# Software Development companies headquartered in the Essonne department
Tamtam tracks 51 Software Development companies headquartered in the Essonne department. This list ranks the 30 largest by number of employees on LinkedIn, led by Infovista, Horoquartz and MEDIA IMMO. Their median headcount is 29. Half of them were founded in 2008 or later. The most common headquarters are Massy (9) and Palaiseau (5).
The Essonne department is home to a concentration of software development companies, many of which are mid-sized firms. These companies offer diverse solutions, from network optimization and workforce management to industrial IT and digital workspaces. They primarily serve business clients across various sectors.
Infovista provides data-driven solutions for network performance, while Horoquartz offers integrated solutions for workforce management. CODRA specializes in industrial IT and software distribution, and iObeya transforms workspaces into collaborative digital environments. A notable pattern is the strong presence of companies headquartered in Massy.
馃嚝馃嚪 Essonne 路 30 companies 路 Updated Nov 11, 2026
| # | Company | Industry | Headquarters | Employees | Founded |
|---|---|---|---|---|---|
| 1 | [Infovista](https://www.tamtam.ai/c/infovista) (infovista.com)
Empowers service providers and enterprises with data-driven solutions for optimizing network performance, enhancing customer experience, and driving business success. | Software Development | 馃嚝馃嚪 Massy | 834 | 1995 |
| 2 | [Horoquartz](https://www.tamtam.ai/c/horoquartz) (horoquartz.com)
Provides integrated solutions for workforce management, planning optimization, activity tracking, access control, and identity management, serving over 5000 clients globally. | Software Development | 馃嚝馃嚪 Massy | 568 | 1971 |
| 3 | [MEDIA IMMO](https://www.tamtam.ai/c/media-immo) (media-immo.fr)
Provides digital solutions for generating risk reports and urban planning documents specifically designed for real estate professionals. | Software Development | 馃嚝馃嚪 Corbeil-Essonnes | 200 | |
| 4 | [CODRA](https://www.tamtam.ai/c/codra) (codra.net)
Specializing in industrial IT, our company offers automation and test system services while also developing and distributing software solutions for various industries | Software Development | 馃嚝馃嚪 Massy | 181 | 1986 |
| 5 | [iObeya](https://www.tamtam.ai/c/iobeya) (iobeya.com)
Transforms physical workspaces into immersive, collaborative digital environments for sharing KPIs, plans, and ideas, fostering collective intelligence and quick decision-making. | Software Development | 馃嚝馃嚪 Massy | 156 | 2011 |
| 6 | [Exatech](https://www.tamtam.ai/c/exatech) (global.exatech-group.com)
Collaboration with universities and agencies to optimize and secure paper-based and digital examinations and assessments through innovative technology solutions. | Software Development | 馃嚝馃嚪 Verri猫res-le-Buisson | 114 | 1994 |
| 7 | [EBS Group France](https://www.tamtam.ai/c/ebs-group-france) (ebsgroup.fr)
Provides comprehensive IT services and equipment management, offering tailored software and hardware solutions to small and medium businesses. | Software Development | 馃嚝馃嚪 Bi猫vres | 88 | |
| 8 | [PI Electronique](https://www.tamtam.ai/c/pi-electronique) (pielectronique.com)
Established in 1983, a leading cash register system company in France and globally, providing certified NF 525 SPIN MANF cash registers | Software Development | 馃嚝馃嚪 Villebon-sur-Yvette | 82 | 1983 |
| 9 | [Aprovall](https://www.tamtam.ai/c/aprovall) (aprovall.com)
Comprehensive third-party lifecycle management platform supporting evaluation, onboarding, monitoring, and off-boarding across legal, finance, cybersecurity, and ethics domains. | Software Development | 馃嚝馃嚪 Massy | 61 | 2008 |
| 10 | [Cyrias](https://www.tamtam.ai/c/cyrias) (cyrias.com)
Consulting and integration company specializes in assisting Purchasing and Finance Departments with implementing Cloud Solutions, offering expertise in digital transformation projects | Software Development | 馃嚝馃嚪 Massy | 42 | 2018 |
