The companies listed are primarily large and mid-sized managed service providers in the Île-de-France region, with a strong emphasis on IT services and telecommunications. Several firms specialize in digital transformation and cybersecurity. Capgemini delivers end-to-end services across strategy, technology, and business operations, while Orange, a telecommunications operator, provides services globally. Atos offers AI-powered solutions in cybersecurity, cloud, and high-performance computing, and Orange Business focuses on next-generation connectivity and cybersecurity solutions.
A significant cluster of these companies, including Capgemini, Orange Business, SFR Business, Magellan, and Consort Group, have their headquarters in Paris. Other major players like Atos and Bull are based in Bezons, and Orange in Issy-les-Moulineaux. The data highlights a concentration of IT services and telecommunications expertise across various locations within the Île-de-France area.
| # | Company | Employees | |||
|---|---|---|---|---|---|
| 1 |
Capgeminicapgemini.com
Imagine future organizations, making it real with AI, technology, and people, delivering end-to-end services and solutions across strategy, technology, design, engineering and business operations |
342,989 | |||
| 2 |
Orangeorange.com
A leading global telecommunications operator offering services to millions of customers and multinational companies across 26 countries |
146,935 | |||
| 3 | 85,294 | ||||
| 4 |
Orange Businessorange-business.com
Leading European network and digital integrator leveraging expertise in next-generation connectivity, cloud, and cybersecurity solutions for positive impact on customers and planet. |
28,626 | |||
| 5 |
Inetuminetum.com
European digital services leader helping businesses, public sector, and society with digital impact, performance, and innovation, partnering with major software publishers. |
21,788 | |||
| 6 |
Econocomeconocom.com
Supplies, finances, and provides managed services for workplace, audiovisual, and infrastructures, supporting businesses in their digital transformation with equipment and support. |
7,123 | |||
| 7 |
Axiansaxians.com
A technology company supporting digital transformation by providing ICT solutions in cybersecurity, telecommunication, data analytics, cloud services, and more |
4,186 | |||
| 8 |
Cegedimcegedim.com
Technology and services for digital data flow management in healthcare ecosystems and B2B, plus business software publishing for healthcare and insurance professionals. |
4,103 | |||
| 9 |
SFR Businesssfrbusiness.fr
Provides innovative services supporting company growth and digital transformation. Offers high-performance fixed and mobile connectivity and ICT solutions to businesses and public administrations. |
3,520 | |||
| 10 |
CGGviridiengroup.com
Advanced technology and Earth data company resolving natural resource, energy transition, and infrastructure challenges through geoscience, data, sensing. |
3,342 | |||
| 11 | 3,306 | ||||
| 12 | 2,930 | ||||
| 13 |
Magellanmagellangroup.eu
Magellan Partners helps businesses succeed in their digital transformation by combining business expertise, technology knowledge, and digital creativity to open new digital paths |
2,794 | |||
| 14 |
Consort Groupconsort-group.com
Enables companies to leverage data assets for competitive advantage through IT infrastructure services, data expertise, digital development, and media engineering. |
1,747 | |||
| 15 | 1,741 | ||||
| 16 |
BPCE Infogérance & Technologiesbpce-it.fr
This company builds and operates information systems, providing IT production and infrastructure services for the Group BPCE entities, focusing on quality, security, and employee experience. |
1,643 | |||
| 17 |
Prodwareprodwaregroup.com
Supports organizations in complex digital transformation, combining expertise with innovation. Delivers end-to-end value from consulting to managed services, developing own AI solutions. |
1,522 | |||
| 18 |
SCC Francescc.com
Provides comprehensive IT solutions, including cybersecurity, digital workplace, and hybrid infrastructure, enabling businesses to optimize operations and achieve their goals. |
1,422 | |||
| 19 |
CMScms-france.net
Provides managed services for IT systems, ensuring efficient operation and maintenance of infrastructure and applications for businesses. |
