# 30 leading companies with a mobile app in the Loire-Atlantique department Tamtam tracks 46 companies with a mobile app headquartered in the Loire-Atlantique department. This list ranks the 30 largest by number of employees on LinkedIn, led by Nantes Métropole, Caisse d'Epargne Bretagne Pays de Loire and Credit Agricole Atlantique Vendee. Their median headcount is 202. Half of them were founded in 2011 or later. The most common headquarters are Nantes (20), Saint-Herblain (3) and Carquefou (2). These companies with a mobile app in Loire-Atlantique are mostly large and mid-sized firms, with a notable presence of banking, government administration, and technology companies. Nantes Métropole, with 2524 employees, is a local government organization. Caisse d'Epargne Bretagne Pays de Loire (2428 employees) and Credit Agricole Atlantique Vendee (1851 employees) are regional banks. Gens de Confiance (321 employees) is an online marketplace, and Obat (274 employees) develops invoicing software for construction. Santerclair (277 employees) provides healthcare advice and cost management services. The data shows a strong concentration of headquarters in Nantes, with 9 out of the 15 companies located there. The companies range in founding year from 1943 (FC Nantes) to 2019 (Obat), indicating a mix of established institutions and younger technology firms. Banking and financial services are particularly well represented. 🇫🇷 Loire-Atlantique · 30 companies · Updated Nov 13, 2026 | # | Company | Industry | Headquarters | Employees | Founded | |---|---|---|---|---|---| | 1 | [Nantes Métropole](https://www.tamtam.ai/c/nantes-metropole) (linktr.ee)
This organization in Nantes and its metropolitan area aims to create a new development model, embracing solidarity, collaboration, creativity, and openness They provide updates on local news | Government Administration | 🇫🇷 Nantes | 2,524 | 2004 | | 2 | [Caisse d'Epargne Bretagne Pays de Loire](https://www.tamtam.ai/c/caisse-d-epargne-bretagne-pays-de-loire) (caisse-epargne.fr)
Regional mutualist bank with 420 agencies, serving individuals and professionals, supporting local economy through business centers and specialized subsidiaries. | Banking | 🇫🇷 Orvault | 2,428 | | | 3 | [Credit Agricole Atlantique Vendee](https://www.tamtam.ai/c/credit-agricole-atlantique-vendee) (credit-agricole.fr)
A cooperative bank supporting local economic development in Loire-Atlantique and Vendée, focusing on human-centered long-term vision with a successful dynamic | Banking | 🇫🇷 Nantes | 1,851 | | | 4 | [Warehouse Nantes](https://www.tamtam.ai/c/warehouse-nantes) (warehouse-nantes.fr)
Hybrid cultural space hosting concerts and club nights with eclectic music programming alongside professional corporate events like conferences, cocktails, and private seminars. | Events Services | 🇫🇷 Nantes | 1,494 | 2017 | | 5 | [CIC Ouest](https://www.tamtam.ai/c/cic-ouest) (cic.fr)
A solidary and responsible bank in Western France, supporting regional projects for a more just and sustainable society Emphasizes innovation, proximity, and employee satisfaction | Banking | 🇫🇷 Nantes | 1,476 | | | 6 | [Département de Loire-Atlantique](https://www.tamtam.ai/c/departement-de-loire-atlantique) (loire-atlantique.fr)
Provides local government administration and public services for the Loire-Atlantique region, managing community needs and regional development. | Government Administration | 🇫🇷 Nantes | 1,437 | | | 7 | [Semitan](https://www.tamtam.ai/c/semitan) (semitan.fr)
A public-private entity managing public transport in Nantes, overseeing network construction, renovation, and coordination of all mobility services in the region | Urban Transit Services | 🇫🇷 Nantes | 727 | 1979 | | 8 | [Crédit Mutuel Loire Atlantique Centre Ouest](https://www.tamtam.ai/c/credit-mutuel-loire-atlantique-centre-ouest) (creditmutuel.fr)
Offers banking, insurance, mobile, automotive, and real estate services to individuals, businesses, and associations, supporting local projects and economy. | Banking | 🇫🇷 Nantes | 525 | | | 9 | [FC Nantes](https://www.tamtam.ai/c/fc-nantes) (fcnantes.com)
Professional football club with multiple French championships and cups, hosting matches at Stade de la Beaujoire with VIP services. | Spectator Sports | 🇫🇷 La Chapelle-sur-Erdre | 388 | 1943 | | 10 | [AS 24](https://www.tamtam.ai/c/as-24) (as24.com)
