# Top 30 IT Services and IT Consulting companies in the Essonne department
Tamtam tracks 70 IT Services and IT Consulting companies headquartered in the Essonne department. This list ranks the 30 largest by number of employees on LinkedIn, led by APIXIT, Pasqal and MIEL. Their median headcount is 50. Half of them were founded in 2002 or later. The most common headquarters are Les Ulis (4), Massy (4) and Gif-sur-Yvette (3).
These companies in Essonne are primarily engaged in IT services and IT consulting. They represent a mix of mid-sized firms and established companies, with a strong focus on digital transformation, cybersecurity, and infrastructure solutions. Many provide comprehensive services ranging from audits and consulting to integration and maintenance.
Key players include APIXIT, offering cybersecurity and cloud solutions, and Pasqal, which specializes in quantum simulators. MIEL distributes advanced hi-tech products, while DSI GROUP focuses on engineering services. IJNEXT is prominent in IT infrastructure, and APILOG Automation integrates industrial automation. A clear pattern is the concentration of headquarters in cities like Massy, Les Ulis, and Bi猫vres.
馃嚝馃嚪 Essonne 路 30 companies 路 Updated Nov 11, 2026
| # | Company | Industry | Headquarters | Employees | Founded |
|---|---|---|---|---|---|
| 1 | [APIXIT](https://www.tamtam.ai/c/apixit) (apixit.fr)
Provides cybersecurity, infrastructure, and cloud solutions, supporting clients through audits, consulting, integration, maintenance, and managed services for digital transformation. | IT Services and IT Consulting | 馃嚝馃嚪 Les Ulis | 303 | 1992 |
| 2 | [Pasqal](https://www.tamtam.ai/c/pasqal) (pasqal.com)
The company specializes in building programmable quantum simulators and computers using neutral atoms in optical tweezers for quantum information processing | IT Services and IT Consulting | 馃嚝馃嚪 Palaiseau | 297 | 2019 |
| 3 | [MIEL](https://www.tamtam.ai/c/miel) (miel.fr)
It imports and distributes advanced hi-tech products, offering technical assistance, training, and solutions for telecom and severe environments. | IT Services and IT Consulting | 馃嚝馃嚪 Bi猫vres | 277 | 1985 |
| 4 | [DSI GROUP](https://www.tamtam.ai/c/dsi-group) (group-dsi.com)
An engineering services company within the DSI GROUP, prioritizing staff development and customer relationships with a focus on flexibility and customer loyalty | IT Services and IT Consulting | 馃嚝馃嚪 Massy | 225 | 2007 |
| 5 | [IJNEXT](https://www.tamtam.ai/c/ijnext) (ijnext.com)
A major player in IT infrastructure services and innovative technologies, offering comprehensive solutions in security, performance, and automation through three interconnected companies | IT Services and IT Consulting | 馃嚝馃嚪 Les Ulis | 202 | |
| 6 | [APILOG Automation](https://www.tamtam.ai/c/apilog-automation) (apilog.com)
Specialized in industrial and commercial automation integration, part of a larger group with expertise in civil engineering and construction, serving SMEs | IT Services and IT Consulting | 馃嚝馃嚪 Massy | 115 | 2004 |
| 7 | [KYOCERA Document Solutions France](https://www.tamtam.ai/c/kyocera-document-solutions-france) (kyoceradocumentsolutions.fr)
Provide comprehensive document management solutions including software, hardware, and professional services to support digital transformation and reduce environmental impact. | IT Services and IT Consulting | 馃嚝馃嚪 Massy | 113 | 1959 |
| 8 | [MOJOVIDA](https://www.tamtam.ai/c/mojovida) (mojovida.fr)
Specializing in point of sale information systems for distribution and restaurant chains, providing expertise in optimizing operations and customer service | IT Services and IT Consulting | 馃嚝馃嚪 Nozay | 74 | 1999 |
| 9 | [Groupe ATGT](https://www.tamtam.ai/c/groupe-atgt) (groupe-atgt.com)
The ATGT Group offers technical, legal, and land expertise for territorial development through modern surveying techniques and a focus on innovation | IT Services and IT Consulting | 馃嚝馃嚪 Saint-Pierre-du-Perray | 70 | 1947 |
| 10 | [SOLUTYS Group](https://www.tamtam.ai/c/solutys-group) (solutys.com)
Specializes in automatic identification, network and cybersecurity solutions, offering comprehensive products and services to large companies and SMEs. | IT Services and IT Consulting | 馃嚝馃嚪 Lisses | 65 | 2002 |
| 11 | [Systematic Paris-Region](https://www.tamtam.ai/c/systematic-paris-region) (systematic-paris-region.org)
Community of 900 members focused on Deep Tech, accelerating digital transformation in industry, services, and society through collaborative innovation. | IT Services and IT Consulting | 馃嚝馃嚪 Palaiseau | 59 | 2005 |
| 12 | [IPSILAN NETWORKS](https://www.tamtam.ai/c/ipsilan-networks) (ipsilan-networks.fr)
