These companies are primarily public sector bodies and environmental service providers located across Brittany. The list includes large metropolitan administrations such as Rennes Ville et Métropole, which fosters economic and urban development, and Brest Métropole, an urban community anchoring a region of 90 towns. Key environmental players like EMO specialize in water and sludge treatment, while Labocéa offers multidisciplinary analysis services in health, environment, and agri-food sectors. GUYOT environnement focuses on promoting a circular economy through waste collection and recycling.
A significant pattern within this selection is the prevalence of government administration entities, indicating a strong public sector presence in Brittany's largest employers. These organizations, often founded in the 21st century like Saint-Brieuc Armor Agglomération and Dinan Agglomération, are dedicated to regional development, public service management, and supporting local businesses.
| # | Company | Employees | |||
|---|---|---|---|---|---|
| 1 |
Rennes Ville et Métropolerennes.fr
Fosters economic, urban development, attracting talent and students. Provides diverse public services through 5300 agents, focusing on quality of life and professional growth. |
1,828 | |||
| 2 |
Brest Métropolebrest.fr
Brest métropole océane is a voluntary urban community in western Brittany, anchoring a region with 90 towns and 300,000 residents |
1,072 | |||
| 3 |
Groupe PIGEONgroupe-pigeon.com
Independent family group involved in territorial development in the western region, focusing on urban planning and infrastructure projects |
526 | |||
| 4 |
EMOemo-france.com
Global provider of customized water and sludge treatment solutions for wastewater, drinking water, and industrial effluents with a dedicated in-house laboratory and worldwide distribution network |
463 | |||
| 5 |
Saint-Brieuc Armor Agglomérationsaintbrieuc-armor-agglo.bzh
In the heart of Northern Brittany, Saint-Brieuc Armor Agglomération fosters innovation and research, offering financial aid and support to local businesses for economic growth |
452 | |||
| 6 |
Cap l'Orient agglomérationlorient-agglo.bzh
Group of 19 communes collaborating to create a dynamic, ambitious, and sustainable territory focused on community and quality of life. |
334 | |||
| 7 |
Labocéalabocea.fr
A multidisciplinary team in Brittany providing analysis services in health, environment, and agri-food sectors, offering sampling, laboratory testing, advice, and expertise with transparency and reliability |
313 | |||
| 8 |
GUYOT environnementguyotenvironnement.com
A leading environmental company with 400 employees dedicated to promoting a circular economy by collecting, sorting, and recycling waste materials efficiently |
212 | |||
| 9 |
Dinan Agglomérationdinan-agglomeration.fr
Management and development of a large intercommunal area in Northern Brittany, covering 65 communes and serving over 100,000 residents. |
208 | |||
| 10 |
Golfe du Morbihan - Vannes agglomérationgolfedumorbihan-vannesagglomeration.bzh
Coordination and management of public services and development across 34 municipalities formed by merging three local communities. |
207 | |||
| 11 |
Auray Quiberon Terre Atlantiqueauray-quiberon.fr
Support sustainable development of urban, rural, and coastal areas, economic growth, tourism, environment, housing, mobility, culture, and social services. |
150 | |||
| 12 |
SAINT-MALO AGGLOMÉRATION (Coopération intercommunale)stmalo-agglomeration.fr
Coordination of economic growth, tourism promotion, urban planning, social housing, transport, environmental protection, waste management, and sports facilities development. |
147 | |||
| 13 |
SPL EAU DU BASSIN RENNAISeaudubassinrennais.fr
Public local company managing water production and distribution for 470,000 residents across multiple municipalities in Rennes area with 140 employees. |
143 | |||
| 14 | 134 | ||||
| 15 |
Les Gars des Eauxlesgarsdeseaux.com
A national expert in non-destructive leak detection and network detection, offering services for water leaks and infrastructure diagnostics |
125 | |||
| 16 |
SARC Société ARmoricaine de Canalisationssarcouest.fr
Specializes in potable water supply and sewer pipeline installation with over 40 years of expertise and strong commitment to sustainability. |
123 | |||
| 17 |
Premier Tech Eau et Environnement - Francepremiertechaqua.com
