# The 30 largest professional services firms in Paris

Tamtam tracks 2,241 professional services firms headquartered in Paris. This list ranks the 30 largest by number of employees on LinkedIn, led by Capgemini, Bureau Veritas and Sopra Steria. Their median headcount is 4,659. Half of them were founded in 1989 or later.

These Parisian firms are primarily large professional services groups, specializing in IT, engineering, and various consulting domains. Capgemini, with over 340,000 employees, delivers end-to-end services in strategy, technology, and operations, while Bureau Veritas provides testing, inspection, and certification services. Publicis Groupe helps clients transform their marketing and digital businesses, and Technip Energies focuses on energy engineering and technology.

The data shows a strong concentration of headquarters in Paris for these large service providers. A significant number of these companies, such as Bureau Veritas (founded 1828), ADMR (founded 1945), and Cerfrance (founded 1957), have long operational histories, indicating established players in their respective professional service sectors.

🇫🇷 Paris · 30 companies · Updated Nov 11, 2026

| # | Company | Industry | Headquarters | Employees | Founded |
|---|---|---|---|---|---|
| 1 | [Capgemini](https://www.tamtam.ai/c/capgemini-paris) (capgemini.com)<br>Imagine future organizations, making it real with AI, technology, and people, delivering end-to-end services and solutions across strategy, technology, design, engineering and business operations | IT Services and IT Consulting | 🇫🇷 Paris | 342,989 |  |
| 2 | [Bureau Veritas](https://www.tamtam.ai/c/bureau-veritas) (bureauveritas.com)<br>A global leader in testing, inspection, and certification services, fostering confidence through expertise and independence while addressing crucial societal and environmental challenges | Environmental Services | 🇫🇷 Paris | 55,072 | 1828 |
| 3 | [Sopra Steria](https://www.tamtam.ai/c/sopra-steria) (soprasteria.com)<br>Offers consulting, digital services, and solutions, assisting large companies and organizations with digital transformation, improving competitiveness through technology and collaboration. | IT Services and IT Consulting | 🇫🇷 Paris | 47,609 |  |
| 4 | [Capgemini Engineering](https://www.tamtam.ai/c/capgemini-engineering) (capgemini.com)<br>Engineering R&D services, combining broad industry knowledge and cutting-edge digital and software technologies to accelerate clients' journey towards Intelligent Industry. | Engineering Services | 🇫🇷 Paris | 44,836 |  |
| 5 | [Publicis Groupe](https://www.tamtam.ai/c/publicis-groupe) (publicisgroupe.com)<br>Helps clients transform their marketing and digital businesses, providing expertise in communications, media, data, and technology across 100+ countries. | Advertising Services | 🇫🇷 Paris | 41,020 |  |
| 6 | [Webhelp](https://www.tamtam.ai/c/webhelp) (webhelp.com)<br>The company specializes in creating innovative customer journeys using data insights, AI, and human talent to drive growth for brands worldwide | Outsourcing and Offshoring Consulting | 🇫🇷 Paris | 27,162 |  |
| 7 | [Technip Energies](https://www.tamtam.ai/c/technip-energies) (ten.com)<br>Leading energy engineering & technology company focused on LNG, hydrogen, ethylene, sustainable chemistry, and CO2 management Committed to accelerating the energy transition globally | Engineering Services | 🇫🇷 Paris | 18,645 |  |
| 8 | [Capgemini Invent](https://www.tamtam.ai/c/capgemini-invent) (capgemini.com)<br>Digital innovation, consulting, and transformation services combining strategy, technology, data science, and creative design to help businesses envision and build the future | Business Consulting and Services | 🇫🇷 Paris | 17,000 |  |
| 9 | [ADMR](https://www.tamtam.ai/c/admr) (admr.org)<br>The company is a French network providing personalized, reliable, and quality in-home services from birth to end of life through local associations | Individual and Family Services | 🇫🇷 Paris | 11,291 | 1945 |
| 10 | [SYSTRA](https://www.tamtam.ai/c/systra) (systra.com)<br>Leading engineering and consultancy group specializing in public transport and mobility solutions, connecting people and regions through transport infrastructure development. | Engineering Services | 🇫🇷 Paris | 10,162 |  |
| 11 | [Cerfrance](https://www.tamtam.ai/c/cerfrance) (cerfrance.fr)<br>Provides comprehensive accounting and consulting services across France. Supports businesses and individuals in various sectors with management, administrative, and legal aspects. | Accounting | 🇫🇷 Paris | 5,502 | 1957 |
| 12 | [Groupe SII](https://www.tamtam.ai/c/groupe-sii) (sii-group.com)<br>Engineering and digital services company providing innovative solutions to large groups across various sectors, developing new technologies and evolving information systems. | IT Services and IT Consulting | 🇫🇷 Paris | 5,287 | 1979 |
| 13 | [CRIT France](https://www.tamtam.ai/c/crit-france) (crit-job.com)<br>A leading HR and recruitment agency with over 500 offices in France, Europe, and the US, providing staffing solutions to various industries worldwide | Staffing and Recruiting | 🇫🇷 Paris | 5,179 | 1962 |
