# The 26 largest companies in Challans

Tamtam tracks 26 companies headquartered in Challans. This list ranks all of them by number of employees on LinkedIn, led by SERBA, FAIRSON and PROCESS THERMOPLASTIC. Their median headcount is 27. Half of them were founded in 1992 or later.

The companies in Challans primarily operate in the construction sector, wholesale building materials, and manufacturing, with a mix of established firms and medium-sized enterprises. SERBA specializes in structural concrete design for buildings and infrastructure. HUET Portes et Fenêtres designs, manufactures, and distributes doors and windows. PROCESS THERMOPLASTIC focuses on transforming plastic and composite parts. FAIRSON provides outsourced inventory services.

A notable pattern among these companies is the prevalence of businesses founded between the 1980s and 1990s, indicating a period of significant economic development in the region. Many of these companies have been operating for several decades, suggesting a stable business environment.

🇫🇷 Challans · 26 companies · Updated Nov 11, 2026

| # | Company | Industry | Headquarters | Employees | Founded |
|---|---|---|---|---|---|
| 1 | [SERBA](https://www.tamtam.ai/c/serba) (novam-ingenierie.com)<br>Specializing in structural concrete design for buildings and infrastructure, offering 40 years of experience in all stages from conception to execution, including BIM management and diagnostics | Construction | 🇫🇷 Challans | 497 | 1981 |
| 2 | [FAIRSON](https://www.tamtam.ai/c/fairson) (fairson.fr)<br>Specializing in outsourced inventory since 1995, we provide a positive and personal experience for over 200 renowned brands in 25 countries | Transportation, Logistics, Supply Chain and Storage | 🇫🇷 Challans | 263 | 1995 |
| 3 | [PROCESS THERMOPLASTIC](https://www.tamtam.ai/c/process-thermoplastic) (process.fr)<br>Company specializes in transforming plastic and composite parts, offering comprehensive, customized services from design and prototyping to production, assembly, and logistics solutions. | Plastics Manufacturing | 🇫🇷 Challans | 164 | 1990 |
| 4 | [HUET Portes et Fenêtres](https://www.tamtam.ai/c/huet-portes-et-fenetres) (huet.fr)<br>French company, almost 80 years family history, designs, manufactures, and distributes high-quality, innovative doors and windows with advanced expertise. | Wholesale Building Materials | 🇫🇷 Challans | 142 | 1945 |
| 5 | [Groupe HUET](https://www.tamtam.ai/c/groupe-huet) (huet.fr)<br>Designing, manufacturing, and distributing multi-material windows, doors, and stairs for homes and commercial buildings, with a focus on innovation, responsible commitment, and performance. | Wholesale Building Materials | 🇫🇷 Challans | 97 | 1945 |
| 6 | [ESPACE TECHNOLOGIE](https://www.tamtam.ai/c/espace-technologie) (espace-technologie.com)<br>Provides IT solutions, networks, hardware, security, internet, application development, management software, ERP, telecom, and data center services for businesses. | IT Services and IT Consulting | 🇫🇷 Challans | 60 | 1993 |
| 7 | [Hyper U Challans](https://www.tamtam.ai/c/hyper-u-challans) (magasins-u.com)<br>Welcome to our page! Discover our services and products tailored to meet your needs Join us on our journey! | Retail Groceries | 🇫🇷 Challans | 60 | 1990 |
| 8 | [Ville de Challans](https://www.tamtam.ai/c/ville-de-challans) (challans.fr)<br>Located in the heart of Marais Breton, Challans is a dynamic economic hub with a thriving market culture, driving economic growth since the 19th century | Government Administration | 🇫🇷 Challans | 56 |  |
| 9 | [NOVAM Ingénierie](https://www.tamtam.ai/c/novam-ingenierie) (novam-ingenierie.com)<br>NOVAM INGÉNIERIE is a group of eight engineering firms with over 190 skilled professionals, offering multidisciplinary services in construction, environment, and development | Construction | 🇫🇷 Challans | 44 | 2016 |
| 10 | [CERO](https://www.tamtam.ai/c/cero-challans) (cero.fr)<br>Specializing in designing, manufacturing, testing, and maintaining molds for the thermoplastic and composite industry | Machinery Manufacturing | 🇫🇷 Challans | 32 | 1984 |
| 11 | [NORMEC AVIMAR](https://www.tamtam.ai/c/normec-avimar) (avimar.fr)<br>A French company specializing in laboratory services | Biotechnology Research | 🇫🇷 Challans | 31 | 1986 |
| 12 | [E.Leclerc Challans](https://www.tamtam.ai/c/e-leclerc-challans) (e.leclerc)<br>A network of 662 independent stores in France, part of a leading distribution group with €434 billion in sales, known for innovation and growth | Retail Groceries | 🇫🇷 Challans | 28 | 1992 |
