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Top 30 Software Development companies in the Loire-Atlantique department

Tamtam tracks 137 Software Development companies headquartered in the Loire-Atlantique department. This list ranks the 30 largest by number of employees on LinkedIn, led by RCA, U IRIS devient U TECH and 4CAD Group. Their median headcount is 86. Half of them were founded in 2004 or later. The most common headquarters are Nantes (12), Saint-Herblain (5) and Carquefou (4).

馃嚝馃嚪 Loire-Atlantique30 companiesUpdated Nov 11, 2026

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.

#CompanyIndustryHeadquarters EmployeesFounded
1
RCArca.fr

Develops innovative software solutions for accounting professionals and their clients, streamlining management, advisory services, and digital transition for accounting firms.

Software Development 馃嚝馃嚪 Saint-Herblain 1,626 1999
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.

Software Development 馃嚝馃嚪 Carquefou 637 2011
3
4CAD Group4cadgroup.com

The company offers PLM, ERP, and IoT tools to help organizations optimize their information systems for increased industrial efficiency

Software Development 馃嚝馃嚪 Bouguenais 463 2004
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.

Software Development 馃嚝馃嚪 Nantes 427 2013
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.

Software Development 馃嚝馃嚪 Saint-S茅bastien-sur-Loire 331 1989
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.

Software Development 馃嚝馃嚪 La Chevroli猫re 283 1996
7
Obatobat.fr

Specialized invoicing software designed for contractors and self-employed individuals within the construction sector Streamlining financial processes and improving efficiency

Software Development 馃嚝馃嚪 Nantes 274 2019
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

Software Development 馃嚝馃嚪 Nantes 177 2009
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

Software Development 馃嚝馃嚪 Saint-Herblain 126 1975
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.

Software Development 馃嚝馃嚪 Nantes 114 1985
11
ISILOGisilog.fr

A comprehensive service management solution with modules for asset, service, project management, and continuous improvement, aligning with ITIL and ISO 20000 standards

Software Development 馃嚝馃嚪 Saint-Herblain 103 1992
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.

Software Development 馃嚝馃嚪 Carquefou 98 2007
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

Software Development 馃嚝馃嚪 Nantes 93 1998
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

Software Development 馃嚝馃嚪 Orvault 89 2009
15
PerformanSeperformanse.com

A leader in behavioral and cognitive skills assessments, providing innovative solutions for HR professionals in recruitment, talent management, and vocational guidance

Software Development 馃嚝馃嚪 Nantes 86 1988

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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.

Software Development 馃嚝馃嚪 La Chapelle-sur-Erdre 82 1999
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

Software Development 馃嚝馃嚪 Carquefou 77 1990
18
mobiappsFrmobiapps.fr

mobiApps specializes in creating multiplatform mobile apps using emerging hybrid technologies like HTML/CSS and JavaScript, along with digital strategy services

Software Development 馃嚝馃嚪 Orvault 74 2014
19
KoralPlaykoralplay.com

An experienced gaming technology partner providing omnichannel solutions, customized games, and comprehensive support for sports betting, gaming, and lottery operators globally

Software Development 馃嚝馃嚪 Nantes 72 2017
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

Software Development 馃嚝馃嚪 Saint-Herblain 69 2003
21
SITACIsitaci.fr

Supply Chain Solution specialist with over 30 years of expertise in logistics, offering innovative WMS EGO software implemented in 520+ sites globally

Software Development 馃嚝馃嚪 Haute Goulaine 66 1987
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

Software Development 馃嚝馃嚪 Carquefou 65 2005
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

Software Development 馃嚝馃嚪 Nantes 64 2022
24
MicroEJmicroej.com

Provides software solutions for embedded and IoT devices, transforming electronic products into software-defined, scalable, and flexible smart devices.

Software Development 馃嚝馃嚪 Nantes 58 2012
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

Software Development 馃嚝馃嚪 Nantes 55 2016
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.

Software Development 馃嚝馃嚪 Nantes 50 2001
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

Software Development 馃嚝馃嚪 Saint-Herblain 44 2005
28
HerculeProherculepro.com

Publishes software for PVC, wood, aluminum joinery, blinds, gates, fences, and closures, connecting manufacturers with installers for specialized quotes.

Software Development 馃嚝馃嚪 Cou毛ron 40 2004
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

Software Development 馃嚝馃嚪 Vigneux-de-Bretagne 39 1992
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

Software Development 馃嚝馃嚪 Nantes 38 2012

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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.

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