# List of AI consultancies and service providers in the Hauts-de-Seine department

Tamtam tracks 62 AI consultancies and service providers headquartered in the Hauts-de-Seine department. This list ranks the 30 largest by number of employees on LinkedIn, led by Astek, SFEIR and Jems Group. Their median headcount is 160. Half of them were founded in 2011 or later. The most common headquarters are Neuilly-sur-Seine (8), Boulogne-Billancourt (6) and Levallois-Perret (4).

These companies in Hauts-de-Seine are primarily IT services and consulting firms, with a strong focus on digital transformation, data, and artificial intelligence. They range from large established groups like Astek, which supports clients with deep technical expertise, to mid-sized companies such as SFEIR, providing expert application development, and Devoteam, specializing in Google Cloud solutions.

The headquarters are concentrated in a few cities within Hauts-de-Seine, with Boulogne-Billancourt, Levallois-Perret, and Neuilly-sur-Seine being prominent locations. Many of these firms, including Jems Group and MARGO, were founded in the 2000s, indicating a common era of growth for specialized IT and consulting services.

🇫🇷 Hauts-de-Seine · 30 companies · Updated Nov 12, 2026

| # | Company | Industry | Headquarters | Employees | Founded |
|---|---|---|---|---|---|
| 1 | [Astek](https://www.tamtam.ai/c/astek) (astekgroup.fr)<br>Supports clients with high-value service, deep technical expertise across technology, operations, and engineering, focusing on sustainable digital transformation with humans at the core. | IT Services and IT Consulting | 🇫🇷 Boulogne-Billancourt | 6,035 | 1988 |
| 2 | [SFEIR](https://www.tamtam.ai/c/sfeir) (sfeir.com)<br>Provides expert application development across web, mobile, cloud, data, and IoT, guiding clients through digital transformation with innovative products. | IT Services and IT Consulting | 🇫🇷 Neuilly-sur-Seine | 1,083 | 1985 |
| 3 | [Jems Group](https://www.tamtam.ai/c/jems-group) (jems-group.com)<br>Create, manage, and operate customer data patrimony, industrializing use cases and innovative services based on AI or pure analytics for key accounts. | IT Services and IT Consulting | 🇫🇷 Levallois-Perret | 717 | 2002 |
| 4 | [TNP Consultants](https://www.tamtam.ai/c/tnp-consultants) (tnpconsultants.com)<br>Independent consulting firm specializing in operational, regulatory, and digital transformations across multiple industries and regions worldwide. | Business Consulting and Services | 🇫🇷 Levallois-Perret | 584 | 2007 |
| 5 | [Devoteam \| Google Cloud Partner](https://www.tamtam.ai/c/devoteam-google-cloud-partner) (gcloud.devoteam.com)<br>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 | 🇫🇷 Levallois-Perret | 579 |  |
| 6 | [MARGO](https://www.tamtam.ai/c/margo) (margo.com)<br>Provides IT consulting, specializing in market finance, data science, and insurance, enabling clients' digital acceleration through diverse expert teams and tailored career paths. | IT Services and IT Consulting | 🇫🇷 Courbevoie | 385 | 2005 |
| 7 | [Lincoln France](https://www.tamtam.ai/c/lincoln-france) (lincoln.fr)<br>Offers data science and Modern BI expertise, consulting, and support for decision-making projects, utilizing predictive analysis and machine learning algorithms. | IT Services and IT Consulting | 🇫🇷 Boulogne-Billancourt | 316 | 1990 |
| 8 | [APGAR](https://www.tamtam.ai/c/apgar) (apgar-group.com)<br>Provides global consultancy and managed services in data management and AI, supporting diverse industries with sustainable, innovative solutions. | Business Consulting and Services | 🇫🇷 Neuilly-sur-Seine | 278 | 2013 |
| 9 | [Takima](https://www.tamtam.ai/c/takima) (takima.fr)<br>Specializing in software development and IT solutions, our team provides expertise in Java, Spring, Angular, React, Docker, mobile technologies, performance audits, and Agile methodologies | IT Services and IT Consulting | 🇫🇷 Bagneux | 210 | 2000 |
| 10 | [Adservio](https://www.tamtam.ai/c/adservio) (adservio.fr)<br>Design and implementation of resilient digital experiences through expert consulting, technical infrastructure optimization, and innovative technology solutions to ensure reliable business performance. | IT Services and IT Consulting | 🇫🇷 Puteaux | 190 |  |
| 11 | [Aneo](https://www.tamtam.ai/c/aneo-boulogne-billancourt) (aneo.eu)<br>Aneo is a consulting agency founded in 2002, specializing in organizational and digital transformations to make companies more human-centered and efficient | Business Consulting and Services | 🇫🇷 Boulogne-Billancourt | 172 | 2002 |
| 12 | [MP DATA](https://www.tamtam.ai/c/mp-data) (mpdata.fr)<br>Specialized digital transformation consulting company, focusing on Data Science and Operations Research for businesses | IT Services and IT Consulting | 🇫🇷 Boulogne-Billancourt | 164 |  |
| 13 | [ILLUIN Technology](https://www.tamtam.ai/c/illuin-technology) (illuin.tech)<br>Specialists in scientific, technological, Design Thinking, and UX, driving innovation and digital transformation by leveraging AI and user-centric approaches in agile, tech-driven solutions | IT Services and IT Consulting | 🇫🇷 Neuilly-sur-Seine | 162 | 2017 |
| 14 | [FINAXYS](https://www.tamtam.ai/c/finaxys) (finaxys.com)<br>Specialized IT consulting firm for financial institutions, providing expertise in financial engineering, IT systems architecture, application development, and software integration for market finance | Financial Services | 🇫🇷 Puteaux | 161 | 2008 |
