# The 30 largest Advertising Services companies in the Hauts-de-Seine department

Tamtam tracks 281 Advertising Services companies headquartered in the Hauts-de-Seine department. This list ranks the 30 largest by number of employees on LinkedIn, led by Havas, JCDecaux and Solocal. Their median headcount is 348. Half of them were founded in 1996 or later. The most common headquarters are Boulogne-Billancourt (11), Neuilly-sur-Seine (5) and Puteaux (4).

This selection features large and mid-sized advertising services companies in Hauts-de-Seine, demonstrating a strong concentration of marketing and communication expertise. Havas, for example, is a global communications network, while JCDecaux specializes in outdoor advertising. Solocal provides digital solutions for businesses, and K Particulier focuses on health communication.

The companies are primarily located in Boulogne-Billancourt, which hosts Solocal, K Particulier, and Cityz Media, among others, indicating a geographical cluster for advertising services within the department. Many of these firms, such as JCDecaux (founded 1964) and RC Group (founded 1990), have been established for several decades, contributing to a mature industry presence.

🇫🇷 Hauts-de-Seine · 30 companies · Updated Nov 12, 2026

| # | Company | Industry | Headquarters | Employees | Founded |
|---|---|---|---|---|---|
| 1 | [Havas](https://www.tamtam.ai/c/havas) (havas.com)<br>Global communications network providing integrated, data-driven, AI-powered marketing and communication solutions through collaborative, innovative teams worldwide. | Advertising Services | 🇫🇷 Puteaux | 11,029 |  |
| 2 | [JCDecaux](https://www.tamtam.ai/c/jcdecaux) (jcdecaux.com)<br>Global leader in outdoor advertising, specializing in street furniture, transport advertising, and billboard displays worldwide. | Advertising Services | 🇫🇷 Neuilly-sur-Seine | 6,312 | 1964 |
| 3 | [Solocal](https://www.tamtam.ai/c/solocal-boulogne-billancourt) (solocal.com)<br>Providing digital solutions to businesses in France through Search Local and Digital Marketing services, focusing on local content, personalized marketing, and growth acceleration | Advertising Services | 🇫🇷 Boulogne-Billancourt | 2,935 |  |
| 4 | [K Particulier](https://www.tamtam.ai/c/k-particulier) (k-particulier.fr)<br>Specialized Health Communication Agency focused on Medical Education, producing high-value content for healthcare professionals in areas such as professional obligations, doctor-patient communication, and digital platforms | Advertising Services | 🇫🇷 Boulogne-Billancourt | 2,462 | 1996 |
| 5 | [MEDIAPOST](https://www.tamtam.ai/c/mediapost-montrouge) (mediaposte.fr)<br>Targeted distribution of advertising mail and proximity communication solutions using geographical and behavioral data to support client acquisition and loyalty across France. | Advertising Services | 🇫🇷 Montrouge | 1,306 |  |
| 6 | [DMF sales&marketing](https://www.tamtam.ai/c/dmf-sales-and-marketing) (dmf.fr)<br>A leading provider of outsourced sales and marketing services in France, specializing in sales force, promotions, merchandising, direct sales, and commercial deployment strategies | Advertising Services | 🇫🇷 Asnières-sur-Seine | 703 | 2001 |
| 7 | [Cityz Media](https://www.tamtam.ai/c/cityz-media) (cityzmedia.fr)<br>It specializes in outdoor communication, providing advertising solutions in various public spaces, including digital screens in shopping centers and buses. | Advertising Services | 🇫🇷 Boulogne-Billancourt | 692 |  |
| 8 | [RC Group](https://www.tamtam.ai/c/rc-group) (rc-group.fr)<br>Designs, manufactures, and installs diverse point-of-sale communication supports for luxury, cosmetics, pharmacy, and spirits sectors, adaptable to client needs. | Advertising Services | 🇫🇷 Boulogne-Billancourt | 583 | 1990 |
| 9 | [IMPACT Sales & Marketing France](https://www.tamtam.ai/c/impact-sales-and-marketing-france) (agence-impact.com)<br>Specializes in field marketing with sales force, merchandising, and customer experience solutions focused on achieving business objectives. | Advertising Services | 🇫🇷 Levallois-Perret | 533 | 2005 |
| 10 | [Havas Worldwide Paris](https://www.tamtam.ai/c/havas-worldwide-paris) (havasparis.com)<br>Integrated communication agency offering strategic advice across brand culture, retail, reputation, digital transformation, content, and international consulting services. | Advertising Services | 🇫🇷 Puteaux | 481 |  |
| 11 | [TBWA Paris](https://www.tamtam.ai/c/tbwa-paris) (tbwa-paris.com)<br>Applies a 'disruption' philosophy, conceptualized by Jean-Marie Dru, to marketing strategies, documented in several books. Develops innovative Media Arts approaches. | Advertising Services | 🇫🇷 Boulogne-Billancourt | 443 |  |
| 12 | [MEDIATRANSPORTS](https://www.tamtam.ai/c/mediatransports) (mediatransports.com)<br>Manages advertising in public transport networks across French cities, including metros, buses, trams, and over 800 train stations nationwide. | Advertising Services | 🇫🇷 Boulogne-Billancourt | 427 |  |
| 13 | [Armada](https://www.tamtam.ai/c/armada) (agencearmada.com)<br>Specializes in commercial outsourcing including sales force deployment, strategic consulting, and full marketing and sales function externalization with result-based fees. | Advertising Services | 🇫🇷 Suresnes | 410 | 2008 |