Integration of network and telecom solutions with strong technical expertise, client partnership, and proactive business development for tailored support. | IT Services and IT Consulting | 馃嚝馃嚪 Bi猫vres | 58 | 1997 |
| 13 | [IBS](https://www.tamtam.ai/c/ibs) (ibs-cloud.fr)
Global IT provider offering a wide range of services, including maintenance, IT management, and cybersecurity Experienced teams ensure personalized support for optimal system security and performance | IT Services and IT Consulting | 馃嚝馃嚪 Mennecy | 52 | 1978 |
| 14 | [Olfeo](https://www.tamtam.ai/c/olfeo) (olfeo.com)
A French company specializing in Internet content filtering solutions, optimizing internal and external user access, including mobile devices, with five complementary products | IT Services and IT Consulting | 馃嚝馃嚪 Massy | 50 | 2003 |
| 15 | [PROTECTIC](https://www.tamtam.ai/c/protectic) (protectic.fr)
Engineering company, intervening in large-scale industrial projects (aeronautics, space, defense, energy, transport). Accompanying major industrial players in product development. | IT Services and IT Consulting | 馃嚝馃嚪 Bi猫vres | 50 | 1983 |
| 16 | [Elecom SAS](https://www.tamtam.ai/c/elecom-sas) (elecom.fr)
French manufacturer of interactive solutions such as touch screens, kiosks, and digital applications Official Samsung partner delivering tailored solutions for events and businesses | IT Services and IT Consulting | 馃嚝馃嚪 Villejust | 46 | 1986 |
| 17 | [Junior CentraleSup茅lec](https://www.tamtam.ai/c/junior-centralesupelec) (juniorcs.fr)
Junior CentraleSup茅lec is a student-run consulting firm offering services in digital, electronics, strategy, data analytics, and environment sectors with over 4500 future engineering graduates | IT Services and IT Consulting | 馃嚝馃嚪 Gif-sur-Yvette | 42 | 1969 |
| 18 | [ISI](https://www.tamtam.ai/c/isi) (isicrunch.com)
Development of SaaS platforms enabling publishers to create accessible, enriched digital textbooks and e-learning modules for learners with disabilities. | IT Services and IT Consulting | 馃嚝馃嚪 Gif-sur-Yvette | 41 | 2003 |
| 19 | [NirWana](https://www.tamtam.ai/c/nirwana) (nirwana.fr)
The company offers complete and highly customizable telephone systems, comprehensive IT solutions, network cabling, and tailored industrial servers and testing benches | IT Services and IT Consulting | 馃嚝馃嚪 Morangis | 41 | 2009 |
| 20 | [Coffreo](https://www.tamtam.ai/c/coffreo) (coffreo.biz)
The company provides HR dematerialization services for BtoB and BtoC customers, offering savings, environmental benefits, and secure storage for important documents | IT Services and IT Consulting | 馃嚝馃嚪 Orsay | 40 | 2007 |
| 21 | [HSBC TECHNOLOGIE](https://www.tamtam.ai/c/hsbc-technologie)
Information technology and services company located in 脦ledefrance, France, specializing in delivering technology solutions to clients | IT Services and IT Consulting | 馃嚝馃嚪 Grigny | 38 | |
| 22 | [DML](https://www.tamtam.ai/c/dml) (dml.fr)
An ICT services provider established in 1998, offering technical expertise, consulting, project management, and technology integration in Security, CyberSecurity, Identity Management, and Messaging | IT Services and IT Consulting | 馃嚝馃嚪 Les Ulis | 34 | 1978 |
| 23 | [ATGT G茅om猫tre-Expert](https://www.tamtam.ai/c/atgt-geometre-expert)
A Geomatics firm based in Ile de France and Auvergne Rh么ne Alpes, specializing in surveying and expert geographic services | IT Services and IT Consulting | 馃嚝馃嚪 Saint-Pierre-du-Perray | 33 | |
| 24 | [M2i](https://www.tamtam.ai/c/m2i-marolles-en-hurepoix) (informatique-m2i.fr)
Provides network installation, cloud services with Office 365, business applications, and security systems for companies and individuals. | IT Services and IT Consulting | 馃嚝馃嚪 Marolles-en-Hurepoix | 33 | 2010 |
| 25 | [Automatants - Association d'IA de CentraleSup茅lec](https://www.tamtam.ai/c/automatants-association-d-ia-de-centralesupelec) (automatants.cs-campus.fr)
An association at CentraleSup茅lec school for AI enthusiasts, providing training, projects, and events focused on artificial intelligence technologies | IT Services and IT Consulting | 馃嚝馃嚪 Gif-sur-Yvette | 32 | 2018 |
| 26 | [ANANAS](https://www.tamtam.ai/c/ananas) (ananas.bio)
A company specializing in audiovisual and networking solutions for businesses, government, education, and retail spaces, offering high-quality products and expert advice | IT Services and IT Consulting | 馃嚝馃嚪 Ballancourt-sur-Essonne | 29 | 2020 |
| 27 | [LOGIC INSTRUMENT](https://www.tamtam.ai/c/logic-instrument) (logic-instrument.com)
A supplier of mobile computers for B2B markets, offering rugged tablets and smartphones for industry, defense, and low-cost solutions for enterprises | IT Services and IT Consulting | 馃嚝馃嚪 Igny | 27 | 1987 |
