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The 30 largest consulting firms in the Gironde department

Tamtam tracks 82 consulting firms headquartered in the Gironde department. This list ranks the 30 largest by number of employees on LinkedIn, led by RETRAITE complète, SERMA Group and CF - Compagnie Fiduciaire. Their median headcount is 100. Half of them were founded in 2011 or later. The most common headquarters are Bordeaux (16), Pessac (4) and Le Haillan (3).

🇫🇷 Gironde30 companiesUpdated Nov 12, 2026

The Gironde department is home to a concentration of consulting firms, primarily in business, IT, and accounting services. These are mostly mid-sized firms, with several established companies founded in the 1980s and 1990s. Many of them operate beyond the local area, offering their expertise nationally or internationally.

Key players include SERMA Group, specializing in electronics solutions, and CF - Compagnie Fiduciaire, which provides accounting and auditing services. Heliaq Solutions and CIS focus on IT infrastructure and consulting, while RETRAITE complète offers retirement transition services. EXTENCIA is an independent accounting firm with specialized sector support.

#CompanyIndustryHeadquarters EmployeesFounded
1
RETRAITE complèteretraite-complete.com

The company provides consulting services to help individuals smoothly transition into retirement, anticipate their financial needs, and navigate post-career opportunities

Business Consulting and Services 🇫🇷 Eysines 1,569 n/a
2
SERMA Groupserma.com

An independent, international platform specializing in electronics solutions and services for high-stress environments, offering expertise in 5 core business lines

Business Consulting and Services 🇫🇷 Pessac 1,268 1991
3
CF - Compagnie Fiduciairecompagnie-fiduciaire.com

Provides accounting, auditing, and consulting services with a strong regional presence and over 600 professionals across multiple French regions.

Business Consulting and Services 🇫🇷 Bordeaux 728 1980
4
Heliaq Solutionskct.fr

Provision of IT infrastructure, integration, consulting, managed services, and customizable hybrid cloud solutions for businesses and public organizations.

IT Services and IT Consulting 🇫🇷 Le Haillan 495 1998
5
CIScisclaims.com

The company assists clients in defining IT system architecture, integrating infrastructure, and providing operational support to ensure smooth functioning

IT Services and IT Consulting 🇫🇷 Le Haillan 318 1986
6
EXTENCIA | Cabinet d'expertise comptableextencia.fr

Independent accounting firm providing advisory, legal, tax, HR, and marketing support across specialized sectors like pharmacy, real estate, and construction for businesses.

Accounting 🇫🇷 Bordeaux 272 n/a
7
SERMA Safety and Securityserma-safety-security.com

Provides expertise, evaluation, and consulting for product and system security and safety, covering cybersecurity, functional safety, and formal methods, for various industries.

Computer and Network Security 🇫🇷 Pessac 227 2016
8
GCL - l'innovation dans l'accompagnement des entreprisesgclnet.fr

National network providing accounting, audit, legal, payroll, and HR expertise to support SMEs throughout all business lifecycle stages.

Business Consulting and Services 🇫🇷 Bordeaux 227 1980
9
SERMA Technologiesserma-technologies.com

Specialist in analysis, control, and expertise of electronic components, boards, and systems with extensive testing laboratory resources.

Business Consulting and Services 🇫🇷 Pessac 220 1991
10
Alltech Consultingalltechconsulting.fr

Growing organization with dynamic technical teams across multiple cities, focusing on employee growth, tailored development, and collaborative career building.

IT Services and IT Consulting 🇫🇷 Bordeaux 160 2015
11
AQUITEMgroupe-aquitem.fr

A team of 130 professionals specializing in direct marketing, databases, networks, security, internet, and IT management, providing comprehensive IT solutions and support

IT Services and IT Consulting 🇫🇷 Le Bouscat 111 1987
12
Apave International Groupapave-international.com

With 150 years of experience in France, Apave expanded globally in 2010 to provide reliable services through an Integrated Management System

International Trade & Development 🇫🇷 Artigues-près-Bordeaux 108 1867
13
NEOSYSneosys.fr

Provides digital transformation consulting, training, software integration, and custom IT solutions for businesses in Europe and North Africa.

