This selection of professional services firms in Neuilly-sur-Seine includes large consulting and IT services companies. Altran, now Capgemini Engineering, provides engineering services, while PwC France offers consulting, audit, legal, and tax expertise. Scalian focuses on digital transformation and operations performance, and Grant-Thornton France provides audit and financial advisory services.
Several companies specialize in IT services and digital transformation, such as Infotel, SFEIR, and AMEXIO. The list also features a law firm, CMS Francis Lefebvre Avocats, which offers international legal and tax advisory services. Many of these firms were founded between the mid-1980s and the late 2000s, indicating a period of growth in the professional services sector.
| # | Company | Employees | |||
|---|---|---|---|---|---|
| 1 |
Altrancapgemini-engineering.com
Altran, now Capgemini Engineering, offers engineering services Follow them on LinkedIn for updates and insights |
11,652 | |||
| 2 |
Vulcain Engineering Groupvulcain-eng.com
Provides engineering consulting and project solutions for energy and environmental sectors, delivering technical assistance, expertise, and project management globally. |
5,234 | |||
| 3 |
PwC Francepwc.fr
Offers consulting, audit, legal, and tax expertise, blending technology with multidisciplinary knowledge to accelerate sustainable business transformation for organizations. |
4,109 | |||
| 4 |
Scalianscalian.com
A global company founded in 1989 with 3 business lines focusing on Digital Transformation, Digital Systems, and Operations Performance across various countries |
4,098 | |||
| 5 |
Grant-Thornton Francegrantthornton.fr
Provides audit, financial advisory, operational consulting, legal and tax advice, and sustainable transformation services to French businesses. |
2,342 | |||
| 6 |
Infotelinfotel.com
Provides IT and digital transformation consulting for large enterprises, focusing on strategic design, technological expertise, and agile development, from conception to implementation. |
1,894 | |||
| 7 | 1,083 | ||||
| 8 |
CMS Francis Lefebvre Avocatscms.law
Provides specialized international legal and tax advisory services covering corporate, employment, and commercial law for major global corporations across diverse industrial sectors. |
958 | |||
| 9 |
ACT-ON GROUPactongroup.com
Consulting and services company specializing in human resources, data, and technology to support organizational, digital, and cultural transformation projects. |
593 | |||
| 10 |
Herv茅 Schauer Consultants (HSC)hs2.fr
Provides information security consulting, audits, penetration tests, risk management, and training services to secure diverse infrastructures and systems. |
500 | |||
| 11 |
AMEXIOamexiogroup.com
Digital transformation partner specializing in Enterprise Content Management, Customer Communication Management, and Customer Experience Management, prioritizing human excellence for successful outcomes |
477 | |||
| 12 |
RAINBOW PARTNERS GROUPrainbowpartners.com
Multispecialist consulting group with global presence, offering expertise in finance, industry, data, AI, blockchain, cybersecurity, and digital transformation for large clients. |
445 | |||
| 13 |
QUANTEAM (RAINBOW PARTNERS Group)quanteam.fr
Supports corporate clients across the Front-to-Back chain, in evolving their business activities and transformation projects, with business and IT competence. |
368 | |||
| 14 |
SMRsmr-bc.com
Specialized consulting firm providing qualified talent, recruitment assistance services, and consultant placements |
368 | |||
| 15 |
SOFIPsofip-sa.fr
Commercial strategy development, brand promotion management, and consumer engagement services for pharmaceutical, parapharmaceutical, and cosmetic industries to optimize product distribution and sales growth. |
330 | |||
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| 16 |
INFOGENEinfogene.fr
Specializes in digital solutions, business intelligence, and engineering services, including R&D support, software selection, and application maintenance for various industries. |
327 | |||
| 17 |
APGARapgar-group.com
Provides global consultancy and managed services in data management and AI, supporting diverse industries with sustainable, innovative solutions. |
278 | |||
| 18 |
TechSelltechsell.fr
Specializes in recruiting, training, and managing sales teams to enhance brand presence and shopper experience across France retail environments. |
261 | |||
| 19 |
GroupeVital-Francegroupe-vital.com
The French independent IT consultancy group specializes in user support, IT production, and services spanning from Mainframe to Cloud environments nationwide |
243 | |||
| 20 |
Gravitaslinedata.com
A company specializing in financial software solutions, recently acquired by Linedata Visit Linedata on Linkedin or their website for updates |
184 | |||
| 21 |
Pharmafield Groupepharmafield.fr
Comprehensive services optimizing healthcare industry performance through medical promotion, sales networks, outsourcing solutions, administrative management, and strategic product environment analysis. |
164 | |||
| 22 |
Olifan Groupolifangroup.com
French leader in wealth management, helping individuals and leaders structure, optimize, and transfer assets. Supports with retirement, vulnerability, and investment strategies. |
158 | |||
| 23 |
LVMH Client Services
remote client relationship management, service incubator, center of expertise, strategic consulting, digital innovation, client service transformation |
145 | |||
| 24 |
PwC Consulting - People & Organizationpwc.fr
Specializing in consulting and audit services, the company focuses on human-centered transformation projects, integrating operational performance with human development for successful business outcomes |
145 | |||
| 25 |
PRICEWATERHOUSECOOPERS ADVISORYpwc.com
An innovative community offering solutions through human ingenuity, technology, and products to enhance trust and achieve lasting results for organizations |
136 | |||
| 26 |
KYC Consultingkyc-consulting.com
Management consulting firm specializing in delivering projects for financial institutions, with a team of experienced consultants offering high-quality services and added value in a constantly changing environment |
134 | |||
| 27 |
Openvalueopenvalue.co
Openvalue is a consulting and integration firm specializing in Data & Artificial Intelligence, offering services in Machine Learning, NLP, UX design, and application development |
133 | |||
| 28 |
CARBON ITcarbon-it.fr
Consulting and IT expertise in Artificial Intelligence and Software Engineering. Structuring and industrializing digital ambitions combining technical excellence, methodological rigor, and business value creation. |
121 | |||
| 29 |
BOCASAYbocasay.com
Develops web and application solutions, offering dedicated teams and fixed-price projects for digital needs, specializing in design, development, maintenance, and training. |
110 | |||
| 30 |
Pharmasyspharmasys.fr
A consultant company specializing in customized services for healthcare industry, focusing on Engineering, Quality, Data Integrity, and GxP Compliance Offering expertise in regulatory compliance and system validation |
90 | |||
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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 13, 2026.
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