| 15 | [Devoteam Data Driven](https://www.tamtam.ai/c/devoteam-data-driven) (devoteam.com)<br>A cross-functional team leveraging data insights to drive business impact, agility, competitiveness, and sustainable growth while nurturing a data-driven culture within organizations | IT Services and IT Consulting | 🇫🇷 Levallois-Perret | 160 | 2005 |
| 16 | [Openvalue](https://www.tamtam.ai/c/openvalue) (openvalue.co)<br>Openvalue is a consulting and integration firm specializing in Data & Artificial Intelligence, offering services in Machine Learning, NLP, UX design, and application development | Professional Services | 🇫🇷 Neuilly-sur-Seine | 133 | 2014 |
| 17 | [CARBON IT](https://www.tamtam.ai/c/carbon-it) (carbon-it.fr)<br>Consulting and IT expertise in Artificial Intelligence and Software Engineering. Structuring and industrializing digital ambitions combining technical excellence, methodological rigor, and business value creation. | IT Services and IT Consulting | 🇫🇷 Neuilly-sur-Seine | 121 | 2013 |
| 18 | [Aubay Data & AI](https://www.tamtam.ai/c/aubay-data-and-ai) (aubay.com)<br>Aubay Data & AI specializes in Data and Artificial Intelligence consulting, guiding clients in defining and implementing successful data strategies for innovation and transformation | Business Consulting and Services | 🇫🇷 Boulogne-Billancourt | 102 | 2024 |
| 19 | [Visian](https://www.tamtam.ai/c/visian) (visian.tech)<br>VISIAN, a subsidiary of Neurones Group, specializes in IT strategy, innovation, project management, product development, and data analysis to accelerate business transformation | IT Services and IT Consulting | 🇫🇷 Courbevoie | 80 | 2017 |
| 20 | [Cenova](https://www.tamtam.ai/c/cenova) (cenova.fr)<br>Cenova is a growing consulting firm specializing in helping clients transition to new B2C models, focusing on omnichannel, mobility, digitization, and personalization | Business Consulting and Services | 🇫🇷 Neuilly-sur-Seine | 79 | 2016 |
| 21 | [POLARYS](https://www.tamtam.ai/c/polarys) (silamir.com)<br>Specializing in advisory, design, and implementation of decision-making projects, with a team of 200 combining business expertise and technology mastery Providing top-notch analytical experiences to clients | IT Services and IT Consulting | 🇫🇷 Colombes | 79 | 2004 |
| 22 | [Seequalis](https://www.tamtam.ai/c/seequalis) (seequalis.com)<br>Accelerating new digital practices adoption through AI-powered experiences, change management, knowledge structuring, and IT service reliability for improved employee performance. | IT Services and IT Consulting | 🇫🇷 Courbevoie | 79 | 2015 |
| 23 | [Kapela](https://www.tamtam.ai/c/kapela) (kapela.fr)<br>Specializing in Business Intelligence, Big Data, and Artificial Intelligence, Evea Cognitive helps clients unlock value from structured and unstructured data for business growth | IT Services and IT Consulting | 🇫🇷 Saint-Cloud | 78 | 2004 |
| 24 | [GO & DEV](https://www.tamtam.ai/c/go-and-dev) (goandev.net)<br>Technical expertise for web project development including custom software creation and digital solutions for clients seeking professional programming and application design services. | IT Services and IT Consulting | 🇫🇷 Neuilly-sur-Seine | 75 | 2014 |
| 25 | [IÉSEG CONSEIL Paris](https://www.tamtam.ai/c/ieseg-conseil-paris) (iesegconseil.fr)<br>Non-profit student association providing consulting and study services to companies, offering practical experience to business school students. | Business Consulting and Services | 🇫🇷 Puteaux | 75 | 2013 |
| 26 | [SKIILS](https://www.tamtam.ai/c/skiils) (skiils.com)<br>Connecting top talents with business needs for sustainable impact in technology, Data, and AI projects, with strong expertise in complex project management. | IT Services and IT Consulting | 🇫🇷 Suresnes | 74 | 2020 |
| 27 | [WASSA](https://www.tamtam.ai/c/wassa) (wassa.io)<br>Innovative digital solutions provider based in Paris and Hong Kong, serving major corporations and start-ups Utilizes scientific expertise for customized services | IT Services and IT Consulting | 🇫🇷 Boulogne-Billancourt | 61 | 2011 |
| 28 | [TRIMANE \| Expert BI et Big Data](https://www.tamtam.ai/c/trimane-expert-bi-et-big-data) (trimane.fr)<br>Data management consultancy providing business intelligence and big data services to public and private sectors through technical expertise and methodological project support. | IT Services and IT Consulting | 🇫🇷 Puteaux | 60 | 2005 |
| 29 | [Polynom](https://www.tamtam.ai/c/polynom) (polynom.io)<br>Designing and deploying agentic AI systems, human-in-the-loop process automation, and production-grade AI platforms for optimizing complex business processes. | IT Services and IT Consulting | 🇫🇷 Rueil-Malmaison | 47 | 2017 |
| 30 | [Prime Analytics](https://www.tamtam.ai/c/prime-analytics) (primeanalytics.fr)<br>Consulting and training firm specializing in finance, data, and artificial intelligence, helping financial institutions and multinationals transform data into actionable insights. | IT Services and IT Consulting | 🇫🇷 Neuilly-sur-Seine | 44 | 2018 |

## 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 12, 2026.

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Source: https://www.tamtam.ai/l/ai-service-providers-hauts-de-seine