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Consulting firms headquartered in the Ille-et-Vilaine department

Tamtam tracks 54 consulting firms headquartered in the Ille-et-Vilaine department. This list ranks the 30 largest by number of employees on LinkedIn, led by INNOVAL, RBI and Geirec. Their median headcount is 71. Half of them were founded in 1999 or later. The most common headquarters are Rennes (17), Cesson-Sévigné (3) and Saint-Malo (2).

🇫🇷 Ille-et-Vilaine30 companiesUpdated Nov 15, 2026

These companies in Ille-et-Vilaine predominantly offer business consulting and IT services, alongside accounting and some specialized industrial support. Many are mid-sized firms, with several established in the late 1970s and 1980s. Notable examples include INNOVAL, a cooperative providing advisory and genetics services to livestock farmers; RBI, specializing in information systems design and integration; Geirec, an independent regional cabinet supporting businesses with expertise; and Aqualeha, which offers services to prevent food, safety, and environmental risks.

A significant cluster of these companies, such as RBI, Geirec, CAPEOS, and Groupe Creative, are headquartered in Rennes, indicating its role as a central hub for business and IT services within the department. The presence of firms like INNOVAL and Aqualeha suggests a focus on supporting the agricultural and food industries, which are prominent in the region.

#CompanyIndustryHeadquarters EmployeesFounded
1
INNOVALinnoval.com

Cooperative providing personalized advisory, health, reproduction, and genetics services to livestock farmers for improved performance and sustainability.

Farming 🇫🇷 Noyal-sur-Vilaine 732 n/a
2
RBIrbi-informatique.fr

Specializing in information systems design, implementation, and integration, RBI-Informatique offers services in infrastructure, collaboration, and management solutions for businesses

IT Services and IT Consulting 🇫🇷 Rennes 468 1981
3
Geirecgeirec.com

An independent regional cabinet with a national focus, GEIREC supports businesses with expertise and values, offering daily partnership, confidentiality, competence, and responsiveness

Accounting 🇫🇷 Rennes 308 1979
4
CAPEOScapeos.fr

Provides comprehensive accounting, legal, and tax services alongside audit, wealth management, and IT solutions for companies across diverse sectors through local offices.

Accounting 🇫🇷 Rennes 266 1979
5
Groupe Creativegroupe-creative.fr

Works with clients on IT and digital transformation projects, offering expertise in consulting, creation, development, research, and innovation across various digital domains.

IT Services and IT Consulting 🇫🇷 Rennes 232 2008
6
Aqualehaaqualeha.com

The company offers a range of services to prevent food, safety, and environmental risks for the protection of assets and individuals

Biotechnology Research 🇫🇷 Vitré 216 1984
7
Groupe SECOBsecob.fr

Provides accounting, payroll, and audit services supporting over 3500 companies in creation, development, and business transfer phases.

Business Consulting and Services 🇫🇷 Cesson-Sévigné 192 1963
8
Sodifrancesodifrance.fr

Provides technology consulting, digital transformation, data management, application and infrastructure services to enhance organizational competitiveness and collaboration.

IT Services and IT Consulting 🇫🇷 Saint-Grégoire 172 1986
9
Tourny Meyertournymeyer.fr

Offers business real estate consulting, sales, and leasing services for offices, warehouses, retail, hotels, and urban developments across multiple French cities.

Real Estate 🇫🇷 Rennes 101 1990
10
6TM6tm.com

6TM supports clients in achieving effective communication through web, mobile, and software solutions, with services ranging from e-commerce to custom development and e-tourism

IT Services and IT Consulting 🇫🇷 Rennes 100 1998
11
TALENZ TOADENNtalenz.fr

Multidisciplinary consulting firm supporting entrepreneurs and business leaders with strategy, finance, compliance, audit, legal, HR, and technology solutions.

Business Consulting and Services 🇫🇷 Rennes 92 n/a
12
ADENTadentingenierie.com

Designing sustainable and adaptable agri-food factories that are both thoughtful and harmonious in their construction and operation

Construction 🇫🇷 Rennes 92 2006
13
APAVE REGION BRETAGNE-MAINEapave.com

Apave provides comprehensive risk management services to companies and communities worldwide, aiming to increase safety, protect the environment, and optimize organizational performance

Environmental Services 🇫🇷 Le Rheu 89 1867
14
BSL - DIMOTRANS Groupdimotrans-group.com

With over 20 years of e-commerce and retail logistics expertise, we offer comprehensive services focused on agility, innovation, and personalized solutions in France

Transportation, Logistics, Supply Chain and Storage 🇫🇷 Bruz 89 1997
15
Happy to meet youhappytomeetyou.fr

Provides human resources and communication expertise to companies, focusing on executive recruitment and HR consulting, including organizational transformation, development, and skill assessments.