Specialized fuel distribution network for heavy goods vehicles across 29 countries, offering secure transactions, competitive prices, and dedicated stations. | Oil and Gas | 🇫🇷 Saint-Herblain | 380 | 1988 | | 11 | [Gens de Confiance](https://www.tamtam.ai/c/gens-de-confiance) (gensdeconfiance.com)
Gens de Confiance is a recommendation-based online marketplace for buying, selling, and renting items safely, with exclusive listings and no scams reported in 5 years | Technology, Information and Internet | 🇫🇷 Nantes | 321 | 2014 | | 12 | [SANTECLAIR](https://www.tamtam.ai/c/santeclair) (santeclair.fr)
Providing quality healthcare advice and cost management services to insurance partners, improving access and efficiency for millions insured. | Insurance | 🇫🇷 Nantes | 277 | 2003 | | 13 | [Obat](https://www.tamtam.ai/c/obat) (obat.fr)
Specialized invoicing software designed for contractors and self-employed individuals within the construction sector Streamlining financial processes and improving efficiency | Software Development | 🇫🇷 Nantes | 274 | 2019 | | 14 | [Lumiplan](https://www.tamtam.ai/c/lumiplan) (lumiplan.com)
The company provides electronic display systems for various locations to showcase messages in real-time, enhancing communication and ambiance | Technology, Information and Media | 🇫🇷 Saint-Herblain | 252 | 1972 | | 15 | [Shopopop](https://www.tamtam.ai/c/shopopop) (shopopop.com)
Connects individuals for grocery pickups, deliveries, creates social links, boosts purchasing power, reduces carbon footprint for retailers. | Transportation, Logistics, Supply Chain and Storage | 🇫🇷 Nantes | 202 | 2015 | | 16 | [IMA PROTECT](https://www.tamtam.ai/c/ima-protect) (imaprotect.com)
Company provides remote monitoring services to protect families, homes, and valuables, focusing on risk prevention and simplifying security. | Individual and Family Services | 🇫🇷 Nantes | 177 | | | 17 | [CAMPING-CAR PARK](https://www.tamtam.ai/c/camping-car-park) (campingcarpark.com)
Network of over 600 motorhome stopover areas offering 24/7 access, utilities, and support for local authorities and tourists. | Recreational Facilities | 🇫🇷 Pornic | 150 | 2011 | | 18 | [Bois Expo Distribution](https://www.tamtam.ai/c/bois-expo-distribution) (bois-expo.com)
Specializes in outdoor landscaping with over 20 years experience, supporting projects like terraces, carports, garden sheds, and fences. | Retail | 🇫🇷 Carquefou | 96 | 2004 | | 19 | [MyScript](https://www.tamtam.ai/c/myscript) (myscript.com)
Leader in real-time handwriting recognition using AI, offering interactive ink technology for digital content creation across various industries Innovating natural human-machine interfaces | Software Development | 🇫🇷 Nantes | 93 | 1998 | | 20 | [KoralPlay](https://www.tamtam.ai/c/koralplay) (koralplay.com)
An experienced gaming technology partner providing omnichannel solutions, customized games, and comprehensive support for sports betting, gaming, and lottery operators globally | Software Development | 🇫🇷 Nantes | 72 | 2017 | | 21 | [Beem](https://www.tamtam.ai/c/beem-nantes) (beemenergy.fr)
Helping individuals take charge of their energy consumption and accelerate the transition to cleaner energy sources for homes | Solar Electric Power Generation | 🇫🇷 Nantes | 70 | 2018 | | 22 | [Weenat](https://www.tamtam.ai/c/weenat) (weenat.com)
Weenat provides simple, mobile, and connected solutions for farmers, using weather and soil data to optimize decision-making from planting to harvest | Farming | 🇫🇷 Nantes | 69 | 2014 | | 23 | [myKids! La garde d'enfants à domicile](https://www.tamtam.ai/c/mykids-la-garde-d-enfants-a-domicile) (mykids-domicile.fr)
myKids! offers flexible and rewarding opportunities for individuals to work with children, providing childcare services tailored to personal schedules and preferences | Individual and Family Services | 🇫🇷 Nantes | 64 | 2021 | | 24 | [Costructor](https://www.tamtam.ai/c/costructor) (costructor.co)
Costructor is the first all-in-one software for managing construction businesses on mobile or PC, offering comprehensive solutions for the industry | Software Development | 🇫🇷 Nantes | 64 | 2022 | | 25 | [Maison Berjac](https://www.tamtam.ai/c/maison-berjac) (berjac.fr)