| 14 | [SERIS Group](https://www.tamtam.ai/c/seris-group) (linktr.ee)<br>A family-owned security company established in 1958, offering a wide range of safety solutions globally, with a focus on human values and professional teams | Security and Investigations | 🇫🇷 Paris | 5,048 | 1958 |
| 15 | [Talan](https://www.tamtam.ai/c/talan) (talan.com)<br>Supports clients in end-to-end Data & AI transformation, combining management consulting with technological expertise for measurable and sustainable impact across vital sectors. | IT Services and IT Consulting | 🇫🇷 Paris | 4,659 |  |
| 16 | [ATALIAN PROPRETE](https://www.tamtam.ai/c/atalian-proprete)<br>A management consulting company located in Paris, France, specializing in facility management services and solutions for various industries and organizations | Business Consulting and Services | 🇫🇷 Paris | 4,000 |  |
| 17 | [Trescal](https://www.tamtam.ai/c/trescal) (trescal.com)<br>Provides precision calibration services, validation, qualification, repair, and metrology training across industries, geographies, and instrument types globally. | Commercial and Service Industry Machinery Manufacturing | 🇫🇷 Paris | 3,987 | 2004 |
| 18 | [Samsic Facility](https://www.tamtam.ai/c/samsic-facility) (samsic-facility.fr)<br>Offers integrated business services: cleaning, security, maintenance, reception, landscaping, and logistics to improve working environments and occupant well-being across diverse sectors. | Facilities Services | 🇫🇷 Paris | 3,978 | 1986 |
| 19 | [Onepoint](https://www.tamtam.ai/c/onepoint) (groupeonepoint.com)<br>Experts in data, design, and platforms, transforming companies and public administrations through strategic vision and operational implementation with cutting-edge technology and business skills | Business Consulting and Services | 🇫🇷 Paris | 3,835 |  |
| 20 | [Publicis Re:Sources](https://www.tamtam.ai/c/publicis-re-sources) (publicisresources.com)<br>Provides technology solutions and business services including finance, accounting, legal, and procurement for agencies, enabling innovation and client transformation. | Advertising Services | 🇫🇷 Paris | 3,796 |  |
| 21 | [Sia](https://www.tamtam.ai/c/sia) (sia-partners.com)<br>Next-generation global consulting group specializing in strategy, AI, and management, helping clients with transformation through data science and advanced GenAI solutions. | Business Consulting and Services | 🇫🇷 Paris | 3,646 | 1999 |
| 22 | [ADENES France](https://www.tamtam.ai/c/adenes-france) (adenes.eu)<br>Providing global, multi-specialist risk management and expert services before, during, and after incidents for businesses and individuals. | Insurance | 🇫🇷 Paris | 3,500 | 2009 |
| 23 | [ARMONIA](https://www.tamtam.ai/c/armonia) (armonia.team)<br>Designs, implements custom solutions for harmonious, human, effective workplaces; offers facility management, occupant services, maintenance, HR, reception, security, operated offices, cleaning, catering. | Business Consulting and Services | 🇫🇷 Paris | 3,407 |  |
| 24 | [Armatis](https://www.tamtam.ai/c/armatis) (armatis.com)<br>Specializing in outsourced Customer Relations since 1989, this French company has 11 sites in France and internationally, with 9000 experts prioritizing customer satisfaction | Outsourcing and Offshoring Consulting | 🇫🇷 Paris | 3,118 | 1989 |
| 25 | [Magellan](https://www.tamtam.ai/c/magellan) (magellangroup.eu)<br>Magellan Partners helps businesses succeed in their digital transformation by combining business expertise, technology knowledge, and digital creativity to open new digital paths | IT Services and IT Consulting | 🇫🇷 Paris | 2,794 |  |
| 26 | [Artefact](https://www.tamtam.ai/c/artefact) (artefact.com)<br>Consulting company focused on data and AI adoption, specializing in data transformation and marketing to drive business results across the value chain for global brands. | Business Consulting and Services | 🇫🇷 Paris | 2,572 | 2014 |
| 27 | [Freelance.com](https://www.tamtam.ai/c/freelance-com) (freelance.com)<br>Freelancecom connects organizations with top freelance experts and specialized digital SMEs to facilitate global transformation, bridging the gap between internal and external talents | Business Consulting and Services | 🇫🇷 Paris | 2,467 | 1991 |
| 28 | [GROUPE CITY ONE](https://www.tamtam.ai/c/groupe-city-one) (cityone.fr)<br>Provides reception and customer services for businesses, events, airports, and VIP lounges, focusing on operational expertise and customer experience across France and Europe. | Business Consulting and Services | 🇫🇷 Paris | 2,415 | 1991 |
| 29 | [Diot-Siaci](https://www.tamtam.ai/c/diot-siaci) (diot-siaci.com)<br>A leading multinational insurance brokerage group offering tailored solutions for businesses and professionals in Europe, Asia, Middle East, and Africa | Insurance | 🇫🇷 Paris | 2,244 | 2020 |
| 30 | [Free lance](https://www.tamtam.ai/c/free-lance) (befreetalent.fr)<br>Connecting freelance talent with IT service companies, large corporations, startups, and SMEs for big data, web development, and digital strategy roles. | IT Services and IT Consulting | 🇫🇷 Paris | 2,190 |  |

