The Loire-Atlantique department hosts a concentration of software development companies, ranging from mid-sized firms to larger groups. These companies specialize in a variety of sectors, offering solutions for accounting, retail, industrial efficiency, public administration, and e-commerce.
Key players include RCA, which develops software for accounting professionals, U IRIS devient U TECH, focusing on IT systems for the Groupement U, and 4CAD Group, providing PLM, ERP, and IoT tools for industrial optimization. Akeneo empowers businesses with product experience management, while ARP脠GE SAS delivers digital solutions for local governments. Obat specializes in invoicing software for the construction sector.
| # | Company | Employees | |||
|---|---|---|---|---|---|
| 1 | 1,626 | ||||
| 2 |
U IRIS devient U TECHu-emploi.com
Management and innovation of the entire Groupement U IT system, supporting retail, supply chain, and digital transformation projects. |
637 | |||
| 3 |
4CAD Group4cadgroup.com
The company offers PLM, ERP, and IoT tools to help organizations optimize their information systems for increased industrial efficiency |
463 | |||
| 4 |
Akeneoakeneo.com
Empowering business leaders with software, education, and community for product experience management. Offering intelligent Product Cloud for data enrichment, management, and syndication. |
427 | |||
| 5 |
ARP脠GE SASarpege.fr
Provides innovative digital solutions for local governments, focusing on population management, decision systems, and e-service platforms to enhance citizen experience. |
331 | |||
| 6 |
Proginovproginov.com
French publisher of cloud-hosted management software and ERP solutions specializing in industrial, distribution, and healthcare sectors with dedicated secure data hosting services. |
283 | |||
| 7 | 274 | ||||
| 8 |
Lengowlengow.com
E-commerce automation solution enabling brands to improve performance, automate processes, and expand internationally by integrating with 200+ marketplaces and 1,400+ channels |
177 | |||
| 9 |
MONEWEB - JESjes.fr
A French leader in collective space management solutions, providing a comprehensive approach for catering, payment, and other services with a focus on improving consumer experience |
126 | |||
| 10 |
proLogistik France (DSIA)logistar-dsia.com
French subsidiary of a pan-European group, publishing, integrating, and hosting supply chain solutions, including WMS, OMS, LMS, TMS, ensuring optimal security and accessibility. |
114 | |||
| 11 | 103 | ||||
| 12 |
Wiztiviwiztivi.com
Empowering telecom, media, and content providers to deliver next-generation entertainment experiences through cutting-edge video applications and a world-class cloud gaming solution. |
98 | |||
| 13 |
MyScriptmyscript.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 |
93 | |||
| 14 |
Operisweb.operis.fr
Operis specializes in digital solutions for French local authorities in urban planning, land management, heritage, and education, aiming to improve services for citizens and stakeholders |
89 | |||
| 15 |
PerformanSeperformanse.com
A leader in behavioral and cognitive skills assessments, providing innovative solutions for HR professionals in recruitment, talent management, and vocational guidance |
86 | |||
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. | |||||
| 16 |
Mercuriamercuria.fr
Advises and supports businesses with SaaS, Cloud, or hosted solutions for accounting, financial, payroll, and HR management software, working with reliable publishers. |
82 | |||
| 17 |
PRIOS GROUPEprios.fr
PRIOS Group specializes in developing industry-specific software for the agri-food and personal equipment sectors, offering ERP solutions, services, and complementary modules for businesses globally |
77 | |||
| 18 |
mobiappsFrmobiapps.fr
mobiApps specializes in creating multiplatform mobile apps using emerging hybrid technologies like HTML/CSS and JavaScript, along with digital strategy services |
74 | |||
| 19 |
KoralPlaykoralplay.com
An experienced gaming technology partner providing omnichannel solutions, customized games, and comprehensive support for sports betting, gaming, and lottery operators globally |
72 | |||
| 20 |
Meteodynmeteodyn.com
The company specializes in wind engineering, meteorology, and climatology, offering software solutions and services for renewable energy, infrastructure, and climate change adaptation |
69 | |||
| 21 | 66 | ||||
| 22 |
Obeoobeosoft.com
Provider of open modeling software solutions for industrial systems, IT applications, and digital transformation Offers Open Source technologies and custom modeling solutions |
65 | |||
| 23 |
Costructorcostructor.co
Costructor is the first all-in-one software for managing construction businesses on mobile or PC, offering comprehensive solutions for the industry |
64 | |||
| 24 |
MicroEJmicroej.com
Provides software solutions for embedded and IoT devices, transforming electronic products into software-defined, scalable, and flexible smart devices. |
58 | |||
| 25 |
Inlead by Adplorerinlead.fr
InLead is a digital marketing platform for national networks, offering modules for geolocated campaigns, online reputation management, and personalized marketing strategies |
55 | |||
| 26 |
Virage Groupviragegroup.com
Provides management solutions to centralize strategic plans, evaluate progress, and manage project portfolios, ensuring investments generate expected value and support decision-making. |
50 | |||
| 27 |
CEDREOcedreo.com
3D home design software for builders, contractors, and designers Creates efficient design presentations, 2D/3D floor plans, and photorealistic renderings to streamline sales processes |
44 | |||
| 28 |
HerculeProherculepro.com
Publishes software for PVC, wood, aluminum joinery, blinds, gates, fences, and closures, connecting manufacturers with installers for specialized quotes. |
40 | |||
| 29 |
M茅dia Softsmediasofts.fr
A Nantes-based company specializing in software for landscaping professionals and metalwork, providing tools for technical design, project management, and business operations |
39 | |||
| 30 |
TOOVALUtoovalu.com
Leader in Climate & CSR strategy software, Toovalu Impact supports clients and stakeholders in their RSE & Climate initiatives, focusing on sustainability and progress |
38 | |||
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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.
More company lists in the Loire-Atlantique department
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- Retail chains in the Loire-Atlantique department 163
- Multinational companies in the Loire-Atlantique department 159
- Professional services firms in the Loire-Atlantique department 158
- SaaS companies in the Loire-Atlantique department 135
- IT services companies in the Loire-Atlantique department 130
- Manufacturers in the Loire-Atlantique department 125
- IT Services and IT Consulting companies in the Loire-Atlantique department 110
- Consulting firms in the Loire-Atlantique department 94
- Distributors and wholesalers in the Loire-Atlantique department 94
- Hardware manufacturers in the Loire-Atlantique department 86
- Business Consulting and Services companies in the Loire-Atlantique department 83
- Public sector organisations in the Loire-Atlantique department 82
- Family-owned companies in the Loire-Atlantique department 71
- Education providers in the Loire-Atlantique department 68
- Real Estate companies in the Loire-Atlantique department 67
- Financial services firms in the Loire-Atlantique department 65
- Law Practice companies in the Loire-Atlantique department 62
- Retail companies in the Loire-Atlantique department 61
- Subscription businesses in the Loire-Atlantique department 61
- Critical infrastructure operators in the Loire-Atlantique department 59
- Events Services companies in the Loire-Atlantique department 58
- Construction companies in the Loire-Atlantique department 57
The same list elsewhere in France
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