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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.

馃嚝馃嚪 Paris30 companiesUpdated Nov 11, 2026

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.

#CompanyIndustryHeadquarters EmployeesFounded
1
Capgeminicapgemini.com

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 馃嚝馃嚪 Paris 342,989 n/a
2
Bureau Veritasbureauveritas.com

A global leader in testing, inspection, and certification services, fostering confidence through expertise and independence while addressing crucial societal and environmental challenges

Environmental Services 馃嚝馃嚪 Paris 55,072 1828
3
Sopra Steriasoprasteria.com

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 馃嚝馃嚪 Paris 47,609 n/a
4
Capgemini Engineeringcapgemini.com

Engineering R&D services, combining broad industry knowledge and cutting-edge digital and software technologies to accelerate clients' journey towards Intelligent Industry.

Engineering Services 馃嚝馃嚪 Paris 44,836 n/a
5
Publicis Groupepublicisgroupe.com

Helps clients transform their marketing and digital businesses, providing expertise in communications, media, data, and technology across 100+ countries.

Advertising Services 馃嚝馃嚪 Paris 41,020 n/a
6
Webhelpwebhelp.com

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 馃嚝馃嚪 Paris 27,162 n/a
7
Technip Energiesten.com

Leading energy engineering & technology company focused on LNG, hydrogen, ethylene, sustainable chemistry, and CO2 management Committed to accelerating the energy transition globally

Engineering Services 馃嚝馃嚪 Paris 18,645 n/a
8
Capgemini Inventcapgemini.com

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 馃嚝馃嚪 Paris 17,000 n/a
9
ADMRadmr.org

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 馃嚝馃嚪 Paris 11,291 1945
10
SYSTRAsystra.com

Leading engineering and consultancy group specializing in public transport and mobility solutions, connecting people and regions through transport infrastructure development.

Engineering Services 馃嚝馃嚪 Paris 10,162 n/a
11
Cerfrancecerfrance.fr

Provides comprehensive accounting and consulting services across France. Supports businesses and individuals in various sectors with management, administrative, and legal aspects.

Accounting 馃嚝馃嚪 Paris 5,502 1957
12
Groupe SIIsii-group.com

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 馃嚝馃嚪 Paris 5,287 1979
13
CRIT Francecrit-job.com

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 馃嚝馃嚪 Paris 5,179 1962
14
SERIS Grouplinktr.ee

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 馃嚝馃嚪 Paris 5,048 1958
15
Talantalan.com

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 馃嚝馃嚪 Paris 4,659 n/a

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16
ATALIAN PROPRETE

A management consulting company located in Paris, France, specializing in facility management services and solutions for various industries and organizations

Business Consulting and Services 馃嚝馃嚪 Paris 4,000 n/a
17
Trescaltrescal.com

Provides precision calibration services, validation, qualification, repair, and metrology training across industries, geographies, and instrument types globally.

Commercial and Service Industry Machinery Manufacturing 馃嚝馃嚪 Paris 3,987 2004
18
Samsic Facilitysamsic-facility.fr

Offers integrated business services: cleaning, security, maintenance, reception, landscaping, and logistics to improve working environments and occupant well-being across diverse sectors.

Facilities Services 馃嚝馃嚪 Paris 3,978 1986
19
Onepointgroupeonepoint.com

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 馃嚝馃嚪 Paris 3,835 n/a
20
Publicis Re:Sourcespublicisresources.com

Provides technology solutions and business services including finance, accounting, legal, and procurement for agencies, enabling innovation and client transformation.

Advertising Services 馃嚝馃嚪 Paris 3,796 n/a
21
Siasia-partners.com

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 馃嚝馃嚪 Paris 3,646 1999
22
ADENES Franceadenes.eu

Providing global, multi-specialist risk management and expert services before, during, and after incidents for businesses and individuals.

Insurance 馃嚝馃嚪 Paris 3,500 2009
23
ARMONIAarmonia.team

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 馃嚝馃嚪 Paris 3,407 n/a
24
Armatisarmatis.com

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 馃嚝馃嚪 Paris 3,118 1989
25
Magellanmagellangroup.eu

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 馃嚝馃嚪 Paris 2,794 n/a
26
Artefactartefact.com

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 馃嚝馃嚪 Paris 2,572 2014
27
Freelance.comfreelance.com

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 馃嚝馃嚪 Paris 2,467 1991
28
GROUPE CITY ONEcityone.fr

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 馃嚝馃嚪 Paris 2,415 1991
29
Diot-Siacidiot-siaci.com

A leading multinational insurance brokerage group offering tailored solutions for businesses and professionals in Europe, Asia, Middle East, and Africa

Insurance 馃嚝馃嚪 Paris 2,244 2020
30
Free lancebefreetalent.fr

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 馃嚝馃嚪 Paris 2,190 n/a

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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.

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