| 14 | [Journey](https://www.tamtam.ai/c/journey-boulogne-billancourt) (lagalaxee.com)<br>LAGALAXEE designs and produces meaningful communication experiences through expert advice and teamwork, specializing in audiovisual content, interactive solutions, technical event services, and communication space design | Advertising Services | 🇫🇷 Boulogne-Billancourt | 371 |  |
| 15 | [BIBICHE (ex-Makassar)](https://www.tamtam.ai/c/bibiche-ex-makassar) (makassar.fr)<br>A corporate communication agency specializing in branding, B2B communication, internal communication, and CSR for industrial and networked companies, founded in 2002 | Advertising Services | 🇫🇷 Clichy | 348 | 2002 |
| 16 | [Districom Sales and Marketing](https://www.tamtam.ai/c/districom-sales-and-marketing) (districomsam.fr)<br>Designing and deploying sales strategies, focusing on sales animation, sales force, and merchandising for various economic sectors. | Advertising Services | 🇫🇷 Asnières-sur-Seine | 343 | 1973 |
| 17 | [GUTENBERG](https://www.tamtam.ai/c/gutenberg) (gutenberg.agency)<br>Design, create, produce, and deliver engaging content and packaging solutions supporting brands in retail, fashion, food, and services. | Advertising Services | 🇫🇷 Boulogne-Billancourt | 327 | 1979 |
| 18 | [M6 Unlimited](https://www.tamtam.ai/c/m6-unlimited) (m6unlimited.fr)<br>M6 Publicité provides customized communication solutions to reach over 32 million French consumers through a wide range of media assets | Advertising Services | 🇫🇷 Neuilly-sur-Seine | 323 | 1987 |
| 19 | [FullSIX Groupe](https://www.tamtam.ai/c/fullsix-groupe) (betcfullsix.com)<br>Leading independent European communication and marketing consultancy group, specializing in digital and data-centric strategies to enhance client performance and customer communication. | Advertising Services | 🇫🇷 Puteaux | 289 | 1998 |
| 20 | [Extreme Group](https://www.tamtam.ai/c/extreme-group) (extreme.fr)<br>Independent consulting firm specializing in gastronomy, beauty, and societal issues, offering branding, packaging, event management, and digital services to diverse clients globally. | Advertising Services | 🇫🇷 Clichy | 276 | 1995 |
| 21 | [Clear Channel France](https://www.tamtam.ai/c/clear-channel-france) (cityzmedia.fr)<br>A major player in outdoor advertising with a presence in 30 countries, offering diverse advertising solutions through 760k advertising displays worldwide | Advertising Services | 🇫🇷 Boulogne-Billancourt | 272 |  |
| 22 | [PJMS](https://www.tamtam.ai/c/pjms) (solocal.com)<br>Specializes in multichannel marketing data solutions, ensuring data quality, business growth, ROI control, and lead generation for diverse clients. | Advertising Services | 🇫🇷 Boulogne-Billancourt | 266 |  |
| 23 | [TechSell](https://www.tamtam.ai/c/techsell) (techsell.fr)<br>Specializes in recruiting, training, and managing sales teams to enhance brand presence and shopper experience across France retail environments. | Advertising Services | 🇫🇷 Neuilly-sur-Seine | 261 | 2006 |
| 24 | [Catalina Marketing France](https://www.tamtam.ai/c/catalina-marketing-france) (catalinamarketing.fr)<br>Catalina France, part of Catalina Marketing Corporation, specializes in personalized communication and relationship marketing leveraging real consumer purchase behavior data globally | Advertising Services | 🇫🇷 Boulogne-Billancourt | 255 | 1994 |
| 25 | [Havas Play 🇫🇷](https://www.tamtam.ai/c/havas-play) (havasplay.com)<br>Helping brands connect culturally and authentically with people's passions through meaningful stories, content, and engaging experiences. | Advertising Services | 🇫🇷 Puteaux | 243 | 1999 |
| 26 | [McCann Paris](https://www.tamtam.ai/c/mccann-paris) (mccann.fr)<br>Leading French agency of a global advertising network with clients such as L'Oréal, Nespresso, and Mastercard, operating in over 130 countries | Advertising Services | 🇫🇷 Neuilly-sur-Seine | 232 | 1927 |
| 27 | [ComeBack Graphic](https://www.tamtam.ai/c/comeback-graphic) (comeback.fr)<br>ComeBack is a marketing production agency specializing in customized communication solutions for ambitious brands, optimizing campaigns, managing actions, and innovating with FeedBack tools | Advertising Services | 🇫🇷 Saint-Cloud | 222 | 2002 |
| 28 | [PLS](https://www.tamtam.ai/c/pls) (plsfrance.fr)<br>PLS is a Press Agency specializing in Professional Press, offering tailored communication plans for various target audiences within different budgets | Advertising Services | 🇫🇷 Neuilly-sur-Seine | 215 | 1995 |
| 29 | [opper](https://www.tamtam.ai/c/opper) (opper.io)<br>A leading French intelligence company providing data and software solutions to media and advertising clients across Europe Specializing in advertising and sales intelligence | Advertising Services | 🇫🇷 Issy-les-Moulineaux | 213 | 1987 |
| 30 | [Qwamplify](https://www.tamtam.ai/c/qwamplify) (qwamplify.com)<br>Qwamplify is a marketing and media solutions company specializing in accelerating purchase decisions for both B2C and B2B clients through unique brand experiences | Advertising Services | 🇫🇷 Levallois-Perret | 194 | 2003 |