IT Services and IT Consulting 🇫🇷 Bordeaux 103 2012
14
umakeumake.fr

Engineering consulting firm supporting those shaping the world of tomorrow through IT & Digital, Telecom, and Smart Industry projects, emphasizing human adventure

IT Services and IT Consulting 🇫🇷 Bordeaux 103 2021
15
Théliothelio.fr

Data consulting and integration firm focused on making data accessible to all businesses, driving performance, innovation, and humanity through data intelligence

Business Consulting and Services 🇫🇷 Bordeaux 100 2011

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16
Restauration Hôtellerie Loisirs - Bordeaux-Aquitaine

The company offers specialized management services to independent hospitality and leisure organizations, focusing on improving results, developing activities, and optimizing performance

Business Consulting and Services 🇫🇷 Bordeaux 95 2014
17
BeTomorrowbetomorrow.com

A tech and innovation agency with 80 digital experts, specializing in high-stakes projects to create exceptional digital solutions for leading national and international companies

Software Development 🇫🇷 Bordeaux 74 2002
18
Lorélore.fr

Providing innovative software and expert tax and investment advice, merging financial consulting with technology for real estate businesses.

Software Development 🇫🇷 Bordeaux 73 2009
19
SERMA Energyserma-energy.com

Offers consulting, expertise, and testing for energy, supporting clients throughout the value chain with resources for current and future standard technologies.

Business Consulting and Services 🇫🇷 Pessac 63 2018
20
WeViiwevii.net

A digital services company focusing on innovative management, personalized career development, and customer satisfaction, with plans to expand nationwide

IT Services and IT Consulting 🇫🇷 Bordeaux 62 2019
21
SOCAMA INGENIERIEsocama.fr

Providing technical and objective engineering solutions for hydraulic, urban, environmental, and water cycle projects to support client success.

Environmental Services 🇫🇷 Le Haillan 58 n/a
22
IDAIAidaia.group

With over 30 years of experience, this company specializes in marketing, communication, and digital transformation for B2B and B2C clients through a full range of services

IT Services and IT Consulting 🇫🇷 Bruges 52 1988
23
Rubbeesrubbees.com

A collective of independent consultants in the south-west of France providing expertise to businesses through individual and group missions

Business Consulting and Services 🇫🇷 Bordeaux 49 2019
24
CATIE (Centre Aquitain des Technologies de l'Information et Électroniques)catie.fr

A technological transfer center focused on supporting companies in adopting digital technologies through research programs and technological platforms

IT Services and IT Consulting 🇫🇷 Talence 48 2014
25
CONCRETconcret.fr

Strategic consulting firm specialized in digital transformation, supply chain, industrial management, customer relations, change management, quality management, and certification Partnered with IFS

Business Consulting and Services 🇫🇷 Mérignac 44 1998
26
LOOM CONSULTINGweareloom.fr

LOOM is a Bordeaux-based consulting company specializing in IT/Web project management, now expanding to the Parisian market with a team of 50 skilled consultants

IT Services and IT Consulting 🇫🇷 Bordeaux 42 2018
27
FINALLIfinalli.com

Platform providing startups and SMEs with tools to self-assess eligibility for research and innovation tax credits and subsidies.

Software Development 🇫🇷 Bordeaux 38 2016
28
ALTO STEPaltostep.eu

ALTO STEP is an urban planning consultancy specializing in sustainable development, climate resilience, participatory approaches, and infrastructure design for livable, inclusive cities

Architecture and Planning 🇫🇷 Bordeaux 38 2008
29
Inflexsysinflexsys.com

Develops and integrates custom IT solutions, assisting businesses with digital transformation through expert delegation, project management, and integrating existing technological components.

IT Services and IT Consulting 🇫🇷 Mérignac 36 2011
30
La Directionladirection.io

A financial consulting firm providing outsourced CFO services to innovative companies and transaction services to VC investors Helping organizations improve performance and growth

Financial Services 🇫🇷 Bordeaux 30 2020

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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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