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30 leading consulting firms in the Bouches-du-Rhône department

Tamtam tracks 129 consulting firms headquartered in the Bouches-du-Rhône department. This list ranks the 30 largest by number of employees on LinkedIn, led by Sonovision - Ortec Group, Klanik and Key Performance Consulting (KPC). Their median headcount is 143. Half of them were founded in 2009 or later. The most common headquarters are Aix-en-Provence (12), Marseille (12) and Venelles (2).

🇫🇷 Bouches-du-Rhône30 companiesUpdated Nov 12, 2026

These are the largest consulting firms in Bouches-du-Rhône. Many are IT services and IT consulting firms, such as Klanik, which assists with digital projects, and Key Performance Consulting, which offers technology consulting. Other firms include setec international, specializing in transport infrastructure, and ECP - Project Management .INtelligence, focused on project management for industrial sectors. The firms listed are mostly mid-sized companies.

The companies are clustered in a few cities. Aix-en-Provence is home to Sonovision - Ortec Group, Key Performance Consulting, ECP, and ARKADIA Group. Marseille also has a significant presence with Klanik, iQanto, and Seres Technologies. The data shows a strong concentration of companies founded in the late 2000s and early 2010s, indicating a period of growth for the consulting sector in the region.

#CompanyIndustryHeadquarters EmployeesFounded
1
Sonovision - Ortec Groupsonovisiongroup.com

Experts process complex systems content, enriching products with innovative solutions throughout their lifecycle, from design to technical content and training for optimized field operations.

Engineering Services 🇫🇷 Aix-en-Provence 568 n/a
2
Klanikklanik.com

Provides IT engineering consulting, assisting partners with digital and technological projects, leveraging expert talent across various technological verticals globally for digital transformation.

IT Services and IT Consulting 🇫🇷 Marseille 548 2011
3
Key Performance Consulting (KPC)keyperformance-consulting.com

Global player in upstream and integration phases for systems, offering technology consulting and services for large project integration and business process improvement.

IT Services and IT Consulting 🇫🇷 Aix-en-Provence 474 2010
4
setec internationalinter.setec.fr

Engineering consultancy specializing in transport infrastructure projects including feasibility, design, environmental studies, and project management across France and internationally.

Civil Engineering 🇫🇷 Vitrolles 446 n/a
5
iQantoiqanto.net

Industrial transformation through automation, robotics, AI, and cybersecurity to improve processes and deploy intelligent systems across diverse sectors for small and large enterprises.

IT Services and IT Consulting 🇫🇷 Marseille 349 n/a
6
ECP - Project Management .INtelligenceassystem.com

Project Management Consulting Group specializing in Oil & Gas, Nuclear, Energy, Defense, Infrastructures, Chemistry, Metallurgy sectors Services include project management, cost estimation, risk management, and more

Business Consulting and Services 🇫🇷 Aix-en-Provence 287 n/a
7
Altereoaltereo.fr

An independent French company driving clients from ideas to behaviors, specializing in water engineering, public utility management, city sustainability, and geographic intelligence solutions

Environmental Services 🇫🇷 Venelles 229 1989
8
Seres Technologiesseres-technologies.com

Specializes in risk management, complex systems design, and R&D, supporting industries like mobility, defense, and energy with comprehensive safety and security solutions.

Business Consulting and Services 🇫🇷 Marseille 220 2009
9
ARKADIA Grouparkadiagroup.fr

ARKADIA Group is an independent engineering and services firm specializing in Energy and Aerospace/Transport sectors, offering expertise in large industrial projects worldwide

Business Consulting and Services 🇫🇷 Aix-en-Provence 214 2010
10
IMPAC Ingénierie (MPA Group)impac-ingenierie.com

Engineering consulting firm supporting major industrial sectors with project lifecycle guidance, local presence, and expert teams across France.

Engineering Services 🇫🇷 Grans 183 1988
11
ADNOVadnov.fr

ADNOV, part of ADSN Group, specializes in providing innovative solutions for notaries including secure networks, data protection, cybersecurity, real estate, and client relations

IT Services and IT Consulting 🇫🇷 Venelles 171 2018
12
Ekstend Grouplokall.com

Independent marketing group supporting brand transformation and strategy deployment with expertise in digital, branding, media, innovation, and event services.