1,287 | |||
| 20 |
NXO Francenxo.eu
Independent leader in French Telecom integration, undertaking complex projects, anticipating customer needs, attracting talent, and focusing on well-done work. |
1,200 | |||
| 21 |
Mistralmistral.ai
A Europe-based company develops fast, secure, and open-source language models specialized for business use cases using private data and feedback |
1,156 | |||
| 22 |
Axians Franceaxians.fr
Supports clients with digital infrastructure and solutions, covering applications, data, networks, cloud, telecom, and cybersecurity through consulting, design, integration, and services. |
1,137 | |||
| 23 |
ALTAREAaltarea.com
Leading French company specializing in low-carbon urban transformation, offering comprehensive real estate services for city development and management. |
1,132 | |||
| 24 |
Marlinkmarlink.com
Designs, builds, and manages hybrid network solutions, combining satellite, terrestrial, and digital services to optimize remote business operations with digital technologies. |
1,127 | |||
| 25 |
CDC Informatiqueicdc.caissedesdepots.fr
Provides IT solutions, guarantees security and integrity for public sector clients. Technological competence and innovation are key, anticipating and supporting digital changes. |
1,049 | |||
| 26 |
Nomios Groupnomios.com
Designs, secures, and manages digital infrastructures, developing innovative cybersecurity and networking solutions through consulting, managed, and professional services for organizations. |
887 | |||
| 27 |
Claranet Franceclaranet.com
Leading European provider of managed hosting, network, and communication services, serving thousands of businesses across multiple countries and data centers. |
750 | |||
| 28 |
Scalewayscaleway.com
Provides secure, transparent, sustainable cloud and AI platforms. Empowers organizations with open, independent technologies and continuous innovation for building and scaling their digital infrastructure. |
667 | |||
| 29 |
Tenexatenexa.com
Offers digital services through subsidiaries, focusing on Cloud, cybersecurity, and global IT outsourcing from data centers to users, supporting client innovation strategies. |
624 | |||
| 30 | 586 | ||||
| 31 |
Devoteam | Google Cloud Partnergcloud.devoteam.com
Provides innovative Google Cloud solutions across AI, IT modernization, security, and work transformation, with expertise in migrating users and assisting organizations. |
579 | |||
| 32 |
Globecastglobecast.com
Leading broadcast, media & entertainment managed services platform specializing in cloud migration, advanced hybrid cloud solutions, live TV channel distribution, and content monetization |
547 | |||
| 33 |
CELESTEceleste.fr
A national provider of internet access and connectivity solutions for businesses, offering innovative, high-availability, and eco-friendly services such as fiber optic connections and cloud hosting |
537 | |||
| 34 |
HexaWarehexaware.net
HexaWare offers tailored IT solutions and support to ensure continuity of your computer systems and constant access to your data |
487 | |||
| 35 |
AMEXIOamexiogroup.com
Digital transformation partner specializing in Enterprise Content Management, Customer Communication Management, and Customer Experience Management, prioritizing human excellence for successful outcomes |
477 | |||
| 36 | 463 | ||||
| 37 | 435 | ||||
| 38 | 424 | ||||
| 39 |
NEURONES-ITneurones-it.com
Specializes in IT infrastructure consulting, integration, and management, supporting clients through system evolution, cloud, security, and datacenter services. |
413 | |||
| 40 |
Devoteam | Microsoft Partnerdevoteam.com
Premium Microsoft cloud consulting and managed services with expertise in cloud, cybersecurity, data, and sustainable digital transformation across EMEA. |
413 | |||
| 41 |
Xeliansxelians.com
A French company specializing in document management services for businesses, offering software solutions, scanning, archiving, and consultancy to support digital transition |
412 | |||
| 42 |
Orange Wholesaleorange.com
Providing resilient infrastructures and secure connectivity solutions globally, supporting operators and digital leaders in powering the digital society. |
408 | |||
| 43 |
Lùklaluklagroup.com
