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30 leading professional services firms in Lille

Tamtam tracks 54 professional services firms headquartered in Lille. This list ranks the 30 largest by number of employees on LinkedIn, led by BGE Hauts de France, ACALY Conseil en Ingénierie and Diligentia | Audit • Conseil • Expertise. Their median headcount is 30. Half of them were founded in 2011 or later.

🇫🇷 Lille30 companiesUpdated Nov 11, 2026

The professional services firms in Lille listed here include a mix of established companies and younger businesses. Among the larger firms, BGE Hauts de France supports entrepreneurs with training and financing, while ACALY Conseil en Ingénierie offers technical and organizational consulting. Diligentia provides accounting and auditing services, and Citéo Médiation focuses on mediation and facilitation for societal change. Vacherand Immobilier is a family-owned real estate company.

The data shows a concentration of companies founded between 2010 and 2018, indicating a period of growth for new professional services ventures in Lille. Many of these newer firms specialize in digital transformation, IT services, and software development, such as Les-Tilleuls.coop, which designs web and mobile projects using open-source software.

#CompanyIndustryHeadquarters EmployeesFounded
1
BGE Hauts de Francebge-hautsdefrance.fr

Support entrepreneurs with project preparation, training, financing, networking, and local expertise to increase chances of business success.

Professional Training and Coaching 🇫🇷 Lille 228 1979
2
ACALY Conseil en Ingénierieacaly.eu

The company provides technical and organizational consulting services, offers work packages for project outsourcing, and focuses on research and innovation for clients' success

Business Consulting and Services 🇫🇷 Lille 183 2015
3
Diligentia | Audit • Conseil • Expertisediligentia.fr

An accounting and auditing firm in Northern France offering personalized support in accounting, taxation, legal, and social matters for businesses and professionals

Accounting 🇫🇷 Lille 133 n/a
4
Citéo Médiationciteo.org

Mediation and facilitation agency assisting businesses, communities, and citizens in navigating societal change through tailored guidance promoting understanding, participation, and sustainable collective action

Civic and Social Organizations 🇫🇷 Lille 125 1998
5
Vacherand Immobiliervacherand.fr

A family-owned company in the real estate sector since 1997, offering a range of services including property management, real estate transactions, and asset management

Real Estate 🇫🇷 Lille 125 1997
6
Les-Tilleuls.cooples-tilleuls.coop

Design and development of innovative web and mobile projects using open-source software, with democratic cooperative governance and profit sharing.

Software Development 🇫🇷 Lille 74 2011
7
OTTEOotteo.fr

A consulting and engineering company offering services in product development, recruitment assistance, and professional training across various sectors Contact for more information

Business Consulting and Services 🇫🇷 Lille 57 2010
8
Crowe COGEFIS - Groupe Fideliancecrowe.com

COGEFIS is an independent accounting and auditing firm, part of the global network CROWE, providing specialized services to various organizations

Accounting 🇫🇷 Lille 42 1978
9
GenoScreengenoscreen.fr

Innovative genomics company providing tailored solutions in healthcare, agronomy, skincare, etc through DNA analysis, sequencing, consultation, and training services

Biotechnology Research 🇫🇷 Lille 39 2001
10
ICSISicsis.fr

An innovative digital company specializing in digital transformation projects, offering a wide range of services such as app development, BI, and project management assistance

IT Services and IT Consulting 🇫🇷 Lille 37 2013
11
BeWebewe.eu

A service company specializing in guiding organizations through digital transformation with expertise in collaboration solutions, business consulting, technology integration, change management, and user adoption

IT Services and IT Consulting 🇫🇷 Lille 36 2013
12
ORSEU ETHIXorseu-ethix.fr

Provide expertise and support to CSE representatives for economic understanding, negotiation, social policy improvement, and adapting to legislative changes.