Supply food products and tailored services to culinary professionals, supporting passionate experts to deliver quality work with pride. | Food and Beverage Manufacturing | 🇫🇷 Rezé | 62 | 1981 | | 26 | [Prof Express](https://www.tamtam.ai/c/prof-express) (profexpress.com)
remote homework support for students of all levels, paid for by companies or organizations, ensuring equal access to educational assistance nationwide. | E-Learning Providers | 🇫🇷 Sucé-sur-Erdre | 51 | 2007 | | 27 | [Guest Suite](https://www.tamtam.ai/c/guest-suite) (guest-suite.com)
Guest Suite provides a comprehensive solution for managing local visibility through presence and review management, helping brands optimize online information, analyze reputation, and collect and respond to customer reviews | IT Services and IT Consulting | 🇫🇷 Nantes | 48 | 2013 | | 28 | [Sunology](https://www.tamtam.ai/c/sunology) (sunology.eu)
Provider of residential solar solutions including plug-and-play stations, smart custom roofs, modular batteries, and monitoring applications for home energy autonomy and savings. | Retail Appliances, Electrical, and Electronic Equipment | 🇫🇷 Saint-Herblain | 46 | 2019 | | 29 | [Logicmax Technologie](https://www.tamtam.ai/c/logicmax-technologie) (logicmax.com)
Logicmax is a software publisher specializing in management solutions for healthcare professionals, serving over 10,000 practitioners with SESAM Vitale approved software for Apple and Windows | Software Development | 🇫🇷 Nantes | 35 | 1991 | | 30 | [Novotel Nantes Carquefou](https://www.tamtam.ai/c/novotel-nantes-carquefou) (all.accor.com)
A hotel near Nantes offering 92 comfortable rooms, 14 meeting rooms, a heated indoor pool, a restaurant, and a lounge bar for business and leisure events | Hospitality | 🇫🇷 Carquefou | 33 | 1973 | ## 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 13, 2026. ## More company lists in the Loire-Atlantique department - [The largest companies in the Loire-Atlantique department](https://www.tamtam.ai/l/largest-companies-loire-atlantique) (2,044) - [Companies with in-house R&D in the Loire-Atlantique department](https://www.tamtam.ai/l/r-and-d-companies-loire-atlantique) (207) - [Retail chains in the Loire-Atlantique department](https://www.tamtam.ai/l/retail-chains-loire-atlantique) (162) - [Multinational companies in the Loire-Atlantique department](https://www.tamtam.ai/l/multinational-companies-loire-atlantique) (159) - [Professional services firms in the Loire-Atlantique department](https://www.tamtam.ai/l/professional-services-firms-loire-atlantique) (158) - [Software Development companies in the Loire-Atlantique department](https://www.tamtam.ai/l/software-development-companies-loire-atlantique) (137) - [SaaS companies in the Loire-Atlantique department](https://www.tamtam.ai/l/saas-companies-loire-atlantique) (135) - [IT services companies in the Loire-Atlantique department](https://www.tamtam.ai/l/it-services-companies-loire-atlantique) (130) - [Manufacturers in the Loire-Atlantique department](https://www.tamtam.ai/l/manufacturers-loire-atlantique) (125) - [IT Services and IT Consulting companies in the Loire-Atlantique department](https://www.tamtam.ai/l/it-services-and-it-consulting-companies-loire-atlantique) (110) - [Consulting firms in the Loire-Atlantique department](https://www.tamtam.ai/l/consulting-firms-loire-atlantique) (94) - [Distributors and wholesalers in the Loire-Atlantique department](https://www.tamtam.ai/l/distributors-and-wholesalers-loire-atlantique) (94) - [Hardware manufacturers in the Loire-Atlantique department](https://www.tamtam.ai/l/hardware-companies-loire-atlantique) (86) - [Business Consulting and Services companies in the Loire-Atlantique department](https://www.tamtam.ai/l/business-consulting-and-services-companies-loire-atlantique) (83) - [Public sector organisations in the Loire-Atlantique department](https://www.tamtam.ai/l/public-sector-organisations-loire-atlantique) (80) - [Family-owned companies in the Loire-Atlantique department](https://www.tamtam.ai/l/family-owned-companies-loire-atlantique) (71) - [Education providers in the Loire-Atlantique department](https://www.tamtam.ai/l/education-companies-loire-atlantique) (68) - [Real