## 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 11, 2026.

## More company lists in Paris

- [The largest companies in Paris](https://www.tamtam.ai/l/largest-companies-paris) (22,790)
- [Multinational companies in Paris](https://www.tamtam.ai/l/multinational-companies-paris) (3,531)
- [SaaS companies in Paris](https://www.tamtam.ai/l/saas-companies-paris) (2,218)
- [IT Services and IT Consulting companies in Paris](https://www.tamtam.ai/l/it-services-and-it-consulting-companies-paris) (1,547)
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- [Retail chains in Paris](https://www.tamtam.ai/l/retail-chains-paris) (1,491)
- [Software Development companies in Paris](https://www.tamtam.ai/l/software-development-companies-paris) (1,413)
- [IT services companies in Paris](https://www.tamtam.ai/l/it-services-companies-paris) (1,386)
- [Financial services firms in Paris](https://www.tamtam.ai/l/financial-services-firms-paris) (1,361)
- [Business Consulting and Services companies in Paris](https://www.tamtam.ai/l/business-consulting-and-services-companies-paris) (1,360)
- [Law Practice companies in Paris](https://www.tamtam.ai/l/law-practice-companies-paris) (1,289)
- [Companies with in-house R&D in Paris](https://www.tamtam.ai/l/r-and-d-companies-paris) (1,249)
- [Subscription businesses in Paris](https://www.tamtam.ai/l/subscription-businesses-paris) (1,004)
- [Financial Services companies in Paris](https://www.tamtam.ai/l/financial-services-companies-paris) (999)
- [Advertising Services companies in Paris](https://www.tamtam.ai/l/advertising-services-companies-paris) (832)
- [Marketing and communications agencies in Paris](https://www.tamtam.ai/l/marketing-agencies-paris) (812)
- [Education providers in Paris](https://www.tamtam.ai/l/education-companies-paris) (812)
- [Technology, Information and Internet companies in Paris](https://www.tamtam.ai/l/technology-information-and-internet-companies-paris) (807)
- [Companies with a mobile app in Paris](https://www.tamtam.ai/l/companies-with-mobile-app-paris) (764)
- [AI companies in Paris](https://www.tamtam.ai/l/ai-companies-paris) (743)
- [Recruitment and staffing agencies in Paris](https://www.tamtam.ai/l/recruitment-agencies-paris) (727)
- [Luxury brands in Paris](https://www.tamtam.ai/l/luxury-brands-paris) (713)
- [Real Estate companies in Paris](https://www.tamtam.ai/l/real-estate-companies-paris) (627)
- [AI-native companies in Paris](https://www.tamtam.ai/l/ai-native-companies-paris) (619)