Specializes in water treatment, non-collective sanitation, water storage, and rainwater recovery with innovative, ready-to-install solutions for various clients. |
105 | |||
| 18 |
Triborde-tribord.com
An insertion company specializing in environmental sector and waste management, operating in various territories in Brittany, Loire-Atlantique, and Manche |
77 | |||
| 19 |
OCENE Internationalocene-industrie.fr
Specialist in water treatment, hygiene, and environmental solutions for agriculture, industry, and communities nationally and internationally, focusing on performance, innovation, and sustainability |
70 | |||
| 20 |
SPHERE-THEAUDsphere-theaud.fr
From waste collection to recycling, we provide sustainable solutions for communities, businesses, and individuals while preserving our teams and natural resources |
61 | |||
| 21 |
COLLECTIVITE EAU DU BASSIN RENNAISeaudubassinrennais-collectivite.fr
An utilities company in Rennes, France, focused on water management in the region of Bassin Rennais |
57 | |||
| 22 |
AQUATIRISaquatiris.com
An international network specializing in eco-friendly domestic waste water treatment systems, designing and creating reed beds without septic tanks |
56 | |||
| 23 |
Dervenndervenn.com
A pioneering community of companies founded in 2002, specializing in ecological engineering and biodiversity preservation with a national reach in France |
55 | |||
| 24 |
HPC Envirotec SAShpc.ag
An environmental engineering company specializing in land recycling, consultancy, and infrastructure planning, part of a global alliance offering environmental services worldwide |
54 | |||
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. | |||||
| 25 |
GES - Conseil indépendant en Environnementges-sa.fr
Specialized in water, environmental, and industrial research, GES provides consulting services to industries, local communities, and agricultural operations, with offices throughout France |
53 | |||
| 26 |
Anticimex Franceanticimex.fr
Global provider of innovative, eco-friendly pest control solutions focused on preventive measures to ensure safer, healthier environments worldwide. |
53 | |||
| 27 |
FORAFRANCEforafrance.fr
Specialists in water treatment for industries, providing tailored solutions from design to maintenance worldwide, focusing on ecological and economic realities |
52 | |||
| 28 |
Veolia Recyclage & Valorisation des Déchets - Bretagneveolia.fr
The company transforms waste into new resources, following a circular economy approach to tackle the scarcity of natural resources |
50 | |||
| 29 |
La Feuille d'Érablefeuille-erable.fr
Collection, sorting, and recycling of business waste including paper, cardboard, office waste, and other materials across Brittany region. |
43 | |||
| 30 |
EcoTree Franceecotree.green
European leader in Nature-based Solutions, EcoTree enables individuals and businesses to support ecosystem projects for environmental protection and restoration in Europe |
40 | |||
| 31 |
Groupe Ressources T | Envie Bretagneressources-t.org
Provides inclusive employment through specialized recycling, reconditioning, transport, and waste management services supporting social and economic inclusion in Brittany. |
40 | |||
| 32 |
Susty Wastes Solutionssustywastes.com
Designing, building, and upgrading waste sorting centers for recycling purposes |
35 | |||
| 33 |
COMMUNAUTE DE COMMUNES ARC SUD BRETAGNEarc-sud-bretagne.fr
Government administration company in Bretagne, France managing the community and services of the ARC SUD region |
30 | |||
| 34 |
Energy &+energy.bzh
Specialized in energy solutions from biomass, offering design, installation, operation, maintenance, and optimization services for industrial, collective, and agricultural markets |
29 | |||
| 35 | 28 | ||||
| 36 |
Recycleurs Bretonsrecycleurs-bretons.fr
Environmental services company specializing in recycling based in France, focused on promoting sustainability and eco-friendly practices in the region |
17 | |||
| 37 |
Pandobacpandobac.com
Offers reusable packaging solutions to businesses and communities, replacing single-use food containers, saving costs, space, and promoting eco-friendly logistics. |
16 | |||
| 38 | 12 | ||||
| 39 |
DBO Francedbofrance.com
DBO France distributes System O)) wastewater treatment solutions in France, promoting environmentally friendly products that are proven, low maintenance, and adaptable |
11 | |||
| 40 |