Advertising Services 🇫🇷 Marseille 167 n/a
13
REACTIS Groupreactis.fr

Company helps businesses with IT projects, software development, systems maintenance, digital transformation, and application services through various flexible intervention modes.

IT Services and IT Consulting 🇫🇷 Aix-en-Provence 163 2001
14
JLB Expertisesjlbexpertises.com

A French survey company specializing in agricultural and food products in West Africa, with expertise in cocoa, coffee, rice, and cargo surveys

Maritime Transportation 🇫🇷 Marseille 153 1883
15
Sonergiasonergia.fr

Located in Marseille since 2009, this company supports energy suppliers in meeting government-set energy reduction goals through energy efficiency renovations for consumers

Environmental Services 🇫🇷 Marseille 143 2009

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16
ARIAL Industriesarial-industries.com

ARIAL Industries is an engineering company specializing in mechanical, electrical/electronic, and embedded systems for clients in aerospace, nuclear, automotive, and space industries

Engineering Services 🇫🇷 Aix-en-Provence 141 2001
17
Team-iTteam-it.fr

Specialized in IT infrastructure, cybersecurity, DevOps, cloud, project management, and ITIL process management for large corporate clients.

IT Services and IT Consulting 🇫🇷 Aix-en-Provence 135 2014
18
C2C CONSEILSc2c-conseils.com

Groupe C2C AUDIT is a multi-generational team of accounting experts with diverse skills, experience, human qualities, and technological proficiency

Accounting 🇫🇷 Marseille 124 2004
19
Reel IT Groupereelit.fr

REEL IT Group, founded by digital transformation experts, offers a diverse range of solutions to drive businesses forward through digital transformation

Computer Networking Products 🇫🇷 Aix-en-Provence 120 2019
20
Amesys Conseilamesys-conseil.fr

Consulting and industrial group specializing in Defense & aerospace, aeronautics, transportation, RF, and homeland security markets with consistent growth and profitability

IT Services and IT Consulting 🇫🇷 Aix-en-Provence 118 1979
21
PRINCIPIAprincipia-group.com

PRINCIPIA provides top-class engineering services, specializing in sustainable development and offering innovative, cost-effective solutions for large EPCI projects since 1981

Engineering Services 🇫🇷 La Ciotat 114 1981
22
Dev-iddev-id.fr

It is a network of digital makers specializing in creating innovative digital products and training future members through an academy.

Software Development 🇫🇷 Marseille 109 2017
23
Netsystemnetsystem.fr

Netsystem is an IT consulting company specializing in digital transformation and information systems strategy, offering services in digital trust and digital transformation across various industries

IT Services and IT Consulting 🇫🇷 Aix-en-Provence 100 2003
24
Stanstanfrance.com

A leading French territorial influence consulting firm established in 2013, connecting private companies with key stakeholders to implement projects aligned with local development goals

Public Relations and Communications Services 🇫🇷 Marseille 86 2013
25
thecampthecamp.fr

Shapes a human, responsible, and sustainable world, bringing together companies, governments, territories, and individuals to tackle challenges and co-create future socio-economic models.

Events Services 🇫🇷 Aix-en-Provence 85 2017
26
TEREAterea.net

Professional environmental consulting company specializing in sustainable management of natural resources, conducting Environmental Impact Assessments, ecological inventories, and providing environmental expertise to various industries globally

Environmental Services 🇫🇷 Marseille 84 2004
27
Crowe Ficoreccrowe.com

A global service provider offering financial accounting, audit, advisory, tax, risk consulting, and internal audit services to companies across all industries

Accounting 🇫🇷 Marseille 79 1987
28
AXONEaxonegroup.com

Expertise in complex system architecture and safety, focusing on sustainable industrial optimization to balance ecology and technology for clients.

Business Consulting and Services 🇫🇷 Meyreuil 77 2016
29
Seasonseason-ed.com

Development of agile, Salesforce-based cloud software solutions for higher education institutions focusing on contact and interaction management.

IT Services and IT Consulting 🇫🇷 Aix-en-Provence 71 2018
30
Agence d'urbanisme de l'agglomération marseillaise (Agam)agam.org

The urban planning agency in Marseille provides studies, data, and analysis for public policy development, promoting collaboration and coordination among stakeholders

Architecture and Planning 🇫🇷 Marseille 71 1969

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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 12, 2026.

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