Experts in digital transformation supporting clients through all development stages, addressing business and technological challenges with various complementary service offers. |
407 | |||
| 44 |
Sewan Groupesewan.fr
Cloud operator and host providing essential communication services to businesses, with a national network of over 1000 partners serving 75,000 companies and 2000 mid-sized enterprises |
384 | |||
| 45 |
Wifirstwifirst.com
Designs, deploys, and operates high-performance, secure, sustainable WiFi connectivity solutions as a service for businesses and public organizations, relieving their IT teams. |
377 | |||
| 46 |
Insideinsidegroup.fr
Offers digital consulting and services, simplifying business transformation from strategy to implementation, focusing on concrete, lasting results across infrastructure, cloud, digital, and cybersecurity. |
372 | |||
| 47 |
OUTSCALEoutscale.com
Sovereign cloud operator providing virtual twin solutions for data control, cyber governance, and sustainable infrastructure optimization for organizations. |
355 | |||
| 48 |
SECURINFORsecurinfor.fr
Provides comprehensive IT services, from infrastructure design and deployment to technical assistance and cybersecurity, ensuring secure, performant, and sustainable digital environments for large clients across France. |
354 | |||
| 49 |
Jilitijiliti-group.com
A trusted partner specializing in IT infrastructure management, offering agile solutions to maintain, transform, and optimize data centers for sustainable performance worldwide |
350 | |||
| 50 | 337 | ||||
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. | |||||
| 51 |
Foliateamfoliateam.com
FOLIATEAM offers secure cloud telephony, IT, and cybersecurity solutions for businesses and public organizations, providing reliable networks, cloud services, and tailored support |
335 | |||
| 52 |
DATASOLUTION - Partner of your digital transformationdatasolution.fr
Assists customers in digital transformation through strategy, consulting, eCommerce, PIM/MDM, cloud hosting, and an in-house digital agency. |
324 | |||
| 53 |
Cloud Templecloud-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. |
310 | |||
| 54 |
NEXTEDIAnextedia.com
The Nextedia Group specializes in Cybersecurity, Cloud, Digital Workspace, and Customer Experience, providing expertise and solutions to large companies across various sectors |
305 | |||
| 55 | 303 | ||||
| 56 |
Cyllenegroupe-cyllene.com
Provides digital transformation through consulting, architecture, hosting, cybersecurity, application deployment, and data intelligence, emphasizing human expertise in technology solutions. |
295 | |||
| 57 |
Devoteam | AWS Partnerdevoteam.com
It is an AWS Premier Consulting Partner with over 450 experts, providing scalable infrastructure and innovative solutions across multiple European countries. |
290 | |||
| 58 |
Data4data4group.com
Designs, builds, operates smart, scalable, sustainable digital infrastructures. Supports digital growth for cloud providers, telecom operators, tech companies, multinational corporations. Offers secure, flexible hosting solutions. |
287 | |||
| 59 |
Ozitemgroupeozitem.com
Supports customers with digital innovation. Provides IT and cloud infrastructure solutions, enabling clients to focus on their core business in the digital world. |
285 | |||
| 60 |
APL Data Centerapl-datacenter.com
Consultancy, engineering, construction, operation, and maintenance of data centers. Sustainable IT and ecological data center design. |
280 | |||
| 61 |
Upsun (formerly Platform.sh)upsun.com
Provides a cloud platform for hybrid teams, enabling developers, DevOps, and platform teams to build, ship, and scale applications without backend infrastructure hassles. |
271 | |||
| 62 | 269 | ||||
| 63 |
NEURONESneurones.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 |
259 | |||
| 64 |
Shadowshadow.tech
Provides cloud-based PC streaming services, enabling users to create, play, and work on any device with a stable internet connection. |
244 | |||
| 65 |
C2Sbouyguestelecom-business.fr
Providing IT services and innovative solutions in information systems, supported by partnerships and dynamic research and development activities. |
243 | |||
| 66 |
Cellnex Francecellnex.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. |
240 | |||
| 67 |
ITS Servicesitsservices.fr
