The professional services sector in Rennes features a mix of established mid-sized firms and younger companies. Key activities include staffing and recruiting, IT services, and accounting. Interaction Interim, with 1055 employees, provides temporary work and recruitment. RBI specializes in information systems design and integration, while Geirec and CAPEOS offer comprehensive accounting and advisory services. Groupe Creative focuses on IT and digital transformation projects.
A notable pattern among these companies is their strong local presence, with all listed headquarters located in Rennes. This suggests a concentration of professional expertise within the city. The firms also span a range of founding dates, from Geirec and CAPEOS established in 1979, to newer entities like Happy to meet you, founded in 2016, indicating a continuous evolution of the professional services landscape.
| # | Company | Employees | |||
|---|---|---|---|---|---|
| 1 |
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 | |||
| 2 |
RBIrbi-informatique.fr
Specializing in information systems design, implementation, and integration, RBI-Informatique offers services in infrastructure, collaboration, and management solutions for businesses |
468 | |||
| 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 |
308 | |||
| 4 | 266 | ||||
| 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. |
232 | |||
| 6 |
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 | |||
| 7 |
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 | |||
| 8 |
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 | |||
| 9 |
TALENZ TOADENNtalenz.fr
Multidisciplinary consulting firm supporting entrepreneurs and business leaders with strategy, finance, compliance, audit, legal, HR, and technology solutions. |
92 | |||
| 10 |
ADENTadentingenierie.com
Designing sustainable and adaptable agri-food factories that are both thoughtful and harmonious in their construction and operation |
92 | |||
| 11 | 88 | ||||
| 12 |
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 | |||
| 13 |
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 | |||
| 14 |
Provectioprovectio.fr
IT services provider offering IT management, security, cloud computing, telecommunications, and network availability for businesses, providing support, strategy, and technical expertise |
48 | |||
| 15 |
CELIADEceliade.com
Experienced jurists providing social law expertise, professional training, and dedicated support to staff representatives for improved social dialogue and mandate management. |
45 | |||
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 |
Immobilière d’Entrepriseimmobiliere-entreprise.fr
Offers specialized professional and commercial real estate services across multiple locations, leveraging two decades of local market knowledge and active community involvement. |
42 | |||
| 17 |
AGC Cuma Ouestouest.cuma.fr
An association providing accounting and management services for agricultural cooperatives in the western region, with a focus on expert accountant guidance |
40 | |||
| 18 |
SpikeeLabsspikeelabs.fr
SpikeeLabs provides information system design, development, integration, and support services with a focus on growth, innovation, and strong human values |
38 | |||
| 19 | 36 | ||||
| 20 | 32 | ||||
| 21 |
DUGUESCLIN NOTAIRESnotaires-duguesclin.fr
A notarial firm with offices in Rennes and Paris, offering a wide range of traditional and specialized services with a focus on excellence |
31 | |||
| 22 |
Carcreff, Société d'Avocatscarcreff-avocats.com
Business law firm providing global and pragmatic legal solutions for complex strategic, investment, taxation, and social law issues, tailored to clients' personal aspirations |
28 | |||
| 23 |
Younight Hospitalityyounight-hospitality.com
A hospitality management company assisting with hotel projects from acquisition to operations, ensuring thorough support throughout the entire process |
24 | |||
| 24 |
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 | |||
| 25 |
Net-ngnet-ng.com
A Rennes-based ESN specializing in custom Python web app development, providing tailored solutions across various industries since 2003 |
20 | |||
| 26 |
Theodore Searchtheodore-search.com
Specializing in executive search and recruitment, this firm offers tailored support for strategic hires They are also dedicated to fighting recruitment discrimination |
16 | |||
| 27 |
Capnot Notaires - L’Expertise Notarialecapnot.fr
CAPNOT is a network of notarial studies created in 2015, bringing together over 130 notaries and 560 employees to offer comprehensive notarial services |
12 | |||
| 28 | 9 | ||||
| 29 |
Farsight VRfarsight-vr.com
FARSIGHT specializes in creating custom virtual reality environments, augmented reality applications, and precise 3D modeling using the latest technologies |
9 | |||
| 30 |
COTÉ 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 | |||
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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.
More company lists in Rennes
- The largest companies in Rennes 600
- Retail chains in Rennes 50
- SaaS companies in Rennes 49
- Public sector organisations in Rennes 47
- Companies with in-house R&D in Rennes 43
- Software Development companies in Rennes 40
- Law Practice companies in Rennes 39
- Education providers in Rennes 38
- Multinational companies in Rennes 33
- Subscription businesses in Rennes 27
- Legal Services companies in Rennes 26
- Real Estate companies in Rennes 26
- IT services companies in Rennes 26
- Consulting firms in Rennes 25
- Recruitment and staffing agencies in Rennes 25
The same list elsewhere in France
- Professional services firms in France 6,610
- Professional services firms in Île-de-France 3,377
- 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 316
- 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