The companies in Ille-et-Vilaine predominantly operate in professional services, with a notable presence of mid-sized firms. These include a strong focus on business consulting, staffing, and IT services. Companies like Groupe SAMSIC offer facility management and HR services, while Interaction Interim specializes in temporary work and recruitment.
Other significant firms are ABER Propreté, providing industrial cleaning, RBI, focused on IT systems design and integration, and Office Notarial Anastasia Moreau, offering legal services. The data shows a concentration of headquarters in Rennes and Cesson-Sévigné, indicating these cities as key hubs for professional services in the region.
| # | Company | Employees | |||
|---|---|---|---|---|---|
| 1 |
Groupe SAMSICsamsic.com
With over 30 years of experience, we prioritize human and professional values while offering tailored solutions in facility management and HR services |
6,680 | |||
| 2 |
Interaction Interiminteraction-interim.com
National network providing temporary work, recruitment for fixed-term and permanent contracts, training, support, and consulting services across all business sectors. |
1,055 | |||
| 3 |
ABER Propretéaberproprete.fr
Providing high-quality industrial cleaning and hygiene services with continuous employee training and precise service monitoring since 1975. |
682 | |||
| 4 |
NET PLUSnet-plus.fr
A company specializing in cleaning services, prioritizing customer satisfaction, quality interventions, and social responsibility with a focus on employee well-being and respect |
521 | |||
| 5 |
RBIrbi-informatique.fr
Specializing in information systems design, implementation, and integration, RBI-Informatique offers services in infrastructure, collaboration, and management solutions for businesses |
468 | |||
| 6 |
Office Notarial Anastasia Moreaumoreau-fougeres.notaires.fr
Located in the heart of Fougères, this company offers legal services in real estate, family, and corporate law, focusing on accessibility, listening, and modernity |
447 | |||
| 7 |
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 | |||
| 8 |
SPCservicepro-bretagne.com
This company specializes in industrial automation and robotics, supporting integrators and manufacturers in their projects with expert guidance. |
277 | |||
| 9 | 266 | ||||
| 10 | 259 | ||||
| 11 |
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 | |||
| 12 |
Intérim Emploi Serviceinterim-emploi-service.fr
A company in Rennes offering temporary work, job placements, and professional development while prioritizing employee skills, safety, diversity, and discrimination prevention |
228 | |||
| 13 |
Aqualehaaqualeha.com
The company offers a range of services to prevent food, safety, and environmental risks for the protection of assets and individuals |
216 | |||
| 14 |
Groupe SECOBsecob.fr
Provides accounting, payroll, and audit services supporting over 3500 companies in creation, development, and business transfer phases. |
192 | |||
| 15 |
Groupe Interactioninteraction-groupe.com
This company facilitates employment access, offering temp agencies, recruitment firms, specialized services, digital solutions, and a training center for diverse job seekers. |
178 | |||
Want more companies than this list?This page shows the largest ones only. Connect to Tamtam to see every company that matches, filter by size, industry or growth, and reach their decision-makers. | |||||
| 16 |
Lavancelavance.com
Provider of vehicle washing equipment and services including high-pressure centers, tunnels, water recycling, financing, maintenance, and station operation support. |
168 | |||
| 17 |
TALENDItalendi.com
A social enterprise offering industrial and digital services, employing over 550 people, including 420 with disabilities, with expertise in various fields like assembly and logistics |
137 | |||
| 18 |
Adventieladventiel.fr
Adventiel is a specialized consultancy firm assisting agricultural and food industries in transitioning to sustainable models through customized digital solutions |
107 | |||
| 19 |
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 | |||
| 20 |
TALENZ TOADENNtalenz.fr
Multidisciplinary consulting firm supporting entrepreneurs and business leaders with strategy, finance, compliance, audit, legal, HR, and technology solutions. |
92 | |||
| 21 |
ADENTadentingenierie.com
