# Top 30 managed service providers in the Hauts-de-Seine department
Tamtam tracks 122 managed service providers headquartered in the Hauts-de-Seine department. This list ranks the 30 largest by number of employees on LinkedIn, led by Orange, Econocom and Axians. Their median headcount is 547. Half of them were founded in 1999 or later. The most common headquarters are Puteaux (5), Boulogne-Billancourt (4) and Issy-les-Moulineaux (4).
This selection of managed service providers in Hauts-de-Seine consists mainly of large and mid-sized companies specialized in IT services and telecommunications. Key players include Orange, a global telecommunications operator; Econocom, which provides IT equipment and managed services; Axians, offering ICT solutions in cybersecurity and cloud services; and Cegedim, focused on digital data flow management in healthcare.
The companies are concentrated in several cities across the department, notably Nanterre, Issy-les-Moulineaux, and Boulogne-Billancourt, suggesting a geographical cluster for these types of services. Many of these firms were founded between the 1970s and early 2000s, indicating a mature sector.
馃嚝馃嚪 Hauts-de-Seine 路 30 companies 路 Updated Nov 11, 2026
| # | Company | Industry | Headquarters | Employees | Founded |
|---|---|---|---|---|---|
| 1 | [Orange](https://www.tamtam.ai/c/orange-issy-les-moulineaux) (orange.com)
A leading global telecommunications operator offering services to millions of customers and multinational companies across 26 countries | Telecommunications | 馃嚝馃嚪 Issy-les-Moulineaux | 146,935 | |
| 2 | [Econocom](https://www.tamtam.ai/c/econocom) (econocom.com)
Supplies, finances, and provides managed services for workplace, audiovisual, and infrastructures, supporting businesses in their digital transformation with equipment and support. | IT Services and IT Consulting | 馃嚝馃嚪 Puteaux | 7,123 | 1973 |
| 3 | [Axians](https://www.tamtam.ai/c/axians) (axians.com)
A technology company supporting digital transformation by providing ICT solutions in cybersecurity, telecommunication, data analytics, cloud services, and more | IT Services and IT Consulting | 馃嚝馃嚪 Nanterre | 4,186 | |
| 4 | [Cegedim](https://www.tamtam.ai/c/cegedim) (cegedim.com)
Technology and services for digital data flow management in healthcare ecosystems and B2B, plus business software publishing for healthcare and insurance professionals. | IT Services and IT Consulting | 馃嚝馃嚪 Boulogne-Billancourt | 4,103 | 1969 |
| 5 | [SPIE ICS](https://www.tamtam.ai/c/spie-ics) (spie.fr)
Supports digital transformation for businesses with ICT solutions, providing expertise in IT infrastructure, cloud, cybersecurity, and data & IoT for enhanced performance and user well-being. | IT Services and IT Consulting | 馃嚝馃嚪 Malakoff | 2,930 | 2001 |
| 6 | [TDF](https://www.tamtam.ai/c/tdf) (tdf.fr)
In the heart of the digital revolution, this company develops innovative solutions for managing and distributing audio, video, and data content through various transmission methods | Telecommunications | 馃嚝馃嚪 Montrouge | 1,741 | 1975 |
| 7 | [SCC France](https://www.tamtam.ai/c/scc-france) (scc.com)
Provides comprehensive IT solutions, including cybersecurity, digital workplace, and hybrid infrastructure, enabling businesses to optimize operations and achieve their goals. | IT Services and IT Consulting | 馃嚝馃嚪 Nanterre | 1,422 | 1975 |
| 8 | [IGA](https://www.tamtam.ai/c/iga) (iga.fr)
Develops software components, creates custom solutions, implements installations, and provides specific services like hosting and accounting outsourcing for insurance, travel, and trade. | Software Development | 馃嚝馃嚪 Malakoff | 1,358 | 1985 |
| 9 | [NXO France](https://www.tamtam.ai/c/nxo-france) (nxo.eu)
Independent leader in French Telecom integration, undertaking complex projects, anticipating customer needs, attracting talent, and focusing on well-done work. | IT Services and IT Consulting | 馃嚝馃嚪 Puteaux | 1,200 | |
