| # | Company | Employees |
|---|---|---|
| 1 |
Keyruskeyrus.com
Architects reliable intelligence foundations, human-in-command governance, and performance steering to operationalize intelligence for adaptive, resilient, continuously improving organizations. |
2,020 |
| 2 |
Axys Consultantsaxys-consultants.com
Management consultancy providing digital transformation, data analytics, and operational excellence services across procurement, finance, marketing, and sales departments for large international corporate clients. |
227 |
| 3 | 200 | |
| 4 |
Mediaveille - MV Groupyumens.fr
Provides online marketing consulting and services including web analytics, SEO, social media, web marketing, strategic monitoring, and training. |
189 |
| 5 |
Sekoiasekoia.com
Building a cyber operations platform for the AI era, unifying threat intelligence, detection, response, and exposure management, making advanced defense accessible. |
165 |
| 6 |
Siradelsiradel.com
A digital technology company, part of ENGIE Group, specializing in geodata production, 3D modeling, simulation, and AI for sustainable and digital transformation in various sectors |
150 |
| 7 |
Unseenlabslinktr.ee
A French company using nanosatellites and RF detection technology to geolocate vessels, combat unlawful activities at sea, and provide data worldwide |
133 |
| 8 |
Digitaleodigitaleo.com
Digitaleo offers a relational marketing solution for businesses to manage loyalty programs and direct marketing campaigns to drive in-store traffic effectively |
133 |
| 9 |
Adventieladventiel.fr
Adventiel is a specialized consultancy firm assisting agricultural and food industries in transitioning to sustainable models through customized digital solutions |
107 |
| 10 |
ASSIA, plateforme Santé & Assuranceassia.fr
French group providing innovative, secure health and insurance products via a modular SaaS platform for social protection actors. |
87 |
| 11 |
Dolmendolmen-tech.com
Since 2011, a company helps various retail stores with their customer knowledge strategy, offering a digital platform that collects and manages customer data in compliance with GDPR |
80 |
| 12 | 60 | |
| 13 | 57 | |
| 14 |
Follow Healthfollow.fr
Follow is a healthcare company in Europe that provides doctors and surgeons with a smart solution to manage patient records efficiently, improving patient health |
53 |
| 15 | 51 | |
| 16 |
Cervvalcervval.com
The company develops interactive simulation tools to replicate complex issues and analyze ecosystems, aiding decision-making processes from various perspectives |
48 |
| 17 | 47 | |
| 18 |
My DSO Managermydsomanager.com
Global SaaS platform modernizes and streamlines credit management for mid-market and enterprise organizations, accelerating cash flow, reducing risk, and improving team collaboration globally. |
34 |
| 19 |
RTsys Monitoring Solutions (ex Neotek)neotek-web.com
French company specializing in marine environmental protection through distribution of advanced scientific equipment and modern technologies for industry, offering services including equipment rental, turnkey operations, maintenance, and repair |
33 |
| 20 |
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 |
26 |
| 21 |
S4E - Energysofts4e-software.com
Designs, develops, and operates a monitoring platform for photovoltaic and wind power installations, centralizing data for efficient management and optimized maintenance. |
25 |
| 22 |
KERMAPkermap.com
Specializes in satellite image processing, geographic information production. Offers decision support, territory monitoring solutions, combining thematic expertise, artificial intelligence, and user-friendliness. |
22 |
| 23 |
MOOVENCYmoovency.com
A company founded in 2018 in Rennes specializing in quantifying musculoskeletal risks through innovative solutions and analysis tools |
20 |
| 24 |
Sensing Visionsensingvision.com
Sensing Vision optimizes building operating costs through non-intrusive, cost-effective measurement solutions, personalized insights, data security, using IoT, AI, cloud, and open data technologies |
19 |
| 25 |
Hytech-imaginghytech-imaging.fr
Designs, operates, processes, and deploys spectral imaging systems and software for environmental mapping and monitoring in civil and defense applications. |
14 |
| 26 |
Semsoft | LESTR solutionlestr.app
A French technology company specializing in data fusion and artificial intelligence, focusing on trade risk intelligence software to combat criminal activity in international trade |
14 |
| 27 |
Quanteo Groupquanteo-group.com
Investment management company based in Lannion, Bretagne, France, specializing in managing investment portfolios and financial assets for clients. |
14 |
| 28 | 12 | |
| 29 |
PROSPERENCESprosperences.fr
Specializing in collecting and analyzing data on the housing sector, the company develops digital tools to measure markets accurately and geographically |
10 |
| 30 |
Energiency by epsaenergiency.com
Innovative industrial energy performance analytics software combining big data, cloud, and AI to help manufacturing companies achieve up to 20% energy savings without Capex |
6 |
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 Oct 24, 2026.
More company lists in Brittany
- The largest companies in Brittany 2,535
- Retail chains in Brittany 321
- Manufacturers in Brittany 209
- Family-owned companies in Brittany 190
- Food and Beverage Manufacturing companies in Brittany 165
- Public sector organisations in Brittany 151
- Software Development companies in Brittany 123
- Distributors and wholesalers in Brittany 119
- SaaS companies in Brittany 119
- Consumer goods companies in Brittany 112
- Critical infrastructure operators in Brittany 110
- Food and beverage companies in Brittany 110
- Retail companies in Brittany 96
- IT services companies in Brittany 96
- Contract manufacturers in Brittany 88
- Healthcare providers in Brittany 84
- IT Services and IT Consulting companies in Brittany 81
- Hardware manufacturers in Brittany 77
- Financial services firms in Brittany 73
- Accounting firms in Brittany 72
- Government Administration companies in Brittany 71
- Accounting companies in Brittany 69
- Consulting firms in Brittany 68
- Construction companies in Brittany 65
The same list elsewhere in France
- Data and analytics companies in France 1,169
- Data and analytics companies in Île-de-France 736
- Data and analytics companies in Auvergne-Rhône-Alpes 96
- Data and analytics companies in Occitanie 64
- Data and analytics companies in Provence-Alpes-Côte d'Azur 60
- Data and analytics companies in Hauts-de-France 47
- Data and analytics companies in Nouvelle-Aquitaine 35
- Data and analytics companies in Pays de la Loire 32
- Data and analytics companies in Paris 534
- Data and analytics companies in Lyon 43
- Data and analytics companies in Boulogne-Billancourt 28
- Data and analytics companies in Toulouse 28