Designing sustainable and adaptable agri-food factories that are both thoughtful and harmonious in their construction and operation |
92 | |||
| 22 |
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 |
89 | |||
| 23 | 88 | ||||
| 24 |
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 | |||
| 25 |
Excelis Conseilexcelis-conseil.fr
Accounting and audit firm with 75 professionals and 6 partners in Rennes and Vannes Serving 1,500+ clients in the Grand Ouest region |
70 | |||
| 26 |
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 | |||
| 27 |
COMPTAGESMAcomptagesma.com
Comptagesma guides entrepreneurs from company creation to accounting, tax optimization, and strategic advice, with a focus on proximity, technology, and social responsibility |
67 | |||
| 28 |
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 |
53 | |||
| 29 |
Digitalisdigitalis.fr
Digitalis specializes in providing custom, user-friendly audiovisual solutions to enhance workspaces, focusing on innovation, simplicity, and productivity for businesses and institutions |
51 | |||
| 30 |
Provectioprovectio.fr
IT services provider offering IT management, security, cloud computing, telecommunications, and network availability for businesses, providing support, strategy, and technical expertise |
48 | |||
Turn this list into pipeline
Tamtam finds the decision-makers at every company on a list like this one, with verified emails, phone numbers and the buying signals that tell you when to reach out.
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 13, 2026.
More company lists in the Ille-et-Vilaine department
- The largest companies in the Ille-et-Vilaine department 1,454
- Companies with in-house R&D in the Ille-et-Vilaine department 152
- Retail chains in the Ille-et-Vilaine department 135
- Multinational companies in the Ille-et-Vilaine department 118
- Manufacturers in the Ille-et-Vilaine department 100
- SaaS companies in the Ille-et-Vilaine department 85
- Family-owned companies in the Ille-et-Vilaine department 81
- Software Development companies in the Ille-et-Vilaine department 80
- Public sector organisations in the Ille-et-Vilaine department 75
- IT Services and IT Consulting companies in the Ille-et-Vilaine department 67
- IT services companies in the Ille-et-Vilaine department 65
- Hardware manufacturers in the Ille-et-Vilaine department 61
- Education providers in the Ille-et-Vilaine department 60
- Distributors and wholesalers in the Ille-et-Vilaine department 58
- Consulting firms in the Ille-et-Vilaine department 54
- Food and Beverage Manufacturing companies in the Ille-et-Vilaine department 46
- Retail companies in the Ille-et-Vilaine department 46
- Critical infrastructure operators in the Ille-et-Vilaine department 45
- Financial services firms in the Ille-et-Vilaine department 45
- Subscription businesses in the Ille-et-Vilaine department 45
- Construction companies in the Ille-et-Vilaine department 43
- Law Practice companies in the Ille-et-Vilaine department 43
- Higher Education companies in the Ille-et-Vilaine department 41
- Legal Services companies in the Ille-et-Vilaine department 41
The same list elsewhere in France
- Professional services firms in France 6,610
- Professional services firms in Île-de-France 3,376
- Professional services firms in Auvergne-Rhône-Alpes 711
- Professional services firms in the Hauts-de-Seine department 629
- Professional services firms in Provence-Alpes-Côte d'Azur 433
- Professional services firms in the Rhône department 400
- Professional services firms in Occitanie 399
- Professional services firms in Grand Est 317
- Professional services firms in Nouvelle-Aquitaine 308
- Professional services firms in Hauts-de-France 260
- Professional services firms in Pays de la Loire 253
- Professional services firms in the Bouches-du-Rhône department 249
- Professional services firms in the Haute-Garonne department 208
- Professional services firms in the Nord department 178
- Professional services firms in Brittany 167
- Professional services firms in the Loire-Atlantique department 158
- Professional services firms in the Gironde department 151
- Professional services firms in Normandy 114
- Professional services firms in the Yvelines department 108
- Professional services firms in Paris 2,241
- Professional services firms in Lyon 265
- Professional services firms in Toulouse 139
- Professional services firms in Marseille 123
- Professional services firms in Boulogne-Billancourt 102