The companies listed in Rennes are primarily IT services and consulting firms, ranging from mid-sized companies to younger firms. SIB, with 499 employees, focuses on digital health and public sector IT. RBI specializes in information systems design and integration, while Groupe Creative works on IT and digital transformation projects. 6TM supports clients with web, mobile, and software solutions, and CYIM provides IT and audiovisual services for medical societies. UNIXO offers IT solutions for SMEs and local authorities.
A common pattern among these companies is their focus on digital solutions and IT infrastructure. The majority of the firms listed are headquartered in Rennes, indicating a local concentration of expertise in IT services.
| # | Company | Employees | |||
|---|---|---|---|---|---|
| 1 |
SIB [numérique, santé et secteur public]sib.fr
Innovative cooperative in digital health and public sector, serving 620+ institutions in modernizing their IT systems with a wide range of services and expertise |
499 | |||
| 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 |
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 | |||
| 4 |
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 | |||
| 5 | 100 | ||||
| 6 | 90 | ||||
| 7 | 88 | ||||
| 8 | 64 | ||||
| 9 |
Provectioprovectio.fr
IT services provider offering IT management, security, cloud computing, telecommunications, and network availability for businesses, providing support, strategy, and technical expertise |
48 | |||
| 10 |
Groupe Pandoragroupe-pandora.com
Support for telecom and IT projects across northern France, offering technical expertise, personalized services, and strong team collaboration. |
42 | |||
| 11 |
SpikeeLabsspikeelabs.fr
SpikeeLabs provides information system design, development, integration, and support services with a focus on growth, innovation, and strong human values |
38 | |||
| 12 |
MAX Digital Servicesmaxds.fr
MAX DS is a digital services company focused on a collaborative model, prioritizing human values to provide high-quality consulting, software engineering, testing, and project management services |
34 | |||
| 13 |
Cognix Systemscognix-systems.com
Consulting, designing, and developing websites, advanced web applications, and software with a focus on ergonomic, high-value web portals. |
34 | |||
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| 14 |
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 | |||
| 15 |
Agence LunaWeblunaweb.fr
LunaWeb Agency specializes in designing user-centered web interfaces, providing strategic advice and technical development for engaging and responsive web experiences since 2004 |
23 | |||
| 16 |
Net-ngnet-ng.com
A Rennes-based ESN specializing in custom Python web app development, providing tailored solutions across various industries since 2003 |
20 | |||
| 17 |
Linaïalinaia.com
Based in the heart of Rennes, Linaïa is a consulting and digital services agency, supporting projects and businesses with specialized web and mobile development teams |
10 | |||
| 18 |
Farsight VRfarsight-vr.com
FARSIGHT specializes in creating custom virtual reality environments, augmented reality applications, and precise 3D modeling using the latest technologies |
9 | |||
| 19 |
Slickteamslickteam.fr
Specializing in web and mobile development, technical training, and innovation projects for clients in energy management, healthcare, and industrial processes |
8 | |||
| 20 |
Conjectoconjecto.com
A multidisciplinary team specializing in data engineering and interface design, facilitating innovative projects with a focus on challenging solutions |
8 | |||
| 21 |
Timwi Consultingtimwi.com
Specializes in agile software development, architecture, and services using SOA/ESB, Java/JEE, .Net, emphasizing software craftsmanship. |
8 | |||
| 22 |
Kornogkornog.bzh
Kornog is supported by the CAE Élan Créateur, assisting in the company's growth and development |
7 | |||
| 23 |
TV Wondertvwonder.fr
This company specializes in creating smart workspaces and dynamic signage solutions to enhance collaboration, communication, and customer engagement through innovative technologies |
6 | |||
| 24 |
Groupe Regardsklaxoon.com
Development of innovative interactive fixed and mobile digital applications for SMEs, large companies, and communication agencies. |
6 | |||
| 25 |
Doptim - Data Optimizersdoptim.eu
An engineering company in Brittany and Quebec specializing in data projects, AI algorithms, software platforms, and AI solutions for healthcare and genealogy |
4 | |||
| 26 |
Digital4Better x fruggrdigital4better.com
Measurement software and consulting services for environmental footprint tracking, eco-design, accessibility audits, and corporate socially responsible information system management strategies. |
3 | |||
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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
- Professional services firms in Rennes 44
- 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
- Consulting firms in Rennes 25
- Recruitment and staffing agencies in Rennes 25
The same list elsewhere in France
- IT services companies in France 5,000
- IT services companies in Île-de-France 2,624
- IT services companies in the Hauts-de-Seine department 737
- IT services companies in Auvergne-Rhône-Alpes 519
- IT services companies in the Rhône department 286
- IT services companies in Occitanie 280
- IT services companies in Provence-Alpes-Côte d'Azur 268
- IT services companies in Grand Est 248
- IT services companies in Hauts-de-France 236
- IT services companies in Pays de la Loire 205
- IT services companies in Nouvelle-Aquitaine 194
- IT services companies in the Nord department 170
- IT services companies in the Haute-Garonne department 158
- IT services companies in the Bouches-du-Rhône department 155
- IT services companies in the Loire-Atlantique department 130
- IT services companies in the Yvelines department 121
- IT services companies in Brittany 113
- IT services companies in the Val-de-Marne department 101
- IT services companies in the Gironde department 99
- IT services companies in Paris 1,386
- IT services companies in Lyon 171
- IT services companies in Boulogne-Billancourt 125
- IT services companies in Toulouse 119
- IT services companies in Levallois-Perret 94