| 13 | [AIMA GROUPE](https://www.tamtam.ai/c/aima-groupe) (aima-groupe.fr)<br>Specializing in supplying agricultural and gardening equipment, providing a wide selection of top brands, along with maintenance, repairs, and post-sales service | Machinery Manufacturing | 🇫🇷 Challans | 27 | 1966 |
| 14 | [Batidoc - CDE Négoce](https://www.tamtam.ai/c/batidoc-cde-negoce) (cdenegoce.fr)<br>A leading distributor of wood products and building materials in Loire-Atlantique and Maine-et-Loire, offering expertise in renovation and construction projects | Wholesale Building Materials | 🇫🇷 Challans | 23 | 1988 |
| 15 | [VRIGNAUD ET BIRON IMMOBILIER](https://www.tamtam.ai/c/vrignaud-et-biron-immobilier) (vrignaudbiron.com)<br>A family-owned real estate agency founded in 1973 with 4 locations offering a range of services including transactions, rentals, property management, and seasonal rentals | Real Estate | 🇫🇷 Challans | 17 | 1973 |
| 16 | [Solog](https://www.tamtam.ai/c/solog) (solog-tech.com)<br>development of custom software solutions for field professionals, including building, maintenance, and service industries, with mobile management tools | Software Development | 🇫🇷 Challans | 17 | 2009 |
| 17 | [SEJOURNE](https://www.tamtam.ai/c/sejourne) (sejourne.fr)<br>The company specializes in providing comprehensive expertise in electricity, hydraulics, thermal, and solar energy for industries like food, hospitality, and more Join for innovative projects | Industrial Machinery Manufacturing | 🇫🇷 Challans | 16 | 1968 |
| 18 | [PG Software Europe](https://www.tamtam.ai/c/pg-software-europe) (pgsoftware.fr)<br>A reliable IT partner offering high-level software solutions in areas such as IT service management, asset management, IT security, and more Join over 2000 satisfied customers! | IT Services and IT Consulting | 🇫🇷 Challans | 15 | 1997 |
| 19 | [SIIUM by Square System](https://www.tamtam.ai/c/siium-by-square-system) (siium.fr)<br>SIIUM reinvents global IT systems through cloud expertise, hyperconvergence, security, datacenter hosting, and collaborative platforms, supporting businesses with partners and certifications | IT Services and IT Consulting | 🇫🇷 Challans | 13 | 2013 |
| 20 | [AI Robotics France](https://www.tamtam.ai/c/ai-robotics-france) (airobotics.fr)<br>Develops innovative robotics solutions integrating artificial intelligence, computer vision, and collaborative robotics to improve business efficiency and productivity. | Robotics Engineering | 🇫🇷 Challans | 9 | 2023 |
| 21 | [CNA DECOBOIS](https://www.tamtam.ai/c/cna-decobois) (cna-decobois.com)<br>Specializing in custom woodworking for both individuals and businesses, offering tailored solutions for various sectors such as retail, hospitality, and healthcare | Furniture and Home Furnishings Manufacturing | 🇫🇷 Challans | 6 | 2007 |
| 22 | [Atlantic Communication Challans](https://www.tamtam.ai/c/atlantic-communication-challans) (atlantic-communication.fr)<br>Atlantic Communication offers comprehensive advertising services including graphic design, printing, and technical installation on various platforms They specialize in various visual products and branding solutions | Printing Services | 🇫🇷 Challans | 5 | 2005 |
| 23 | [227 AVENUE](https://www.tamtam.ai/c/227-avenue) (227avenue.com)<br>A magazine dedicated to decoration and lifestyle, highlighting professionals in the Vendée region Offers products and services in the home and habitat sectors | Newspaper Publishing | 🇫🇷 Challans | 4 | 2012 |
| 24 | [Notaires Office Challans Palluau - Me Lucas & Me Eon & Me Potin](https://www.tamtam.ai/c/notaires-office-challans-palluau-me-lucas-and-me-eon-and-me-potin) (notaires.fr)<br>Notaires Office offers comprehensive legal services for individuals and businesses, specializing in family law, real estate, agriculture, business law, and government support | Legal Services | 🇫🇷 Challans | 4 |  |
| 25 | [Café Ôm'ri](https://www.tamtam.ai/c/cafe-om-ri) (cafe-omri.com)<br>Artisanal coffee roaster, selecting and roasting quality beans from recognized origins, sold to individuals and professionals seeking authentic coffee. | Retail Groceries | 🇫🇷 Challans | 3 |  |
| 26 | [CELLEFI](https://www.tamtam.ai/c/cellefi)<br>Business consulting firm offering personalized support to professionals with tools for decision-making, process analysis, and investment project studies Registered with Order of Chartered Accountants | Business Consulting and Services | 🇫🇷 Challans | 3 | 2015 |

## 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 11, 2026.

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Source: https://www.tamtam.ai/l/largest-companies-challans