Legal Services 🇫🇷 Lille 34 1992
13
OZEO Consultingozeo-consulting.fr

OZEO Consulting is a young digital service company focusing on differentiated intellectual services with strong human values and excellence

IT Services and IT Consulting 🇫🇷 Lille 32 n/a
14
ZeTracezetrace.com

A leading consultancy specializing in digital commerce transformation and sustainability for medium to large B2C and B2B organizations, offering expertise and recruitment services

Technology, Information and Internet 🇫🇷 Lille 31 2018
15
Dalt - Digital alternativedalt.fr

Custom web development, UX/UI design, digital marketing, and AI integration for businesses, delivering high-performance websites and scalable digital solutions focused on profitability.

Technology, Information and Internet 🇫🇷 Lille 30 2008

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16
WINGEST AUDIT & EXPERTISE

WINGEST AUDIT & EXPERTISE is a certified accounting firm with offices in Epinay sur Seine and Lille, offering expert services

Accounting 🇫🇷 Lille 27 2015
17
ADHOCbilan-de-competences-lille.fr

Specialists in career guidance, offering personalized support for individuals seeking reorientation through skills assessment and personalized coaching by a team of psychologists and HR consultants

Human Resources Services 🇫🇷 Lille 26 1999
18
L’Échappée Bièreevent.echappee-biere.com

A tourism and event agency specializing in beer, offering unique experiences, tours, and events focused on discovering the French and international beer culture

Events Services 🇫🇷 Lille 26 2013
19
ALTUS CONSEILS - GROUPE AFIGECafigec.com

An accounting firm located in Lille, France, providing financial advisory services and solutions to businesses in the region

Business Consulting and Services 🇫🇷 Lille 25 2004
20
VIVALDI Avocatsvivaldi-avocats.com

A multi-bar law firm based in Paris and Lille specializing in Business Law with a team of 18 lawyers and legal experts They offer comprehensive legal services to a loyal clientele

Law Practice 🇫🇷 Lille 25 2001
21
French Payroll Services secrétariat socialfrenchpayrollservices.fr

Providing payroll services and legal advice for labor matters in France, including training Specializing in assisting international companies with French development and payroll

Business Consulting and Services 🇫🇷 Lille 25 n/a
22
Meedzmeedz.io

Meedz specializes in creating innovative digital tools to enhance client performance and competitiveness They excel in development, Devops, and data solutions

IT Services and IT Consulting 🇫🇷 Lille 24 2021
23
LUPISElupise.fr

The company specializes in securing organizations through cybersecurity services such as audits, training, project management, crisis management support, and secure development

IT Services and IT Consulting 🇫🇷 Lille 22 n/a
24
Talositalosi.com

Talosi is a new generation IT consulting company focused on personalized and transparent services, where employees feel at home They embrace a geek culture

IT Services and IT Consulting 🇫🇷 Lille 21 2021
25
IBM SERVICES CENTER FRANCE

An IT services company in Lille, France, providing technology solutions and services to clients in the region and beyond

IT Services and IT Consulting 🇫🇷 Lille 21 n/a
26
Data-IT - Groupe IT & You ©️data-it.fr

Data-IT is a high-end IT services company specialized in office and computer technologies, offering expertise and technical skills to develop and maintain clients' information systems

Computer and Network Security 🇫🇷 Lille 20 2014
27
Solenersolener.fr

Solener is a sustainable building consultancy with over 30 years of experience, focusing on energy efficiency, environmental optimization, and innovative solutions

Construction 🇫🇷 Lille 17 1988
28
QUINTUOR

Specializing in business law, providing expert advice, guidance, and defense of corporate interests

Law Practice 🇫🇷 Lille 15 2014
29
SKILLXskillx.fr

A technology company from Hauts-de-France specializing in cybersecurity and cloud services to accelerate clients' IT transition, with a liberated and trust-based approach

Computer and Network Security 🇫🇷 Lille 13 2018
30
Sapiologiesapiologie.com

A sustainability consulting firm offering life cycle analysis to measure environmental, social, and ethical impacts, providing recommendations for sustainable practices

Environmental Services 🇫🇷 Lille 12 2021

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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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