| 10 | [Axians France](https://www.tamtam.ai/c/axians-france) (axians.fr)
Supports clients with digital infrastructure and solutions, covering applications, data, networks, cloud, telecom, and cybersecurity through consulting, design, integration, and services. | IT Services and IT Consulting | 馃嚝馃嚪 Nanterre | 1,137 | 1999 |
| 11 | [CDC Informatique](https://www.tamtam.ai/c/cdc-informatique) (icdc.caissedesdepots.fr)
Provides IT solutions, guarantees security and integrity for public sector clients. Technological competence and innovation are key, anticipating and supporting digital changes. | IT Services and IT Consulting | 馃嚝馃嚪 Bagneux | 1,049 | 1959 |
| 12 | [Nomios Group](https://www.tamtam.ai/c/nomios-group) (nomios.com)
Designs, secures, and manages digital infrastructures, developing innovative cybersecurity and networking solutions through consulting, managed, and professional services for organizations. | Computer and Network Security | 馃嚝馃嚪 Boulogne-Billancourt | 887 | 2004 |
| 13 | [oXya](https://www.tamtam.ai/c/oxya) (oxya.com)
Leading provider of SAP technical services, cloud solutions, and hosting for midsize and global organizations, enhancing efficiency and flexibility of SAP infrastructure worldwide | IT Services and IT Consulting | 馃嚝馃嚪 Issy-les-Moulineaux | 586 | |
| 14 | [Devoteam \| Google Cloud Partner](https://www.tamtam.ai/c/devoteam-google-cloud-partner) (gcloud.devoteam.com)
Provides innovative Google Cloud solutions across AI, IT modernization, security, and work transformation, with expertise in migrating users and assisting organizations. | IT Services and IT Consulting | 馃嚝馃嚪 Levallois-Perret | 579 | |
| 15 | [Globecast](https://www.tamtam.ai/c/globecast) (globecast.com)
Leading broadcast, media & entertainment managed services platform specializing in cloud migration, advanced hybrid cloud solutions, live TV channel distribution, and content monetization | Broadcast Media Production and Distribution | 馃嚝馃嚪 Issy-les-Moulineaux | 547 | |
| 16 | [AMEXIO](https://www.tamtam.ai/c/amexio) (amexiogroup.com)
Digital transformation partner specializing in Enterprise Content Management, Customer Communication Management, and Customer Experience Management, prioritizing human excellence for successful outcomes | IT Services and IT Consulting | 馃嚝馃嚪 Neuilly-sur-Seine | 477 | 2006 |
| 17 | [Linkt](https://www.tamtam.ai/c/linkt) (linkt.fr)
Provides managed services, telecom, and cybersecurity expertise for mid-sized and large companies, and local authorities, to optimize and secure their digital infrastructure. | Telecommunications | 馃嚝馃嚪 Puteaux | 463 | 2016 |
| 18 | [METSYS](https://www.tamtam.ai/c/metsys) (metsys.fr)
Advises clients on cybersecurity, infrastructure, and cloud solution design and implementation. Over 500 employees across France, 93.2M in revenue. | IT Services and IT Consulting | 馃嚝馃嚪 Boulogne-Billancourt | 435 | 2011 |
| 19 | [Almond](https://www.tamtam.ai/c/almond) (almond.eu)
Formed from NetXP and Provadys, positioned as a major independent French player in audit and consulting for Cybersecurity, Cloud, and Infrastructure. | IT Services and IT Consulting | 馃嚝馃嚪 S猫vres | 424 | 2006 |
| 20 | [Devoteam \| Microsoft Partner](https://www.tamtam.ai/c/devoteam-microsoft-partner) (devoteam.com)
Premium Microsoft cloud consulting and managed services with expertise in cloud, cybersecurity, data, and sustainable digital transformation across EMEA. | IT Services and IT Consulting | 馃嚝馃嚪 Levallois-Perret | 413 | |
| 21 | [OUTSCALE](https://www.tamtam.ai/c/outscale) (outscale.com)
Sovereign cloud operator providing virtual twin solutions for data control, cyber governance, and sustainable infrastructure optimization for organizations. | IT Services and IT Consulting | 馃嚝馃嚪 Saint-Cloud | 355 | 2010 |
| 22 | [Keyyo](https://www.tamtam.ai/c/keyyo) (keyyo.com)
Innovative communication solutions with VoIP for businesses, managed through the Cloud Trusted by over 10,000 clients in various industries | Telecommunications | 馃嚝馃嚪 Clichy | 337 | 1994 |
