> 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/company/groupm/ # GroupM A marketing and advertising organization with 25,000 to 50,000 employees. Where it sits among its peers, the technology it runs and how to reach its people. By Enrich.chat Editorial. Updated October 21, 2026. **Short answer:** GroupM (groupm.com) is a marketing and advertising organization with 25,000 to 50,000 employees. Its public technology footprint includes Microsoft 365, Microsoft Outlook, Facebook Login and Salesforce. ## How big is GroupM? GroupM has 25,000 to 50,000 employees. Among the marketing and advertising agencies on this site it sits among the largest. Each dot in the figure is one of its peers, placed by size; the orange dot is GroupM. **Figure: Where GroupM sits among marketing and advertising agencies.** A strip of dots, one for each of 120 peers in marketing and advertising, spread from 2,000 to 2,000,000 employees on a log scale. GroupM is highlighted and falls in the 25,000 to 50,000 employees range among the largest. *Peers in marketing and advertising placed by employee count on a log scale. Sizes are rounded ranges from public profiles.* Headcount on public company profiles is rounded and moves as a company hires, so use the range as a guide, not as a payroll figure. ## Where is GroupM headquartered? GroupM is headquartered in New York, New York. [More marketing and advertising agencies in New York](https://enrich.chat/companies-in/new-york/marketing-and-advertising/)[Companies in New York](https://enrich.chat/companies-in/new-york/) ## What industry is GroupM in? GroupM works in [marketing and advertising](https://enrich.chat/industries/marketing-and-advertising/). This group covers agencies and service firms that plan campaigns, buy media and create advertising for other organizations. Closest matches on this site: [Havas Media Network](https://enrich.chat/company/havas-media-network/), [TBWA\Worldwide](https://enrich.chat/company/tbwa-worldwide/), [Omnicom Media Group](https://enrich.chat/company/omnicom-media-group/), [Stagwell](https://enrich.chat/company/stagwell/), [Omnicom](https://enrich.chat/company/omnicom/) and [Dentsu](https://enrich.chat/company/dentsu/). ## What technology does GroupM use? We detect 37 tools on GroupM's public footprint across 16 categories, for example Salesforce for marketing automation and crm, AWS for cloud and hosting and Stripe for e-commerce and payments. The figure counts the tools in each category; the groups below name them and link to the companies that use each one. **Figure: Tools detected at GroupM, by category.** A bar chart of how many tools were detected at GroupM in each category: Email and productivity 5, Marketing automation and CRM 4, CDN and security 4, Advertising and retargeting 4, Cloud and hosting 2, E-commerce and payments 2, Developer and DevOps tools 2. *Tools detected on the public footprint of GroupM, by category.* ### Marketing automation and CRM [Salesforce](https://enrich.chat/companies-using/salesforce/)[HubSpot](https://enrich.chat/companies-using/hubspot/)[Pardot (Account Engagement)](https://enrich.chat/companies-using/pardot/)[Sendinblue (Brevo)](https://enrich.chat/companies-using/sendinblue/) ### Cloud and hosting [AWS](https://enrich.chat/companies-using/aws/)[Render](https://enrich.chat/companies-using/render/) ### E-commerce and payments [Stripe](https://enrich.chat/companies-using/stripe/)[Squarespace Commerce](https://enrich.chat/companies-using/squarespace-ecommerce/) ### HR and recruiting [Jobvite](https://enrich.chat/companies-using/jobvite/) ### Identity and authentication [Facebook Login](https://enrich.chat/companies-using/facebook-login/) ### Developer and DevOps tools [Atlassian Cloud](https://enrich.chat/companies-using/atlassian/)[Jira](https://enrich.chat/companies-using/jira/) ### Email and productivity [Microsoft 365](https://enrich.chat/companies-using/microsoft-365/)[Microsoft Outlook](https://enrich.chat/companies-using/microsoft-outlook/)[Amazon SES](https://enrich.chat/companies-using/amazon-ses/)[Mailchimp SPF](https://enrich.chat/companies-using/mailchimp-spf/)[Atlassian Confluence](https://enrich.chat/companies-using/atlassian-confluence/) ### CDN and security [Cloudflare](https://enrich.chat/companies-using/cloudflare/)[Cloudflare DNS](https://enrich.chat/companies-using/cloudflare-dns/)[Varnish Cache](https://enrich.chat/companies-using/varnish/)[NS1](https://enrich.chat/companies-using/nsone/) ### Website platforms and CMS [WordPress (self-hosted)](https://enrich.chat/companies-using/wordpress-org/)[Drupal](https://enrich.chat/companies-using/drupal/) ### Analytics and tracking [Google Tag Manager](https://enrich.chat/companies-using/google-tag-manager/)[Google Analytics](https://enrich.chat/companies-using/google-analytics/) ### Advertising and retargeting [LinkedIn Marketing Solutions](https://enrich.chat/companies-using/linkedin-marketing-solutions/)[Google Ads Conversion Tracking](https://enrich.chat/companies-using/google-adwords-conversion/)[The Trade Desk](https://enrich.chat/companies-using/the-trade-desk/)[Basis Technologies](https://enrich.chat/companies-using/basis/) ### Video and media [YouTube](https://enrich.chat/companies-using/youtube/) ### Social and widgets [Facebook