company], with titles and verified work emails ``` ## Related - [Companies using a technology](https://enrich.chat/companies-using/) - [Marketing and advertising agencies using Google Analytics](https://enrich.chat/companies-using/google-analytics/marketing-and-advertising/) - [Marketing and advertising agencies using WordPress (self-hosted)](https://enrich.chat/companies-using/wordpress-org/marketing-and-advertising/) - [Marketing and advertising agencies using Microsoft Outlook](https://enrich.chat/companies-using/microsoft-outlook/marketing-and-advertising/) - [Marketing and advertising agencies using Vimeo](https://enrich.chat/companies-using/vimeo/marketing-and-advertising/) - [Software and technology services companies using Google Tag Manager](https://enrich.chat/companies-using/google-tag-manager/information-technology-and-services/) - [Hospitals and health systems using Google Tag Manager](https://enrich.chat/companies-using/google-tag-manager/hospitals-and-health-care/) - [Retailers using Google Tag Manager](https://enrich.chat/companies-using/google-tag-manager/retail/) - [Colleges and universities using Google Tag Manager](https://enrich.chat/companies-using/google-tag-manager/higher-education/) - [Tech stack lookup](https://enrich.chat/tools/tech-stack-lookup/)