| # | Company | Employees |
|---|---|---|
| 1 |
Ekinopsekinops.com
Provides open, trusted, and innovative network connectivity solutions. Delivers high value-added software-driven solutions for optical transport and virtualized managed enterprise services. |
509 |
| 2 |
LUMIBIRD : the specialist in laser technologieslumibird.com
Company designs, manufactures, and markets high-performance lasers for industrial, scientific, medical, and defense markets globally, leveraging 50 years of experience in laser technologies. |
497 |
| 3 |
IUT Lannionuniv-rennes.fr
A component of University of Rennes, the Institute provides education, research, and technology transfer in fields like IT, communication, multimedia, and telecommunications |
141 |
| 4 |
Quantel laser by LUMIBIRDquantel-laser.com
A leading specialist in lasers, offering high-performance solid-state, fiber, and diode lasers for industrial, scientific, defense, space, and medical applications worldwide |
137 |
| 5 |
Eco-Countereco-compteur.com
Specializes in collecting and analyzing pedestrian and bicycle traffic data, offering hardware, software, and professional services worldwide. |
136 |
| 6 |
Keopsys by LUMIBIRDkeopsys.com
Design and manufacture of high performance fiber lasers and amplifiers for scientific, industrial, defense, and medical applications including LiDAR and satellite communications. |
95 |
| 7 |
Idea Opticalidea-optical.com
Provider of optical fiber components and systems for telecoms, energy, and rail sectors, leveraging French industrial expertise. |
78 |
| 8 |
Emeraude i.d.emeraude-id.fr
Emeraude id is a social enterprise supporting individuals in social and professional difficulty, focusing on employment for people with disabilities |
74 |
| 9 |
Endro Cosmetiquesendro-cosmetiques.com
Artisanal Breton company offering simple, natural, and eco-friendly beauty and hygiene products, trusted by over 200,000 customers. |
51 |
| 10 |
Novatech Industriesnovatech-groupe.com
Designer, Manufacturer, and Integrator of Electronic Solutions and Products Your Partner in Innovation |
38 |
| 11 |
COM.PERFORMANCEScomperformances.fr
COMPERFORMANCES supports small businesses, artisans, traders, and freelancers with their digital communication strategies |
38 |
| 12 |
Apizeeapizee.com
Apizee provides visual engagement solutions for companies, enabling personalized remote support and redefining customer interactions through secure and authentic experiences |
38 |
| 13 |
3D OUEST3douest.com
A company based in Lannion, France, specializing in providing tailored software solutions and support for municipalities to optimize their public services |
27 |
| 14 |
Photonics Bretagne - Photonics Innovation Hubphotonics-bretagne.com
Support innovation and industrial growth in photonics through a cluster and RTO specializing in specialty optical fibers and components. |
23 |
| 15 |
Orange Lannionorange.com
The company in Lannion specializes in various expertise areas such as development, mobile banking, AI, cybersecurity, 5G, digitalization, and serving businesses It collaborates with a rich local ecosystem |
23 |
| 16 |
PROLANN SRMPprolann.fr
Specializes in high-precision mechanical parts machining, including fixation systems, hyperfrequency components, assemblies, and friction stir welding processes. |
17 |
| 17 |
APITICapitic.com
APITIC develops and markets web software for businesses, offering order kiosk, wifi orders, connected cash register, advanced statistics dashboard, and more |
17 |
| 18 |
Quanteo Groupquanteo-group.com
Investment management company based in Lannion, Bretagne, France, specializing in managing investment portfolios and financial assets for clients. |
14 |
| 19 |
E.Leclerc Lannionfacebook.com
A company committed to democratizing consumption, improving purchasing power, breaking monopolies, supporting local producers, and preserving the environment through various initiatives |
11 |
| 20 |
ODYCEAodycea-france.com
A French supplier discovering and utilizing unique bio-inspired active substances from plants in extreme environments for innovative, scientifically proven dermatological solutions, many patented |
8 |
| 21 |
TOMPAEROtompaero.com
Introducing an AI-powered, modular mid-size cargo eVTOL UAV. This is a new product for air cargo transport. |
7 |
| 22 |
FC EQUIPMENTSfc-equipments.com
A leading specialist in France for buying, integrating, selling, and renting Test & Measurement equipment since 2003, with a vast stock of new and used gear |
6 |
| 23 |
Armor Arsenalarmor-arsenal.com
Ruggedized, precision-engineered flow control technologies for defense and aerospace systems, designed for ground operations, orbital missions, and various challenging modern environments. |
6 |
| 24 |
Solstyssolstys.com
Specializing in custom business software and mobile app development, from prototype to delivery, offering turnkey services including needs analysis, integration, support, and maintenance |
5 |
| 25 |
SEISMO WAVEseismowave.com
Specializing in infrasound sensors for research, security, and prevention applications worldwide Expertise in extreme atmospheric event detection with high-precision sensors Headquarters in Lannion, France |
3 |
| 26 |
adamex Expertise Comptableadamex.fr
An expert accounting firm specializing in advising and managing accounting, legal, and tax matters for small and medium-sized businesses, professionals, and innovative companies |
2 |
| 27 |
MAISONS HIETALAmaisons-hietala.com
A building materials company located in Lannion, France, specializing in providing construction materials and solutions for various projects |
2 |
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.
The same list elsewhere in France
- The largest companies in France 75,805
- The largest companies in 脦le-de-France 30,863
- The largest companies in Auvergne-Rh么ne-Alpes 8,971
- The largest companies in Provence-Alpes-C么te d'Azur 5,836
- The largest companies in Occitanie 4,823
- The largest companies in Grand Est 4,506
- The largest companies in Nouvelle-Aquitaine 4,424
- The largest companies in Hauts-de-France 3,752
- The largest companies in Pays de la Loire 3,573
- The largest companies in Brittany 2,535
- The largest companies in Normandy 1,814
- The largest companies in Bourgogne-Franche-Comt茅 1,549
- The largest companies in Centre-Val de Loire 1,385
- The largest companies in Paris 19,499
- The largest companies in Lyon 2,238
- The largest companies in Marseille 1,366
- The largest companies in Toulouse 1,331
- The largest companies in Bordeaux 928
- The largest companies in Nantes 796
- The largest companies in Lille 731
- The largest companies in Boulogne-Billancourt 701
- The largest companies in Montpellier 633
- The largest companies in Aix-en-Provence 571
- The largest companies in Strasbourg 547