## How this list is built

Every company on this list has a Tamtam company profile. The industry is the one the company gives on LinkedIn; categories such as SaaS or fintech are classified by Tamtam's AI from the company's website and LinkedIn page; and the headquarters city must match the company's own address. Companies are ranked by the number of employees on LinkedIn, and the list is refreshed every night. Classifications can be wrong, so treat the list as a starting point rather than an official ranking. Last updated Nov 12, 2026.

## More company lists in the Hauts-de-Seine department

- [The largest companies in the Hauts-de-Seine department](https://www.tamtam.ai/l/largest-companies-hauts-de-seine) (5,160)
- [Multinational companies in the Hauts-de-Seine department](https://www.tamtam.ai/l/multinational-companies-hauts-de-seine) (1,231)
- [IT services companies in the Hauts-de-Seine department](https://www.tamtam.ai/l/it-services-companies-hauts-de-seine) (737)
- [IT Services and IT Consulting companies in the Hauts-de-Seine department](https://www.tamtam.ai/l/it-services-and-it-consulting-companies-hauts-de-seine) (706)
- [Professional services firms in the Hauts-de-Seine department](https://www.tamtam.ai/l/professional-services-firms-hauts-de-seine) (629)
- [Consulting firms in the Hauts-de-Seine department](https://www.tamtam.ai/l/consulting-firms-hauts-de-seine) (563)
- [Companies with in-house R&D in the Hauts-de-Seine department](https://www.tamtam.ai/l/r-and-d-companies-hauts-de-seine) (510)
- [SaaS companies in the Hauts-de-Seine department](https://www.tamtam.ai/l/saas-companies-hauts-de-seine) (389)
- [Business Consulting and Services companies in the Hauts-de-Seine department](https://www.tamtam.ai/l/business-consulting-and-services-companies-hauts-de-seine) (304)
- [Software Development companies in the Hauts-de-Seine department](https://www.tamtam.ai/l/software-development-companies-hauts-de-seine) (301)
- [Retail chains in the Hauts-de-Seine department](https://www.tamtam.ai/l/retail-chains-hauts-de-seine) (292)
- [Manufacturers in the Hauts-de-Seine department](https://www.tamtam.ai/l/manufacturers-hauts-de-seine) (285)
- [Marketing and communications agencies in the Hauts-de-Seine department](https://www.tamtam.ai/l/marketing-agencies-hauts-de-seine) (235)
- [Subscription businesses in the Hauts-de-Seine department](https://www.tamtam.ai/l/subscription-businesses-hauts-de-seine) (228)
- [Hardware manufacturers in the Hauts-de-Seine department](https://www.tamtam.ai/l/hardware-companies-hauts-de-seine) (199)
- [Financial services firms in the Hauts-de-Seine department](https://www.tamtam.ai/l/financial-services-firms-hauts-de-seine) (198)
- [Companies with a mobile app in the Hauts-de-Seine department](https://www.tamtam.ai/l/companies-with-mobile-app-hauts-de-seine) (189)
- [Critical infrastructure operators in the Hauts-de-Seine department](https://www.tamtam.ai/l/critical-infrastructure-operators-hauts-de-seine) (169)
- [AI companies in the Hauts-de-Seine department](https://www.tamtam.ai/l/ai-companies-hauts-de-seine) (159)
- [Education providers in the Hauts-de-Seine department](https://www.tamtam.ai/l/education-companies-hauts-de-seine) (159)
- [Cybersecurity companies in the Hauts-de-Seine department](https://www.tamtam.ai/l/cybersecurity-companies-hauts-de-seine) (154)
- [Distributors and wholesalers in the Hauts-de-Seine department](https://www.tamtam.ai/l/distributors-and-wholesalers-hauts-de-seine) (154)
- [Recruitment and staffing agencies in the Hauts-de-Seine department](https://www.tamtam.ai/l/recruitment-agencies-hauts-de-seine) (152)
- [Energy companies in the Hauts-de-Seine department](https://www.tamtam.ai/l/energy-companies-hauts-de-seine) (144)