| 11 | [STYREL](https://www.tamtam.ai/c/styrel) (styrel.fr)
Engineering and training services specializing in industrial IT, embedded real-time computing, custom industrial PCs, test benches, and complete system integration. | Software Development | 馃嚝馃嚪 Le Plessis-P芒t茅 | 41 | 1984 |
| 12 | [EZYTAIL](https://www.tamtam.ai/c/ezytail) (ezytail.com)
Industrial supply chain management providing back office software, mutualized logistics, transportation solutions, ERP integration, and consulting for new and existing multi-channel retailing businesses. | Software Development | 馃嚝馃嚪 Grigny | 41 | 2010 |
| 13 | [ERT Int茅gration - Groupe Kardol](https://www.tamtam.ai/c/ert-integration-groupe-kardol) (kardol.fr)
A subsidiary of KARDOL Group, specializing in SAP BUSINESS ONE integration for small to medium-sized businesses with expertise in industry, after-sales service, and trade | Software Development | 馃嚝馃嚪 Massy | 40 | 2002 |
| 14 | [Interact Software](https://www.tamtam.ai/c/interact-software) (interact-software.com)
This French company specializes in End User Experience and Digital Experience Management solutions for large organizations, aiming to improve user satisfaction and optimize IT assets | Software Development | 馃嚝馃嚪 Wissous | 29 | 2014 |
| 15 | [Infass Syst猫mes](https://www.tamtam.ai/c/infass-systemes) (infass.com)
Development of tailored software solutions for insurance, temporary work, petroleum storage, and point-to-point transport industries with specialized expertise. | Software Development | 馃嚝馃嚪 Montgeron | 29 | 1973 |
| 16 | [Aryason Consulting](https://www.tamtam.ai/c/aryason-consulting) (aryason.fr)
Massy based firm specialized in providing professional advice on computer systems and software solutions with seven years of industry experience. | Software Development | 馃嚝馃嚪 Massy | 26 | 2013 |
| 17 | [AVM INT脡GRATION](https://www.tamtam.ai/c/avm-integration) (avm-integration.com)
Develops software solutions, including video verbalization and security management, and distributes IP security products. Also offers customized application development and integration services. | Software Development | 馃嚝馃嚪 Corbeil-Essonnes | 25 | 2009 |
| 18 | [AMPHITRITE](https://www.tamtam.ai/c/amphitrite-palaiseau) (amphitrite.fr)
Specialized in advanced satellite and in-situ data processing for maritime decision-making, offering solutions for green shipping, defense, and environmental applications through end-user products. | Software Development | 馃嚝馃嚪 Palaiseau | 23 | 2021 |
| 19 | [DAMAaaS](https://www.tamtam.ai/c/damaaas) (damaaas.com)
INAGUA offers DAMAaaS, a platform for custom business applications with no coding, enabling efficient workflow collaboration, document management, and data security | Software Development | 馃嚝馃嚪 Juvisy-sur-Orge | 22 | 2012 |
| 20 | [SpinalCom](https://www.tamtam.ai/c/spinalcom) (spinalcom.com)
Develops sovereign software for building and infrastructure management. Its platform optimizes spaces, maintenance, energy, and unifies fragmented building data for smart operations. | Software Development | 馃嚝馃嚪 Palaiseau | 21 | 2009 |
| 21 | [TELINO](https://www.tamtam.ai/c/telino) (telino.com)
Specializing in digital transformation, TELINO offers innovative solutions for digitizing data flows, securing data, integrating with IT systems, and more | Software Development | 馃嚝馃嚪 Verri猫res-le-Buisson | 21 | 1986 |
| 22 | [WAVESOFT](https://www.tamtam.ai/c/wavesoft) (wavesoft.fr)
French software publisher specializing in management software for small to medium-sized businesses in Trade, Services, and Light Industry sectors Offers nine software modules | Software Development | 馃嚝馃嚪 Orsay | 21 | 2003 |
| 23 | [Simvia](https://www.tamtam.ai/c/simvia) (simvia.tech)
Provides open-source numerical simulation solutions supporting industrial projects, reducing reliance on proprietary software, controlling costs, and boosting competitiveness. | Software Development | 馃嚝馃嚪 Palaiseau | 20 | 2024 |
| 24 | [Arkangel](https://www.tamtam.ai/c/arkangel) (arkangel.io)