Estate companies in the Loire-Atlantique department](https://www.tamtam.ai/l/real-estate-companies-loire-atlantique) (67) - [Financial services firms in the Loire-Atlantique department](https://www.tamtam.ai/l/financial-services-firms-loire-atlantique) (65) - [Law Practice companies in the Loire-Atlantique department](https://www.tamtam.ai/l/law-practice-companies-loire-atlantique) (62) - [Retail companies in the Loire-Atlantique department](https://www.tamtam.ai/l/retail-companies-loire-atlantique) (61) - [Subscription businesses in the Loire-Atlantique department](https://www.tamtam.ai/l/subscription-businesses-loire-atlantique) (61) - [Critical infrastructure operators in the Loire-Atlantique department](https://www.tamtam.ai/l/critical-infrastructure-operators-loire-atlantique) (58) - [Events Services companies in the Loire-Atlantique department](https://www.tamtam.ai/l/events-services-companies-loire-atlantique) (58) ## The same list elsewhere in France - [Companies with a mobile app in France](https://www.tamtam.ai/l/companies-with-mobile-app-france) (2,270) - [Companies with a mobile app in Île-de-France](https://www.tamtam.ai/l/companies-with-mobile-app-ile-de-france) (1,105) - [Companies with a mobile app in Auvergne-Rhône-Alpes](https://www.tamtam.ai/l/companies-with-mobile-app-auvergne-rhone-alpes) (209) - [Companies with a mobile app in the Hauts-de-Seine department](https://www.tamtam.ai/l/companies-with-mobile-app-hauts-de-seine) (189) - [Companies with a mobile app in Grand Est](https://www.tamtam.ai/l/companies-with-mobile-app-grand-est) (157) - [Companies with a mobile app in Provence-Alpes-Côte d'Azur](https://www.tamtam.ai/l/companies-with-mobile-app-provence-alpes-cote-dazur) (145) - [Companies with a mobile app in Occitanie](https://www.tamtam.ai/l/companies-with-mobile-app-occitanie) (126) - [Companies with a mobile app in Nouvelle-Aquitaine](https://www.tamtam.ai/l/companies-with-mobile-app-nouvelle-aquitaine) (116) - [Companies with a mobile app in Hauts-de-France](https://www.tamtam.ai/l/companies-with-mobile-app-hauts-de-france) (113) - [Companies with a mobile app in the Rhône department](https://www.tamtam.ai/l/companies-with-mobile-app-rhone) (111) - [Companies with a mobile app in the Nord department](https://www.tamtam.ai/l/companies-with-mobile-app-nord) (83) - [Companies with a mobile app in Pays de la Loire](https://www.tamtam.ai/l/companies-with-mobile-app-pays-de-la-loire) (82) - [Companies with a mobile app in the Bouches-du-Rhône department](https://www.tamtam.ai/l/companies-with-mobile-app-bouches-du-rhone) (71) - [Companies with a mobile app in Brittany](https://www.tamtam.ai/l/companies-with-mobile-app-brittany) (56) - [Companies with a mobile app in the Gironde department](https://www.tamtam.ai/l/companies-with-mobile-app-gironde) (55) - [Companies with a mobile app in the Haute-Garonne department](https://www.tamtam.ai/l/companies-with-mobile-app-haute-garonne) (54) - [Companies with a mobile app in the Alpes-Maritimes department](https://www.tamtam.ai/l/companies-with-mobile-app-alpes-maritimes) (45) - [Companies with a mobile app in the Seine-Saint-Denis department](https://www.tamtam.ai/l/companies-with-mobile-app-seine-saint-denis) (44) - [Companies with a mobile app in the Hérault department](https://www.tamtam.ai/l/companies-with-mobile-app-herault) (39) - [Companies with a mobile app in Normandy](https://www.tamtam.ai/l/companies-with-mobile-app-normandy) (39) - [Companies with a mobile app in Paris](https://www.tamtam.ai/l/companies-with-mobile-app-paris) (764) - [Companies with a mobile app in Lyon](https://www.tamtam.ai/l/companies-with-mobile-app-lyon) (78) - [Companies with a mobile app in Bordeaux](https://www.tamtam.ai/l/companies-with-mobile-app-bordeaux) (43) - [Companies with a mobile app in Marseille](https://www.tamtam.ai/l/companies-with-mobile-app-marseille) (39) ## The same list elsewhere - [Companies with a mobile app in the world](https://www.tamtam.ai/l/companies-with-mobile-app-in-the-world) (18,922) - [Companies with a mobile app in Europe](https://www.tamtam.ai/l/companies-with-mobile-app-in-europe) (7,899) --- Source: https://www.tamtam.ai/l/companies-with-mobile-app-loire-atlantique