This selection of large companies in Paris primarily consists of IT services and consulting firms, alongside specialized cybersecurity providers. Among them are Capgemini, which delivers end-to-end services across strategy, technology, design, engineering, and business operations, and Sopra Steria, assisting large organizations with digital transformation. Exclusive Networks is a global cybersecurity specialist, while IN Groupe provides identity solutions and secure digital services. Ledger develops products for securely managing crypto assets, and YesWeHack operates a Bug Bounty and Vulnerability Management Platform.
A notable pattern among these companies is their strong focus on digital transformation, IT consulting, and cybersecurity. Many of the larger firms, such as Capgemini and Sopra Steria, offer broad IT services, while others like Exclusive Networks, OWN.Security, and YesWeHack are pure players in the cybersecurity domain. This indicates a concentration of expertise in safeguarding digital infrastructures and facilitating technological evolution within the Parisian business landscape.
| # | Company | Employees | |||
|---|---|---|---|---|---|
| 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 |
342,989 | |||
| 2 |
Sopra Steriasoprasteria.com
Offers consulting, digital services, and solutions, assisting large companies and organizations with digital transformation, improving competitiveness through technology and collaboration. |
47,609 | |||
| 3 |
SFR Businesssfrbusiness.fr
Provides innovative services supporting company growth and digital transformation. Offers high-performance fixed and mobile connectivity and ICT solutions to businesses and public administrations. |
3,520 | |||
| 4 |
Exclusive Networksexclusive-networks.com
Global cybersecurity specialist driving transition to a trusted digital future, offering distribution services with innovative technologies, business models, and worldwide reach |
3,021 | |||
| 5 |
IN Groupeingroupe.com
Provides identity solutions, secure digital services integrating electronics and biometrics for states, citizens, and businesses, ensuring digital sovereignty. |
1,852 | |||
| 6 |
HeadMind Partnersheadmind.com
Advises major companies on cybersecurity, digital projects, and Artificial Intelligence, with expertise in digital risks. |
1,500 | |||
| 7 |
RSM Francersm.global
International network providing audit, accounting, and consulting services through eighteen regional locations with over thirteen hundred employees and ninety partners delivering tailored solutions. |
1,398 | |||
| 8 |
Marlinkmarlink.com
Designs, builds, and manages hybrid network solutions, combining satellite, terrestrial, and digital services to optimize remote business operations with digital technologies. |
1,127 | |||
| 9 |
OWN.Securityown.security
Pure player in cybersecurity, offering auditing, consulting, threat intelligence, incident response, and managed SOC services to organizations of all sizes. |
947 | |||
| 10 |
ANSSI - Agence nationale de la sécurité des systèmes d'informationcyber.gouv.fr
National authority for cybersecurity and cyber defense, protecting the nation from cyberattacks by defending critical systems, sharing knowledge, and regulating cybersecurity. |
867 | |||
| 11 |
SQUAD - Cabinet de conseils et dexpertisessquadgroup.com
Offers cybersecurity consulting and expert services, adapting to evolving IT practices like cloud computing and DevOps for major companies. |
803 | |||
| 12 |
Ledgerledger.com
Develops products and services for individuals and companies to securely buy, store, swap, grow, and manage crypto assets, including hardware wallets. |
796 | |||
| 13 |
Claranet Franceclaranet.com
Leading European provider of managed hosting, network, and communication services, serving thousands of businesses across multiple countries and data centers. |
750 | |||
| 14 |
QESTIT Groupqestit.com
Specializing in software testing and quality assurance for high demand industries in Europe, with 900+ employees across 7 countries Transforming good software into perfect solutions |
749 | |||
| 15 |
YesWeHackyeswehack.com
Bug Bounty and Vulnerability Management Platform connecting organizations with ethical hackers for website, app, and infrastructure security, with ISO certifications |
744 | |||
Want more companies than this list?This page shows the largest ones only. Connect to Tamtam to see every company that matches, filter by size, industry or growth, and reach their decision-makers. | |||||
| 16 |
NEVERHACKneverhack.com
Provides innovative and ethical cybersecurity solutions, supporting businesses and individuals in protecting their data through consulting, training, risk assessment, and AI-driven innovations. |
672 | |||
| 17 |
Advensadvens.com
Leading cybersecurity firm protecting organizations 24/7 from cyber attackers, supporting impact projects through an endowment fund. |