Human Resources Services 🇫🇷 Rennes 71 2016

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16
Fleet Services Groupfleetservicesgroup.com

This company offers Sales & Marketing services, specialized in IT It provides go-to-market strategies, lead generation, inside sales, and consulting for large companies

IT Services and IT Consulting 🇫🇷 Rennes 71 2003
17
L'Optimiste le Groupeloptimiste.fr

Collective of experts providing strategy, accounting, HR, legal, financing, and CSR support to over 1,500 SMEs in France.

Accounting 🇫🇷 Rennes 68 2016
18
LIKSIliksi.fr

LIKSI is a software development company in Rennes and Nantes, offering high-quality services with expertise in open source technologies and agile project teams

IT Services and IT Consulting 🇫🇷 Rennes 64 2017
19
HPC Envirotec SAShpc.ag

An environmental engineering company specializing in land recycling, consultancy, and infrastructure planning, part of a global alliance offering environmental services worldwide

Environmental Services 🇫🇷 Saint-Erblon 54 1993
20
Cabinet BOURGOIS - Groupe MERLINcabinet-merlin.fr

A recognized player in environmental consulting and engineering for over 80 years, based in Betton, France, as a subsidiary of Groupe MERLIN

Environmental Services 🇫🇷 Betton 53 1938
21
Oxxeooxxeo.fr

A human-sized IT consulting company in Rennes, specializing in digital transformation with a focus on App Engineering, DevOps, Cloud, and Project Management They prioritize employee well-being and career growth

IT Services and IT Consulting 🇫🇷 Cesson-Sévigné 46 2017
22
Make the Gradehubs.li

A B2B agency supporting business growth through client acquisition, offering strategies in SEO, marketing, and sales to boost online presence and drive revenue

Business Consulting and Services 🇫🇷 Rennes 44 2018
23
SpikeeLabsspikeelabs.fr

SpikeeLabs provides information system design, development, integration, and support services with a focus on growth, innovation, and strong human values

IT Services and IT Consulting 🇫🇷 Rennes 38 2016
24
IDÉISideis.com

Specialized training organization focusing on management and communication skills at work, offering tailored solutions to enhance relationships, teamwork, and enthusiasm

Professional Training and Coaching 🇫🇷 Rennes 36 1997
25
ORNISECornisec.com

ORNISEC is a leading cybersecurity consultancy firm offering services such as advice, audits, training, compliance, crisis management, putting a focus on practical and hands-on approach

Computer and Network Security 🇫🇷 Rennes 35 2020
26
OGI Groupeogi-groupe.fr

OGI provides successful IT project implementation and management services to companies of all sizes and sectors, offering expertise in software deployment and infrastructure setup

IT Services and IT Consulting 🇫🇷 Chartres-de-Bretagne 33 2000
27
Synergizsynergiz.com

Provides intuitive, connected, and interactive solutions, specializing in Mixed Reality. Supports businesses with XR projects from start to finish including hardware, software, and custom development.

IT Services and IT Consulting 🇫🇷 Saint-Malo 32 2011
28
Abelium Entreprisesinformatique-logiciel-bretagne.com

A reliable and proactive IT partner providing quality services tailored to clients' needs, with a focus on innovation, technical expertise, and customer support

IT Services and IT Consulting 🇫🇷 Saint-Malo 28 1999
29
Océane Consulting Data Managementdm.oceaneconsulting.com

Océane Consulting Data Management is a digital transformation company specializing in document, data, and digital solutions for clients in Europe and the Middle East

IT Services and IT Consulting 🇫🇷 Cesson-Sévigné 26 n/a
30
Valorial, cluster d'innovation agri-agropole-valorial.fr

Cluster supporting sustainable agri-food innovation through personalized programs, tailored consulting, extensive networking, and project financing assistance for 400 members.

Food and Beverage Manufacturing 🇫🇷 Rennes 25 2006

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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 15, 2026.

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