These Rennes-based consulting firms primarily operate in IT services, accounting, and broader business consulting. The companies range from established firms like RBI, founded in 1981, to younger entities such as Happy to meet you, established in 2016. Most appear to be mid-sized firms, with employee counts varying from 36 to 468.
Key players include RBI, specializing in information systems, and Geirec, an independent regional accounting cabinet. Groupe Creative focuses on IT and digital transformation projects, while Tourny Meyer offers business real estate consulting. A notable pattern is the strong presence of IT services and consulting companies, indicating a concentration of digital expertise in Rennes.
| # | Company | Employees | |||
|---|---|---|---|---|---|
| 1 |
RBIrbi-informatique.fr
Specializing in information systems design, implementation, and integration, RBI-Informatique offers services in infrastructure, collaboration, and management solutions for businesses |
468 | |||
| 2 |
Geirecgeirec.com
An independent regional cabinet with a national focus, GEIREC supports businesses with expertise and values, offering daily partnership, confidentiality, competence, and responsiveness |
308 | |||
| 3 | 266 | ||||
| 4 |
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. |
232 | |||
| 5 |
Tourny Meyertournymeyer.fr
Offers business real estate consulting, sales, and leasing services for offices, warehouses, retail, hotels, and urban developments across multiple French cities. |
101 | |||
| 6 | 100 | ||||
| 7 |
TALENZ TOADENNtalenz.fr
Multidisciplinary consulting firm supporting entrepreneurs and business leaders with strategy, finance, compliance, audit, legal, HR, and technology solutions. |
92 | |||
| 8 |
ADENTadentingenierie.com
Designing sustainable and adaptable agri-food factories that are both thoughtful and harmonious in their construction and operation |
92 | |||
| 9 |
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. |
71 | |||
| 10 |
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 |
71 | |||
| 11 |
L'Optimiste le Groupeloptimiste.fr
Collective of experts providing strategy, accounting, HR, legal, financing, and CSR support to over 1,500 SMEs in France. |
68 | |||
| 12 | 64 | ||||
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| 13 |
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 |
44 | |||
| 14 |
SpikeeLabsspikeelabs.fr
SpikeeLabs provides information system design, development, integration, and support services with a focus on growth, innovation, and strong human values |
38 | |||
| 15 | 36 | ||||
| 16 |
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 |
35 | |||
| 17 |
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. |
25 | |||
| 18 |
VeoNumveonum.com
Rennes-based consultancy firm with a human-centric approach, offering tailored training, benefits, and a focus on R&D in AI, machine learning, and video streaming technologies Join our team! |
25 | |||
| 19 |
Serenis Consultingserenis-consulting.fr
Specialized consulting firm auditing property taxes for professionals 18 years of experience, serving over 10,000 clients in France Offers comprehensive services and sponsors athletes |
22 | |||
| 20 | 9 | ||||
| 21 |
COT脡 PROFINANCEcoteprofinance.fr
We are a wealth management consulting firm offering services such as asset assessment, tax and estate planning, financial and real estate investments |
8 | |||
| 22 |
JBG Consultantsjbg.fr
Consulting firm specializing in organization, supply chain, and information systems for agricultural, agri-food, and distribution sectors, helping companies improve performance and adapt to market changes |
8 | |||
| 23 |
Timwi Consultingtimwi.com
Specializes in agile software development, architecture, and services using SOA/ESB, Java/JEE, .Net, emphasizing software craftsmanship. |
8 | |||
| 24 |
ATHENA FINANCE CONSEILathenaconseil.fr
Specializing in corporate finance, this company offers expertise in financial engineering and funding solutions for SMEs/ETIs' projects, advising on growth, restructuring, and acquisitions |
4 | |||
| 25 |
R茅ussysreussys.com
Develops digital tools for HR to measure and improve employees' emotional states using neuroscience, enhancing workplace wellbeing and performance. |
1 | |||
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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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The same list elsewhere in France
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