ITS Services is a leading company in IT Infrastructure & Operations, offering expertise in Observability, SRE, and AIOps for accelerated time to market |
240 | |||
| 68 |
Econocom Franceeconocom.com
Provides, finances, and manages services for workplaces, audiovisuals, and infrastructures, including equipment purchase, configuration, maintenance, and user support. |
231 | |||
| 69 |
EASYTEAMeasyteam.fr
Global provider of Oracle solutions including implementation, management, training, and software asset management for businesses and administrations in France. |
231 | |||
| 70 |
Cegedim Outsourcingcegedim-outsourcing.fr
Specializes in IT and BPO services with strong technological partnerships, providing high-level technical expertise and independent consulting. |
230 | |||
| 71 |
Completelcompletel.fr
Leading telecommunications FTTO operator in France, offering high-speed data solutions, internet up to 10 gigabit/s, innovative security, high-availability data centers, and cloud services to businesses nationwide |
224 | |||
| 72 |
Cellenzacellenza.com
Provides IT consulting and implementation services, specializing in Microsoft Cloud solutions, including advisory, security, data, AI, and application development, aiding digital transformation. |
223 | |||
| 73 |
Bleubleucloud.fr
A French cloud services company aiming for SecNumCloud 32 qualification, owned by Capgemini and Orange, providing Microsoft 365 and Azure solutions for various entities |
210 | |||
| 74 |
Revevolrevevol.com
Cloud transformation consultancy providing digital workplace migration, customer success, app development, and machine learning services through strategic partnerships with Google and Microsoft. |
210 | |||
| 75 |
Ecritelecritel.com
Managed hosting specialist providing cloud architecture consulting, outsourcing, containerization, and security compliance for e-commerce and organizations with critical internet tools across three continents. |
203 | |||
| 76 |
SYXPERIANEsyxperiane.com
Specializing in digital transformation, our company focuses on making each project a human-centered process, providing expertise in IT, software integration, and cloud hosting |
201 | |||
| 77 |
ReeVo Cloud & Cybersécuritéreevo.fr
Provides integrated cloud and cybersecurity services, protecting and safeguarding company data assets within secure digital strongboxes, adhering to high standards. |
200 | |||
| 78 |
LINKBYNETaccenture.com
A innovative company providing outsourcing and cloud computing solutions, focusing on digital infrastructure development, management, and security for business transformation |
196 | |||
| 79 |
INTERDATAinterdata.fr
French company providing certified expertise in IT networks, SI security, and observability for over 40 years Offering tailored services for reliable, scalable, and secure network management |
188 | |||
| 80 | 181 | ||||
| 81 |
Prolivalprolival.fr
A French IT company specializing in designing, implementing, and managing IT infrastructures for clients, ensuring successful project completion with skilled teams and proven methods |
178 | |||
| 82 |
Diabolocomdiabolocom.com
Leading European provider of SaaS contact center solutions, helping companies streamline customer journeys, manage interactions, and increase KPIs across all channels |
178 | |||
| 83 |
STORDATAstordata.fr
Specializing in data management, STORDATA offers consulting, architecture, implementation, and support services, focusing on storage, backup, archiving, and virtualization solutions for clients' success |
177 | |||
| 84 |
IELO Groupielo.net
IELO is a neutral telecom infrastructure operator providing high-speed networks for professionals, focusing on nationwide expansion and becoming a top wholesale operator in France |
176 | |||
| 85 |
Neos-SDIneos-sdi.com
Global tech consulting firm specializing in innovative growth strategies through Microsoft technologies Providing tailored solutions and support in Europe and North America |
173 | |||
| 86 |
Exaprobeeconocom.com
Supports companies through digital transformation, defining, integrating, and operating digital services and infrastructure for network, security, communication, both in-house and cloud. |
173 | |||
| 87 |
Cognacq-Jay Imagecognacqjayimage.com