Design advanced AI-powered security platform integrating behavioral analytics, predictive intelligence, and extensive data analysis for comprehensive cyber threat detection. | Software Development | 馃嚝馃嚪 Palaiseau | 20 | 2019 |
| 25 | [EKILOG](https://www.tamtam.ai/c/ekilog) (ekilog.fr)
French software editor providing four integrated solutions for Microsoft 365, enhancing communication, automation, document management, and directory features within SharePoint and Teams. | Software Development | 馃嚝馃嚪 Saclay | 20 | 2010 |
| 26 | [Dir IPS](https://www.tamtam.ai/c/dir-ips) (dirips.com)
Development of IT solutions for healthcare, social, and medico-social sectors focusing on budgeting, staffing, user tracking, and regulatory compliance. | Software Development | 馃嚝馃嚪 脡pinay-sur-Orge | 19 | 1993 |
| 27 | [AFIDIUM](https://www.tamtam.ai/c/afidium) (afidium.com)
Afidium provides innovative B2B solutions for businesses in the tourism sector, optimizing revenue and profitability across Europe with tailor-made solutions | Software Development | 馃嚝馃嚪 Massy | 17 | 2005 |
| 28 | [Mipsology](https://www.tamtam.ai/c/mipsology) (amd.com)
A company founded in 2015 specializing in AI inference for AMD hardware, with software supporting TensorFlow, PyTorch, and ONNX frameworks | Software Development | 馃嚝馃嚪 Palaiseau | 17 | 2015 |
| 29 | [API - Advanced Prologue Innovation](https://www.tamtam.ai/c/api-advanced-prologue-innovation) (api-sas.fr)
A digital transition partner specializing in electronic invoices, EDIFACT exchanges, Chorus Pro integration, and electronic signature solutions for businesses of all sizes | Software Development | 馃嚝馃嚪 Les Ulis | 15 | 1986 |
| 30 | [iNet System](https://www.tamtam.ai/c/inet-system) (inet-system.com)
A Paris-based company offers Apple technology advice, product resale, installation, integration, support contracts, and software development services | Software Development | 馃嚝馃嚪 Bi猫vres | 14 | 2004 |
## 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 Essonne department
- [The largest companies in the Essonne department](https://www.tamtam.ai/l/largest-companies-essonne) (1,149)
- [Companies with in-house R&D in the Essonne department](https://www.tamtam.ai/l/r-and-d-companies-essonne) (198)
- [Multinational companies in the Essonne department](https://www.tamtam.ai/l/multinational-companies-essonne) (156)
- [Manufacturers in the Essonne department](https://www.tamtam.ai/l/manufacturers-essonne) (127)
- [Hardware manufacturers in the Essonne department](https://www.tamtam.ai/l/hardware-companies-essonne) (114)
- [Distributors and wholesalers in the Essonne department](https://www.tamtam.ai/l/distributors-and-wholesalers-essonne) (76)
- [IT Services and IT Consulting companies in the Essonne department](https://www.tamtam.ai/l/it-services-and-it-consulting-companies-essonne) (70)
- [Professional services firms in the Essonne department](https://www.tamtam.ai/l/professional-services-firms-essonne) (68)
- [Public sector organisations in the Essonne department](https://www.tamtam.ai/l/public-sector-organisations-essonne) (66)
- [Aerospace and defence companies in the Essonne department](https://www.tamtam.ai/l/aerospace-and-defense-companies-essonne) (65)
- [IT services companies in the Essonne department](https://www.tamtam.ai/l/it-services-companies-essonne) (60)
- [Retail chains in the Essonne department](https://www.tamtam.ai/l/retail-chains-essonne) (59)
- [Construction companies in the Essonne department](https://www.tamtam.ai/l/construction-companies-essonne) (56)
- [Pharmaceutical companies in the Essonne department](https://www.tamtam.ai/l/pharmaceutical-companies-essonne) (45)
- [Electronics and semiconductor companies in the Essonne department](https://www.tamtam.ai/l/electronics-companies-essonne) (44)
- [Research institutes in the Essonne department](https://www.tamtam.ai/l/research-institutes-essonne) (42)
- [Events Services companies in the Essonne department](https://www.tamtam.ai/l/events-services-companies-essonne) (41)