## The same list elsewhere in France

- [Professional services firms in France](https://www.tamtam.ai/l/professional-services-firms-france) (6,611)
- [Professional services firms in Île-de-France](https://www.tamtam.ai/l/professional-services-firms-ile-de-france) (3,377)
- [Professional services firms in Auvergne-Rhône-Alpes](https://www.tamtam.ai/l/professional-services-firms-auvergne-rhone-alpes) (711)
- [Professional services firms in the Hauts-de-Seine department](https://www.tamtam.ai/l/professional-services-firms-hauts-de-seine) (629)
- [Professional services firms in Provence-Alpes-Côte d'Azur](https://www.tamtam.ai/l/professional-services-firms-provence-alpes-cote-dazur) (433)
- [Professional services firms in the Rhône department](https://www.tamtam.ai/l/professional-services-firms-rhone) (400)
- [Professional services firms in Occitanie](https://www.tamtam.ai/l/professional-services-firms-occitanie) (399)
- [Professional services firms in Grand Est](https://www.tamtam.ai/l/professional-services-firms-grand-est) (316)
- [Professional services firms in Nouvelle-Aquitaine](https://www.tamtam.ai/l/professional-services-firms-nouvelle-aquitaine) (308)
- [Professional services firms in Hauts-de-France](https://www.tamtam.ai/l/professional-services-firms-hauts-de-france) (260)
- [Professional services firms in Pays de la Loire](https://www.tamtam.ai/l/professional-services-firms-pays-de-la-loire) (254)
- [Professional services firms in the Bouches-du-Rhône department](https://www.tamtam.ai/l/professional-services-firms-bouches-du-rhone) (249)
- [Professional services firms in the Haute-Garonne department](https://www.tamtam.ai/l/professional-services-firms-haute-garonne) (208)
- [Professional services firms in the Nord department](https://www.tamtam.ai/l/professional-services-firms-nord) (178)
- [Professional services firms in Brittany](https://www.tamtam.ai/l/professional-services-firms-brittany) (167)
- [Professional services firms in the Loire-Atlantique department](https://www.tamtam.ai/l/professional-services-firms-loire-atlantique) (158)
- [Professional services firms in the Gironde department](https://www.tamtam.ai/l/professional-services-firms-gironde) (151)
- [Professional services firms in Normandy](https://www.tamtam.ai/l/professional-services-firms-normandy) (114)
- [Professional services firms in the Yvelines department](https://www.tamtam.ai/l/professional-services-firms-yvelines) (108)
- [Professional services firms in the Ille-et-Vilaine department](https://www.tamtam.ai/l/professional-services-firms-ille-et-vilaine) (94)
- [Professional services firms in Lyon](https://www.tamtam.ai/l/professional-services-firms-lyon) (265)
- [Professional services firms in Toulouse](https://www.tamtam.ai/l/professional-services-firms-toulouse) (139)
- [Professional services firms in Marseille](https://www.tamtam.ai/l/professional-services-firms-marseille) (123)
- [Professional services firms in Boulogne-Billancourt](https://www.tamtam.ai/l/professional-services-firms-boulogne-billancourt) (102)

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Source: https://www.tamtam.ai/l/professional-services-firms-paris