652 | |||
| 18 |
Forward Globalforwardglobal.com
Anticipating managing risks, addressing crises conflicts. Delivering services solutions integrating human expertise with technology for diverse risks. |
486 | |||
| 19 |
Oodriveoodrive.com
Provides transparent tools for businesses to collaborate, communicate, and streamline operations, ensuring security, sovereignty, and compliance for users. |
385 | |||
| 20 |
Sewan Groupesewan.fr
Cloud operator and host providing essential communication services to businesses, with a national network of over 1000 partners serving 75,000 companies and 2000 mid-sized enterprises |
384 | |||
| 21 |
SYNETISsynetis.com
Leading French cybersecurity consulting firm, assisting companies with information systems security, offering audits, GRC, digital identity, operational security, and training. |
351 | |||
| 22 |
IMPRIMERIE NATIONALE S.A.ingroupe.com
Provides secure identity solutions including electronic components, biometrics integration, polycarbonate cards, digital services, and complex printing for governments and businesses worldwide. |
328 | |||
| 23 |
EvaBssievabssi.com
International consulting firm specializing in cybersecurity and information system performance, helping clients manage cyber risks and build innovative, efficient IS. |
310 | |||
| 24 |
Cyllenegroupe-cyllene.com
Provides digital transformation through consulting, architecture, hosting, cybersecurity, application deployment, and data intelligence, emphasizing human expertise in technology solutions. |
295 | |||
| 25 |
WALLIX Groupwallix.com
A European cybersecurity specialist providing digital identity and access security solutions to enable business continuity, regulatory compliance, and ethical digital transformation |
277 | |||
| 26 |
Yousignyoutrust.com
Yousign offers a reliable e-signature solution for companies in Europe, focusing on compliance, accessibility, and positive environmental impact. |
247 | |||
| 27 |
CEISforwardglobal.com
Designs and delivers services and technologies focused on managing digital, economic, and information risks for businesses and organizations. |
238 | |||
| 28 |
Beijaflorejoin.headmind.com
An international operational consulting firm specializing in digital strategy, with offices in multiple cities, helping organizations build and enhance their digital strategies |
223 | |||
| 29 | 
Mind Technologiesmind-techno.fr
Specializing in securing IP infrastructures for over two decades through a comprehensive and uncompromising approach, ensuring continuous control and alignment of mindsets |
201 | |||
| 30 |
ReeVo Cloud & Cybersécuritéreevo.fr
Provides integrated cloud and cybersecurity services, protecting and safeguarding company data assets within secure digital strongboxes, adhering to high standards. |
200 | |||
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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.
More company lists in Paris
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- Multinational companies in Paris 3,531
- Professional services firms in Paris 2,241
- SaaS companies in Paris 2,218
- IT Services and IT Consulting companies in Paris 1,547
- Consulting firms in Paris 1,532
- Retail chains in Paris 1,491
- Software Development companies in Paris 1,413
- IT services companies in Paris 1,386
- Financial services firms in Paris 1,361
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- Law Practice companies in Paris 1,289
- Companies with in-house R&D in Paris 1,249
- Subscription businesses in Paris 1,004
- Financial Services companies in Paris 999
- Advertising Services companies in Paris 832
- Marketing and communications agencies in Paris 812
- Education providers in Paris 812
- Technology, Information and Internet companies in Paris 807
- Companies with a mobile app in Paris 764
- AI companies in Paris 743
- Recruitment and staffing agencies in Paris 727
- Luxury brands in Paris 713
- Real Estate companies in Paris 627
The same list elsewhere in France
- Cybersecurity companies in France 958
- Cybersecurity companies in Île-de-France 525
- Cybersecurity companies in the Hauts-de-Seine department 154
- Cybersecurity companies in Auvergne-Rhône-Alpes 91
- Cybersecurity companies in Occitanie 49
- Cybersecurity companies in Provence-Alpes-Côte d'Azur 48
- Cybersecurity companies in the Rhône department 48
- Cybersecurity companies in Hauts-de-France 44
- Cybersecurity companies in Grand Est 40
- Cybersecurity companies in Brittany 37
- Cybersecurity companies in the Bouches-du-Rhône department 36
- Cybersecurity companies in Nouvelle-Aquitaine 35
- Cybersecurity companies in the Nord department 30
- Cybersecurity companies in Pays de la Loire 28
- Cybersecurity companies in the Haute-Garonne department 27
- Cybersecurity companies in the Ille-et-Vilaine department 25
- Cybersecurity companies in the Yvelines department 25