- [SaaS companies in the Essonne department](https://www.tamtam.ai/l/saas-companies-essonne) (41)
- [Consulting firms in the Essonne department](https://www.tamtam.ai/l/consulting-firms-essonne) (40)
- [Family-owned companies in the Essonne department](https://www.tamtam.ai/l/family-owned-companies-essonne) (38)
- [Contract manufacturers in the Essonne department](https://www.tamtam.ai/l/contract-manufacturers-essonne) (35)
- [Research Services companies in the Essonne department](https://www.tamtam.ai/l/research-services-companies-essonne) (35)
- [Critical infrastructure operators in the Essonne department](https://www.tamtam.ai/l/critical-infrastructure-operators-essonne) (32)
- [Education providers in the Essonne department](https://www.tamtam.ai/l/education-companies-essonne) (30)
## The same list elsewhere in France
- [Software Development companies in France](https://www.tamtam.ai/l/software-development-companies-france) (4,210)
- [Software Development companies in 脦le-de-France](https://www.tamtam.ai/l/software-development-companies-ile-de-france) (1,992)
- [Software Development companies in Auvergne-Rh么ne-Alpes](https://www.tamtam.ai/l/software-development-companies-auvergne-rhone-alpes) (502)
- [Software Development companies in Occitanie](https://www.tamtam.ai/l/software-development-companies-occitanie) (315)
- [Software Development companies in the Hauts-de-Seine department](https://www.tamtam.ai/l/software-development-companies-hauts-de-seine) (301)
- [Software Development companies in the Rh么ne department](https://www.tamtam.ai/l/software-development-companies-rhone) (264)
- [Software Development companies in Provence-Alpes-C么te d'Azur](https://www.tamtam.ai/l/software-development-companies-provence-alpes-cote-dazur) (223)
- [Software Development companies in Grand Est](https://www.tamtam.ai/l/software-development-companies-grand-est) (211)
- [Software Development companies in Nouvelle-Aquitaine](https://www.tamtam.ai/l/software-development-companies-nouvelle-aquitaine) (210)
- [Software Development companies in Pays de la Loire](https://www.tamtam.ai/l/software-development-companies-pays-de-la-loire) (198)
- [Software Development companies in Hauts-de-France](https://www.tamtam.ai/l/software-development-companies-hauts-de-france) (177)
- [Software Development companies in the Nord department](https://www.tamtam.ai/l/software-development-companies-nord) (141)
- [Software Development companies in the Haute-Garonne department](https://www.tamtam.ai/l/software-development-companies-haute-garonne) (140)
- [Software Development companies in the Loire-Atlantique department](https://www.tamtam.ai/l/software-development-companies-loire-atlantique) (137)
- [Software Development companies in Brittany](https://www.tamtam.ai/l/software-development-companies-brittany) (132)
- [Software Development companies in the Gironde department](https://www.tamtam.ai/l/software-development-companies-gironde) (124)
- [Software Development companies in the Bouches-du-Rh么ne department](https://www.tamtam.ai/l/software-development-companies-bouches-du-rhone) (121)
- [Software Development companies in the H茅rault department](https://www.tamtam.ai/l/software-development-companies-herault) (107)
- [Software Development companies in the Is猫re department](https://www.tamtam.ai/l/software-development-companies-isere) (90)
- [Software Development companies in the Ille-et-Vilaine department](https://www.tamtam.ai/l/software-development-companies-ille-et-vilaine) (80)
- [Software Development companies in Paris](https://www.tamtam.ai/l/software-development-companies-paris) (1,413)
- [Software Development companies in Lyon](https://www.tamtam.ai/l/software-development-companies-lyon) (178)
- [Software Development companies in Toulouse](https://www.tamtam.ai/l/software-development-companies-toulouse) (89)
- [Software Development companies in Lille](https://www.tamtam.ai/l/software-development-companies-lille) (77)
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Source: https://www.tamtam.ai/l/software-development-companies-essonne