Maitréamaitrea.fr
A key player in energy transition, offering waste treatment, local material valorization, and decarbonized energy production for businesses and communities Seeking ambitious individuals |
11 | |||
| 41 |
Enerpro Biogazenerpro-biogaz.fr
Enerpro Biogaz specializes in decentralized methanization to convert organic waste into biogas and natural fertilizer at agricultural and agro-industrial sites Visit their website for more information |
10 | |||
| 42 |
REGIE MALOUINE DE L'EAUrme.saint-malo.fr
A French utilities company based in St Malo, specializing in water management services |
9 | |||
| 43 |
SURPLUS AUTOsurplusauto.fr
Automotive recycling center founded in 1989, focused on long-term stability and a strategic approach for sustainable business activities |
9 | |||
| 44 |
SOCIETE HYDRO'ENVIRONNEMENThydro-environnement.fr
Innovative company specializing in water treatment solutions for industries, municipalities, and businesses, focusing on water resource preservation and environmental protection |
7 | |||
| 45 |
Susty Wastes Solutions Energysustywastes.com
The company specializes in designing, constructing, and setting up waste treatment facilities for energy production through composting, anaerobic digestion, and biomass conversion |
7 | |||
| 46 |
TELLUS Environmenttellus-environment.com
A company founded in 2012 offering innovative ground and underground 3D mapping services for various markets, focusing on security, environmental impact, and cost savings |
6 | |||
| 47 |
SLC-Société Lannionnaise de Canalisationsslc-reseaux.bzh
Located near Lannion in Côtes d'Armor, the company specializes in water and sanitation services for public and private clients in the area |
5 | |||
| 48 |
Le Rheu Environment Companylrenvironment.com
A specialized waste management and recycling company in France, offering services in paper, plastic, electronic waste handling, and metals recycling |
2 | |||
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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 11, 2026.
More company lists in Brittany
- The largest companies in Brittany 3,058
- Companies with in-house R&D in Brittany 366
- Retail chains in Brittany 344
- Manufacturers in Brittany 307
- Multinational companies in Brittany 264
- Family-owned companies in Brittany 201
- Food and Beverage Manufacturing companies in Brittany 182
- Professional services firms in Brittany 167
- Public sector organisations in Brittany 165
- Hardware manufacturers in Brittany 148
- Distributors and wholesalers in Brittany 145
- Software Development companies in Brittany 132
- Food and beverage companies in Brittany 130
- SaaS companies in Brittany 128
- Critical infrastructure operators in Brittany 120
- Consumer goods companies in Brittany 115
- IT services companies in Brittany 113
- Education providers in Brittany 112
- Agriculture companies in Brittany 108
- Retail companies in Brittany 107
- IT Services and IT Consulting companies in Brittany 101
- Consulting firms in Brittany 99
- Healthcare providers in Brittany 97
- Contract manufacturers in Brittany 93
The same list elsewhere in France
- Environmental services companies in Île-de-France 336
- Environmental services companies in Auvergne-Rhône-Alpes 173
- Environmental services companies in Provence-Alpes-Côte d'Azur 108
- Environmental services companies in Grand Est 100
- Environmental services companies in Nouvelle-Aquitaine 92
- Environmental services companies in Hauts-de-France 87
- Environmental services companies in Occitanie 78
- Environmental services companies in the Hauts-de-Seine department 70
- Environmental services companies in the Rhône department 64
- Environmental services companies in the Bouches-du-Rhône department 60
- Environmental services companies in Pays de la Loire 59
- Environmental services companies in the Nord department 47
- Environmental services companies in Normandy 45
- Environmental services companies in Bourgogne-Franche-Comté 38
- Environmental services companies in the Yvelines department 35
- Environmental services companies in the Seine-Saint-Denis department 34
- Environmental services companies in the Gironde department 32
- Environmental services companies in the Essonne department 27
- Environmental services companies in the Val-de-Marne department 26
- Environmental services companies in the Isère department 25
- Environmental services companies in Paris 87