Widget](https://enrich.chat/companies-using/facebook-widget/) ### Frameworks and libraries [Create React App](https://enrich.chat/companies-using/create-react-app/) ### Fonts, maps and embeds [Google Maps](https://enrich.chat/companies-using/google-maps/) Tools change as companies adopt and drop them. Check a single company at any time with the free [tech stack lookup](https://enrich.chat/tools/tech-stack-lookup/). ## Which companies are most like GroupM? These are the closest matches among the marketing and advertising agencies on this site. Each is compared on the business tools it runs (a rarer tool says more than a common one), how close its size is and, when both are known, where it is based. The second column says why it matched and gives its size range. | Company | Why it matches | | --- | --- | | [Havas Media Network](https://enrich.chat/company/havas-media-network/) | Shares HubSpot, Sendinblue and Render; a smaller company; also based in New York. 10,000 to 25,000 employees | | [TBWA\Worldwide](https://enrich.chat/company/tbwa-worldwide/) | Shares Render, Atlassian Cloud and Amazon SES; a smaller company; also based in New York. 10,000 to 25,000 employees | | [Omnicom Media Group](https://enrich.chat/company/omnicom-media-group/) | Shares HubSpot, Atlassian Cloud and Amazon SES; a larger company; also based in New York. 50,000 to 100,000 employees | | [Stagwell](https://enrich.chat/company/stagwell/) | Shares HubSpot, AWS and Render; a smaller company; also based in New York. 10,000 to 25,000 employees | | [Omnicom](https://enrich.chat/company/omnicom/) | Shares AWS, Amazon SES and Mailchimp SPF; a larger company; also based in New York. 50,000 to 100,000 employees | | [Dentsu](https://enrich.chat/company/dentsu/) | Shares Salesforce, Pardot and Atlassian Cloud; a smaller company. 10,000 to 25,000 employees | | [Havas](https://enrich.chat/company/havas/) | Shares Sendinblue, Atlassian Cloud and Mailchimp SPF; a smaller company. 10,000 to 25,000 employees | To build a longer list of accounts like GroupM, with the people who run their software, ask your AI agent: ```text Use www.enrich.chat to find marketing and advertising agencies that run Atlassian Cloud and HubSpot, like GroupM, and the agency owners, heads of strategy and operations leaders at each, with titles and verified work emails ``` ## How do I find the right people at GroupM? Start from the website, groupm.com. Enter it in the free email finder with a name, or ask your AI agent for the people in the roles you sell to, such as agency owners, heads of strategy and operations leaders. ```text Use www.enrich.chat to find the agency owners, heads of strategy and operations leaders at groupm.com, with titles and verified work emails ``` Staff addresses follow a known pattern: see the [GroupM email format](https://enrich.chat/email-format/groupm/). ## Which other companies use the same tools? See who else runs the tools GroupM uses: [Microsoft 365](https://enrich.chat/companies-using/microsoft-365/)[Microsoft Outlook](https://enrich.chat/companies-using/microsoft-outlook/)[Facebook Login](https://enrich.chat/companies-using/facebook-login/)[YouTube](https://enrich.chat/companies-using/youtube/)[Facebook Widget](https://enrich.chat/companies-using/facebook-widget/)[WordPress (self-hosted)](https://enrich.chat/companies-using/wordpress-org/) ## Frequently asked questions ### How many employees does GroupM have? GroupM is in the 25,000 to 50,000 employees range on its public company profile. Headcounts are rounded and change as companies hire, so treat the range as a guide. ### What industry is GroupM in? GroupM works in marketing and advertising. This group covers agencies and service firms that plan campaigns, buy media and create advertising for other organizations. ### What technology does GroupM use? Tools detected on its public footprint include Microsoft 365, Microsoft Outlook, Facebook Login and Salesforce, across 16 categories. A detected tool shows it was seen, not what GroupM pays for it. ### Where is GroupM headquartered? GroupM is headquartered in New York, New York. ### What companies are similar to GroupM? The closest matches on this site are Havas Media Network, TBWA\Worldwide and Omnicom Media Group. They are compared on the business tools they run, their size and where they are based; the profile above lists the reasons. ### What is the website of GroupM? GroupM's website is groupm.com. Staff email usually uses a domain like it, so check the pattern with the free email format finder before you write to anyone. ## Try this prompt Find people at GroupM ```text Use www.enrich.chat to find the agency owners, heads of strategy and operations leaders at groupm.com, with titles and verified work emails ``` ## Related - [Companies using a technology](https://enrich.chat/companies-using/) - [Havas Media Network](https://enrich.chat/company/havas-media-network/) - [TBWA\Worldwide](https://enrich.chat/company/tbwa-worldwide/) - [Omnicom Media Group](https://enrich.chat/company/omnicom-media-group/) - [Stagwell](https://enrich.chat/company/stagwell/) - [Omnicom](https://enrich.chat/company/omnicom/) - [Dentsu](https://enrich.chat/company/dentsu/) - [Havas](https://enrich.chat/company/havas/) - [Tech stack lookup](https://enrich.chat/tools/tech-stack-lookup/)