## The same list elsewhere in France

- [Advertising Services companies in France](https://www.tamtam.ai/l/advertising-services-companies-france) (2,360)
- [Advertising Services companies in Île-de-France](https://www.tamtam.ai/l/advertising-services-companies-ile-de-france) (1,264)
- [Advertising Services companies in Auvergne-Rhône-Alpes](https://www.tamtam.ai/l/advertising-services-companies-auvergne-rhone-alpes) (217)
- [Advertising Services companies in Provence-Alpes-Côte d'Azur](https://www.tamtam.ai/l/advertising-services-companies-provence-alpes-cote-dazur) (146)
- [Advertising Services companies in the Rhône department](https://www.tamtam.ai/l/advertising-services-companies-rhone) (126)
- [Advertising Services companies in Grand Est](https://www.tamtam.ai/l/advertising-services-companies-grand-est) (124)
- [Advertising Services companies in Occitanie](https://www.tamtam.ai/l/advertising-services-companies-occitanie) (109)
- [Advertising Services companies in Nouvelle-Aquitaine](https://www.tamtam.ai/l/advertising-services-companies-nouvelle-aquitaine) (106)
- [Advertising Services companies in Pays de la Loire](https://www.tamtam.ai/l/advertising-services-companies-pays-de-la-loire) (96)
- [Advertising Services companies in Hauts-de-France](https://www.tamtam.ai/l/advertising-services-companies-hauts-de-france) (91)
- [Advertising Services companies in the Bouches-du-Rhône department](https://www.tamtam.ai/l/advertising-services-companies-bouches-du-rhone) (69)
- [Advertising Services companies in the Nord department](https://www.tamtam.ai/l/advertising-services-companies-nord) (68)
- [Advertising Services companies in the Gironde department](https://www.tamtam.ai/l/advertising-services-companies-gironde) (65)
- [Advertising Services companies in Brittany](https://www.tamtam.ai/l/advertising-services-companies-brittany) (58)
- [Advertising Services companies in the Loire-Atlantique department](https://www.tamtam.ai/l/advertising-services-companies-loire-atlantique) (56)
- [Advertising Services companies in the Haute-Garonne department](https://www.tamtam.ai/l/advertising-services-companies-haute-garonne) (45)
- [Advertising Services companies in the Alpes-Maritimes department](https://www.tamtam.ai/l/advertising-services-companies-alpes-maritimes) (41)
- [Advertising Services companies in Centre-Val de Loire](https://www.tamtam.ai/l/advertising-services-companies-centre-val-de-loire) (41)
- [Advertising Services companies in Normandy](https://www.tamtam.ai/l/advertising-services-companies-normandy) (39)
- [Advertising Services companies in Paris](https://www.tamtam.ai/l/advertising-services-companies-paris) (832)
- [Advertising Services companies in Lyon](https://www.tamtam.ai/l/advertising-services-companies-lyon) (99)
- [Advertising Services companies in Boulogne-Billancourt](https://www.tamtam.ai/l/advertising-services-companies-boulogne-billancourt) (77)
- [Advertising Services companies in Levallois-Perret](https://www.tamtam.ai/l/advertising-services-companies-levallois-perret) (50)
- [Advertising Services companies in Bordeaux](https://www.tamtam.ai/l/advertising-services-companies-bordeaux) (41)

## The same list elsewhere

- [Advertising Services companies in the world](https://www.tamtam.ai/l/advertising-services-companies-in-the-world) (7,500)
- [Advertising Services companies in Europe](https://www.tamtam.ai/l/advertising-services-companies-in-europe) (4,448)

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Source: https://www.tamtam.ai/l/advertising-services-companies-hauts-de-seine