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30 leading professional services firms in the Gironde department

Tamtam tracks 151 professional services firms headquartered in the Gironde department. This list ranks the 30 largest by number of employees on LinkedIn, led by Filhet-Allard, RETRAITE complète and SERMA Group. Their median headcount is 227. Half of them were founded in 1994 or later. The most common headquarters are Bordeaux (11), Le Haillan (5) and Pessac (5).

🇫🇷 Gironde30 companiesUpdated Nov 11, 2026

This selection of professional services firms in Gironde includes large, established companies as well as younger firms. Industries represented include IT services, business consulting, and insurance. Many of these firms are headquartered in Bordeaux, with others in nearby towns such as Pessac, Mérignac, and Le Haillan.Filhet-Allard, founded in 1846, is an insurance brokerage. SERMA Group provides electronics solutions, while CAP INGELEC is an engineering company specializing in datacenters and critical utilities. CHEOPS TECHNOLOGY focuses on secure IT infrastructure and cloud computing. The data shows a concentration of IT services and consulting firms, reflecting a strong presence of technology-oriented professional services in the region. There is also a notable mix of long-standing companies like Filhet-Allard and more recently established firms such as Notaires Office, founded in 2020.

#CompanyIndustryHeadquarters EmployeesFounded
1
Filhet-Allardfilhetallard.com

A leading French insurance brokerage specializing in corporate risks and employee benefits, offering tailored insurance solutions, personalized service, and a motivating environment for employees

Insurance 🇫🇷 Bordeaux 1,700 1846
2
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
3
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
4
CAP INGELECcapingelec.com

An independent engineering company with over 30 years of experience, specializing in Datacenters, Critical Utilities, Industry, Cleanrooms, Agribusiness, Wines & Spirits

Construction 🇫🇷 Mérignac 773 1992
5
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
6
CHEOPS TECHNOLOGYcheops-technology.com

Specializing in secure IT infrastructure, this company is a leader in Cloud Computing in France With 4 divisions, they offer expertise in Cloud, Cybersecurity, and Technology Modernization

IT Services and IT Consulting 🇫🇷 Canéjan 601 1998
7
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
8
QUADRIAheliaq.fr

French-owned company focused on network and telecom architectures, infrastructure solutions, cloud computing, and management solutions for SMEs across France, Germany, and Switzerland.

IT Services and IT Consulting 🇫🇷 Le Haillan 495 1957
9
Notaires Officenotaires-office.fr

Cooperative network of notary offices across France, offering legal advice and services for life events like marriage, divorce, inheritance, and real estate, making law accessible.

Legal Services 🇫🇷 Pessac 459 2020
10
LUSEOluseogroup.com

A multidisciplinary building design firm offering specialized engineering and project administration services for real estate development, owners, developers, contractors, and consulting firms

Engineering Services 🇫🇷 Le Haillan 423 2004
11
INORIXinorix.fr

Private security services including human surveillance, executive protection, auditing, training, remote monitoring, and installation of electronic access control and video surveillance systems.

Security and Investigations 🇫🇷 Bordeaux 331 2018
12
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
13
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
14
GESTFORMgestform.com

Specializing in high-volume digitization services, administrative functions outsourcing, reprography, and software solutions for over 30 years, this company offers expertise tailored to clients' projects

IT Services and IT Consulting 🇫🇷 Mérignac 230 1986
15
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

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16
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
17
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
18
ERECAplurielerecapluriel.fr

Regional group providing accounting, auditing, and consulting services with 21 offices in Southwest France 300 specialists offer expertise in various business areas

Accounting 🇫🇷 Bordeaux 194 1978
19
SECURITE PROTECTIONsecuriteprotection.fr

French independent group providing event security, corporate services, custom software, and human-technology integration with strong client trust.

Security and Investigations 🇫🇷 Bordeaux 174 1994
20
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
21
Groupe ADRÉadre-groupe.fr

Reliable infrastructure projects, encompassing network detection, water leak repair, fiber optic engineering, and energy solutions like plumbing, HVAC, and sanitary installations.

Construction 🇫🇷 Mérignac 154 2012
22
VALEMOvalemo.fr

Specializing in operating, maintaining, and monitoring renewable energy parks onshore and offshore, with a focus on maximizing asset performance through tailored services

Services for Renewable Energy 🇫🇷 Bègles 148 2011
23
Applus+ Rescollrescoll.fr

Independent research company performing technical studies on innovative industrial applications of polymer materials, including resins, composites, adhesives, paints, varnishes, bonding, fire behavior, and surface treatments.

Business Consulting and Services 🇫🇷 Pessac 135 2001
24
Alphitan Groupalphitan.com

Specialized companies providing sales, repair, and maintenance of industrial electric motors, electronic systems, and automation across multiple European sites.

Industrial Machinery Manufacturing 🇫🇷 Bordeaux 112 1982
25
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
26
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
27
4SH4sh.fr

A digital services company specializing in custom software development, offering full project support from concept to implementation with a tech-focused culture

Software Development 🇫🇷 Le Haillan 91 2007
28
ASHLER & MANSONashler-manson.com

French mortgage brokerage offering competitive loan rates, insurance solutions, financial advice, and investment services with extensive bank partnerships.

Financial Services 🇫🇷 Bordeaux 89 2003
29
SYS1sys1.fr

SYS1 provides IT infrastructure services in Nouvelle Aquitaine and Occitanie/PACA regions, offering network solutions, server/storage integration, security expertise, and remote IT services

IT Services and IT Consulting 🇫🇷 Saint-Jean-d'Illac 85 1994
30
CBPcabinetcbp.com

A firm in Merignac with 3 partners and 50 staff providing accounting expertise and auditing services to over 600 clients, mainly SMEs in Nouvelle Aquitaine

Accounting 🇫🇷 Mérignac 69 1991

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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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