A trusted partner for delivering and promoting video content on all screens, offering end-to-end solutions for managing workflow and expanding audience reach |
167 | |||
| 88 | 164 | ||||
| 89 |
Sipartechsipartech.com
Since 2008, the company deploys fiber optic networks in France and Europe, connecting data centers and business centers to provide excellent connectivity services |
163 | |||
| 90 |
METALINE DATA CENTER SERVICES
Provides technical consulting and services in IT, telecoms, and industry environments, supporting technical and IT departments in design, study, and support projects. |
162 | |||
| 91 |
Eurofiber France
Provides extensive fiber optic network and innovative, secure cloud hosting solutions to support business digital transformation and connectivity needs. |
161 | |||
| 92 | 160 | ||||
| 93 |
cegedim.cloudcegedim.cloud
Cloud hosting provider offering secure, high-performance services including managed hosting, virtual servers, and colocation, with expertise in healthcare software and data security |
160 | |||
| 94 | 159 | ||||
| 95 |
Arondorarondor.com
Specialists in document management offering tailored solutions for all types of organizations, from SMEs to large corporations, managing the entire content lifecycle seamlessly |
156 | |||
| 96 |
LINAGORAlinagora.com
For 20 years, this company has been developing ethical Free and Open Source software to make a positive impact on people, society, and the planet globally |
142 | |||
| 97 |
Direction de la Transformation Numérique (DTNUM)interieur.gouv.fr
The department drives the ministry's digital strategy, fostering innovation, data utilization, and accessible services. It develops agent work environments, builds secure infrastructures, and supports various ministry functions through digital advancements. |
141 | |||
| 98 | 136 | ||||
| 99 |
GROUPE ROS DIGITALrosdigital.fr
A comprehensive group offering printing solutions, IT services, cloud storage, telecom solutions, communication products, and LED lighting expertise with dedicated specialists in each field |
136 | |||
| 100 |
ITS Integraitsintegra.com
ITS Integra is a subsidiary of ITS Group, specializing in off-site hosting and IT management for clients, focusing on customized services and added value |
134 | |||
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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 12, 2026.
More company lists in Île-de-France
- The largest companies in Île-de-France 36,142
- Multinational companies in Île-de-France 6,028
- Professional services firms in Île-de-France 3,377
- SaaS companies in Île-de-France 2,859
- IT Services and IT Consulting companies in Île-de-France 2,776
- Companies with in-house R&D in Île-de-France 2,695
- IT services companies in Île-de-France 2,624
- Consulting firms in Île-de-France 2,408
- Retail chains in Île-de-France 2,316
- Software Development companies in Île-de-France 1,992
- Business Consulting and Services companies in Île-de-France 1,904
- Financial services firms in Île-de-France 1,731
- Manufacturers in Île-de-France 1,515
- Law Practice companies in Île-de-France 1,366
- Subscription businesses in Île-de-France 1,359
- Education providers in Île-de-France 1,300
- Advertising Services companies in Île-de-France 1,264
- Financial Services companies in Île-de-France 1,197
- Marketing and communications agencies in Île-de-France 1,174
- Hardware manufacturers in Île-de-France 1,142
- Companies with a mobile app in Île-de-France 1,105
- Recruitment and staffing agencies in Île-de-France 1,014
- Public sector organisations in Île-de-France 993
- Technology, Information and Internet companies in Île-de-France 982
The same list elsewhere in France
- Managed service providers in France 749
- Managed service providers in the Hauts-de-Seine department 122
- Managed service providers in Auvergne-Rhône-Alpes 89
- Managed service providers in Occitanie 49
- Managed service providers in Pays de la Loire 47
- Managed service providers in Grand Est 46
- Managed service providers in the Rhône department 45
- Managed service providers in Hauts-de-France 42
- Managed service providers in Nouvelle-Aquitaine 33
- Managed service providers in Provence-Alpes-Côte d'Azur 32
- Managed service providers in the Nord department 26
- Managed service providers in the Yvelines department 25
- Managed service providers in Paris 123