| 23 | [Cloud Temple](https://www.tamtam.ai/c/cloud-temple) (cloud-temple.com)
Provides IT transformation, hosting, and outsourcing for critical business applications. Guides customers from conception to maintenance across various IT verticals, specializing in private cloud. | IT Services and IT Consulting | 馃嚝馃嚪 Puteaux | 310 | 2017 |
| 24 | [NEXTEDIA](https://www.tamtam.ai/c/nextedia) (nextedia.com)
The Nextedia Group specializes in Cybersecurity, Cloud, Digital Workspace, and Customer Experience, providing expertise and solutions to large companies across various sectors | IT Services and IT Consulting | 馃嚝馃嚪 Puteaux | 305 | |
| 25 | [Devoteam \| AWS Partner](https://www.tamtam.ai/c/devoteam-aws-partner) (devoteam.com)
It is an AWS Premier Consulting Partner with over 450 experts, providing scalable infrastructure and innovative solutions across multiple European countries. | IT Services and IT Consulting | 馃嚝馃嚪 Levallois-Perret | 290 | |
| 26 | [Ozitem](https://www.tamtam.ai/c/ozitem) (groupeozitem.com)
Supports customers with digital innovation. Provides IT and cloud infrastructure solutions, enabling clients to focus on their core business in the digital world. | IT Services and IT Consulting | 馃嚝馃嚪 Levallois-Perret | 285 | 1990 |
| 27 | [APL Data Center](https://www.tamtam.ai/c/apl-data-center) (apl-datacenter.com)
Consultancy, engineering, construction, operation, and maintenance of data centers. Sustainable IT and ecological data center design. | Engineering Services | 馃嚝馃嚪 Montrouge | 280 | 1983 |
| 28 | [NEURONES](https://www.tamtam.ai/c/neurones) (neurones.net)
A group of 5,400 experts specializing in management consulting, organization, and digital IT services, supporting clients in digital transformation projects and system upgrades | IT Services and IT Consulting | 馃嚝馃嚪 Nanterre | 259 | 1985 |
| 29 | [C2S](https://www.tamtam.ai/c/c2s-issy-les-moulineaux) (bouyguestelecom-business.fr)
Providing IT services and innovative solutions in information systems, supported by partnerships and dynamic research and development activities. | IT Services and IT Consulting | 馃嚝馃嚪 Issy-les-Moulineaux | 243 | |
| 30 | [Cellnex France](https://www.tamtam.ai/c/cellnex-france) (cellnex.com)
Operating and maintaining mobile towers, fiber optic networks, and data centers for telecommunications operators and organizations requiring large-scale digital connectivity and hosting services. | Telecommunications | 馃嚝馃嚪 Boulogne-Billancourt | 240 | 2016 |
## 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 Hauts-de-Seine department
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- [Hardware manufacturers in the Hauts-de-Seine department](https://www.tamtam.ai/l/hardware-companies-hauts-de-seine) (199)
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## The same list elsewhere in France
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- [Managed service providers in 脦le-de-France](https://www.tamtam.ai/l/managed-service-providers-ile-de-france) (322)
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- [Managed service providers in Grand Est](https://www.tamtam.ai/l/managed-service-providers-grand-est) (46)
- [Managed service providers in the Rh么ne department](https://www.tamtam.ai/l/managed-service-providers-rhone) (45)
- [Managed service providers in Hauts-de-France](https://www.tamtam.ai/l/managed-service-providers-hauts-de-france) (42)
- [Managed service providers in Nouvelle-Aquitaine](https://www.tamtam.ai/l/managed-service-providers-nouvelle-aquitaine) (33)
- [Managed service providers in Provence-Alpes-C么te d'Azur](https://www.tamtam.ai/l/managed-service-providers-provence-alpes-cote-dazur) (32)
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- [Managed service providers in the Yvelines department](https://www.tamtam.ai/l/managed-service-providers-yvelines) (25)
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Source: https://www.tamtam.ai/l/managed-service-providers-hauts-de-seine