| 28 | [compuBase consulting](https://www.tamtam.ai/c/compubase-consulting) (en.compubase.net)
Provider of channel information for IT and telecom sectors, offering business intelligence and marketing services to optimize clients' indirect sales networks | IT Services and IT Consulting | 馃嚝馃嚪 Les Ulis | 27 | 1989 |
| 29 | [CPP-SYSTEM](https://www.tamtam.ai/c/cpp-system)
A consulting and IT service company operating in Madagascar and France, specialized in digital payment, customer loyalty, and management solutions Coming soon! | IT Services and IT Consulting | 馃嚝馃嚪 Ballainvilliers | 24 | |
| 30 | [INTRAPOLE](https://www.tamtam.ai/c/intrapole) (intrapole.fr)
Providing IT management, web development, event management software, consulting, hosting, security, and hardware supply with in-house expertise. | IT Services and IT Consulting | 馃嚝馃嚪 Mennecy | 23 | 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)
- [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)
- [Software Development companies in the Essonne department](https://www.tamtam.ai/l/software-development-companies-essonne) (51)
- [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
- [IT Services and IT Consulting companies in France](https://www.tamtam.ai/l/it-services-and-it-consulting-companies-france) (4,943)
- [IT Services and IT Consulting companies in 脦le-de-France](https://www.tamtam.ai/l/it-services-and-it-consulting-companies-ile-de-france) (2,776)
- [IT Services and IT Consulting companies in the Hauts-de-Seine department](https://www.tamtam.ai/l/it-services-and-it-consulting-companies-hauts-de-seine) (706)
- [IT Services and IT Consulting companies in Auvergne-Rh么ne-Alpes](https://www.tamtam.ai/l/it-services-and-it-consulting-companies-auvergne-rhone-alpes) (455)
- [IT Services and IT Consulting companies in Provence-Alpes-C么te d'Azur](https://www.tamtam.ai/l/it-services-and-it-consulting-companies-provence-alpes-cote-dazur) (261)
- [IT Services and IT Consulting companies in Occitanie](https://www.tamtam.ai/l/it-services-and-it-consulting-companies-occitanie) (259)
- [IT Services and IT Consulting companies in the Rh么ne department](https://www.tamtam.ai/l/it-services-and-it-consulting-companies-rhone) (253)
- [IT Services and IT Consulting companies in Hauts-de-France](https://www.tamtam.ai/l/it-services-and-it-consulting-companies-hauts-de-france) (226)
- [IT Services and IT Consulting companies in Grand Est](https://www.tamtam.ai/l/it-services-and-it-consulting-companies-grand-est) (213)
- [IT Services and IT Consulting companies in Nouvelle-Aquitaine](https://www.tamtam.ai/l/it-services-and-it-consulting-companies-nouvelle-aquitaine) (190)
- [IT Services and IT Consulting companies in the Nord department](https://www.tamtam.ai/l/it-services-and-it-consulting-companies-nord) (169)
- [IT Services and IT Consulting companies in Pays de la Loire](https://www.tamtam.ai/l/it-services-and-it-consulting-companies-pays-de-la-loire) (167)
- [IT Services and IT Consulting companies in the Bouches-du-Rh么ne department](https://www.tamtam.ai/l/it-services-and-it-consulting-companies-bouches-du-rhone) (154)
- [IT Services and IT Consulting companies in the Haute-Garonne department](https://www.tamtam.ai/l/it-services-and-it-consulting-companies-haute-garonne) (152)
- [IT Services and IT Consulting companies in the Yvelines department](https://www.tamtam.ai/l/it-services-and-it-consulting-companies-yvelines) (118)
- [IT Services and IT Consulting companies in the Val-de-Marne department](https://www.tamtam.ai/l/it-services-and-it-consulting-companies-val-de-marne) (113)
- [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)
- [IT Services and IT Consulting companies in the Gironde department](https://www.tamtam.ai/l/it-services-and-it-consulting-companies-gironde) (105)
- [IT Services and IT Consulting companies in Brittany](https://www.tamtam.ai/l/it-services-and-it-consulting-companies-brittany) (101)
- [IT Services and IT Consulting companies in Paris](https://www.tamtam.ai/l/it-services-and-it-consulting-companies-paris) (1,547)
- [IT Services and IT Consulting companies in Lyon](https://www.tamtam.ai/l/it-services-and-it-consulting-companies-lyon) (160)
- [IT Services and IT Consulting companies in Boulogne-Billancourt](https://www.tamtam.ai/l/it-services-and-it-consulting-companies-boulogne-billancourt) (105)
- [IT Services and IT Consulting companies in Toulouse](https://www.tamtam.ai/l/it-services-and-it-consulting-companies-toulouse) (103)
- [IT Services and IT Consulting companies in Levallois-Perret](https://www.tamtam.ai/l/it-services-and-it-consulting-companies-levallois-perret) (81)
---
Source: https://www.tamtam.ai/l/it-services-and-it-consulting-companies-essonne