> 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/industries/marketing-and-advertising/ # Marketing and advertising: companies and the tools they run This group covers agencies and service firms that plan campaigns, buy media and create advertising for other organizations. Browse the organizations, the technology they run and how big they are. By Enrich.chat Editorial. Updated October 21, 2026. **Short answer:** Marketing and advertising agencies include SEO, WPP, Publicis, Publicis Groupe and Publicis Re:Sources. Below are the tools they run most often, how they spread by size and how to reach agency owners, heads of strategy and operations leaders. ## What counts as marketing and advertising? This group covers agencies and service firms that plan campaigns, buy media and create advertising for other organizations. ## Which marketing and advertising agencies are listed here? They include SEO, WPP, Publicis, Publicis Groupe and Publicis Re:Sources. 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 | | [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 | | 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 | | MarketSource | 10,000 to 25,000 | 8 | | [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 | | [Omnicom](https://enrich.chat/company/omnicom/) | 50,000 to 100,000 | 17 | | [Omnicom Media Group](https://enrich.chat/company/omnicom-media-group/) | 50,000 to 100,000 | 9 | | [Publicis](https://enrich.chat/company/publicis/) | 100,000+ | 3 | | [Publicis Groupe](https://enrich.chat/company/publicis-groupe/) | 100,000+ | 18 | | [Publicis Re:Sources](https://enrich.chat/company/publicis-re-sources/) | 50,000 to 100,000 | 5 | | [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 | | [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 | | [WPP](https://enrich.chat/company/wpp/) | 100,000+ | 14 | ## What technology do marketing and advertising agencies use? These tools stand out among marketing and advertising agencies: each is detected more often here than across all the organizations listed. The tick on each bar marks that wider average. **Figure: Tools that stand out among marketing and advertising agencies.** Bars for the share of listed marketing and advertising agencies where each tool was detected, with a tick for the share across all listed organizations: WordPress (self-hosted) 62% against 50%, Gmail 31% against 18%, Google Workspace 31% against 18%, Atlassian Cloud 27% against 18%, HubSpot 20% against 13%, Mailchimp SPF 20% against 6%. *Share of listed marketing and advertising agencies where each tool was detected. The tick marks the share across all listed organizations.* ## How big are marketing and advertising agencies? The columns show how the listed marketing and advertising agencies spread across six size ranges. **Figure: Size of marketing and advertising agencies.** Six columns for the share of listed marketing and advertising agencies in each size range from 2,000 to over 100,000 employees: 2-5K 59%, 5-10K 20%, 10-25K 14%, 25-50K 2%, 50-100K 2%, 100K+ 3%. *Share of listed marketing and advertising agencies in each size range.* ## Marketing and advertising by tool Open a tool to see the marketing and advertising agencies that use it. [Google Tag Manager](https://enrich.chat/companies-using/google-tag-manager/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/)[Gmail](https://enrich.chat/companies-using/gmail/marketing-and-advertising/)[Google Workspace](https://enrich.chat/companies-using/google-workspace/marketing-and-advertising/) ## How do you reach agency owners, heads of strategy and operations leaders at marketing and advertising agencies? Pick an organization from the table, then ask your AI agent for the people in the roles you sell to. ```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 are there? Marketing and advertising agencies include SEO, WPP, Publicis, Publicis Groupe and Publicis Re:Sources. The page lists a selection of larger ones with links to their profiles. ### What technology do marketing and advertising agencies use most? Marketing and advertising agencies are most often detected running WordPress (self-hosted), Gmail, Google Workspace and Atlassian Cloud. ### How big are marketing and advertising agencies? Listed marketing and advertising agencies range from about 2,000 employees to well over 100,000. The columns on this page show the spread. ### Who do you sell to in marketing and advertising? Usually agency owners, heads of strategy and operations leaders. Ask your AI agent to use www.enrich.chat to find them with verified work emails. ## Try this prompt Find agency owners, heads of strategy and operations leaders ```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/) - [Information technology and services](https://enrich.chat/industries/information-technology-and-services/) - [Hospitals and health care](https://enrich.chat/industries/hospitals-and-health-care/) - [Retail](https://enrich.chat/industries/retail/) - [Higher education](https://enrich.chat/industries/higher-education/) - [Government administration](https://enrich.chat/industries/government-administration/) - [Financial services](https://enrich.chat/industries/financial-services/) - [Banking](https://enrich.chat/industries/banking/) - [Insurance](https://enrich.chat/industries/insurance/) - [Tech stack lookup](https://enrich.chat/tools/tech-stack-lookup/)