# 30 leading consulting firms in Lille

Tamtam tracks 38 consulting firms headquartered in Lille. This list ranks the 30 largest by number of employees on LinkedIn, led by ACALY Conseil en Ingénierie, NIKITA and Diligentia | Audit • Conseil • Expertise. Their median headcount is 21. Half of them were founded in 2014 or later.

The consulting firms in Lille include a mix of established and young companies, primarily focused on business, IT, and specialized services. ACALY Conseil en Ingénierie provides technical and organizational consulting, while NIKITA offers consulting and creative communication services. Diligentia specializes in accounting and auditing, and Citéo Médiation focuses on mediation and facilitation for societal change. Les-Tilleuls.coop designs and develops open-source web and mobile projects.

A notable pattern among these firms is a strong presence of IT services and consulting, with companies like ICSIS, BeWe, and Meedz specializing in digital transformation, app development, and cybersecurity. The majority of these firms were founded in the 2010s, indicating a relatively recent growth in the consulting sector in Lille.

🇫🇷 Lille · 30 companies · Updated Nov 11, 2026

| # | Company | Industry | Headquarters | Employees | Founded |
|---|---|---|---|---|---|
| 1 | [ACALY Conseil en Ingénierie](https://www.tamtam.ai/c/acaly-conseil-en-ingenierie) (acaly.eu)<br>The company provides technical and organizational consulting services, offers work packages for project outsourcing, and focuses on research and innovation for clients' success | Business Consulting and Services | 🇫🇷 Lille | 183 | 2015 |
| 2 | [NIKITA](https://www.tamtam.ai/c/nikita-lille) (nikita.fr)<br>Consulting and creative communication services focused on facilitating positive change and business transformation through impactful, useful, and efficient creativity. | Advertising Services | 🇫🇷 Lille | 137 | 1991 |
| 3 | [Diligentia \| Audit • Conseil • Expertise](https://www.tamtam.ai/c/diligentia-audit-conseil-expertise) (diligentia.fr)<br>An accounting and auditing firm in Northern France offering personalized support in accounting, taxation, legal, and social matters for businesses and professionals | Accounting | 🇫🇷 Lille | 133 |  |
| 4 | [Citéo Médiation](https://www.tamtam.ai/c/citeo-mediation) (citeo.org)<br>Mediation and facilitation agency assisting businesses, communities, and citizens in navigating societal change through tailored guidance promoting understanding, participation, and sustainable collective action | Civic and Social Organizations | 🇫🇷 Lille | 125 | 1998 |
| 5 | [Les-Tilleuls.coop](https://www.tamtam.ai/c/les-tilleuls-coop) (les-tilleuls.coop)<br>Design and development of innovative web and mobile projects using open-source software, with democratic cooperative governance and profit sharing. | Software Development | 🇫🇷 Lille | 74 | 2011 |
| 6 | [OTTEO](https://www.tamtam.ai/c/otteo) (otteo.fr)<br>A consulting and engineering company offering services in product development, recruitment assistance, and professional training across various sectors Contact for more information | Business Consulting and Services | 🇫🇷 Lille | 57 | 2010 |
| 7 | [ICSIS](https://www.tamtam.ai/c/icsis) (icsis.fr)<br>An innovative digital company specializing in digital transformation projects, offering a wide range of services such as app development, BI, and project management assistance | IT Services and IT Consulting | 🇫🇷 Lille | 37 | 2013 |
| 8 | [BeWe](https://www.tamtam.ai/c/bewe) (bewe.eu)<br>A service company specializing in guiding organizations through digital transformation with expertise in collaboration solutions, business consulting, technology integration, change management, and user adoption | IT Services and IT Consulting | 🇫🇷 Lille | 36 | 2013 |
| 9 | [ORSEU ETHIX](https://www.tamtam.ai/c/orseu-ethix) (orseu-ethix.fr)<br>Provide expertise and support to CSE representatives for economic understanding, negotiation, social policy improvement, and adapting to legislative changes. | Legal Services | 🇫🇷 Lille | 34 | 1992 |
| 10 | [OZEO Consulting](https://www.tamtam.ai/c/ozeo-consulting) (ozeo-consulting.fr)<br>OZEO Consulting is a young digital service company focusing on differentiated intellectual services with strong human values and excellence | IT Services and IT Consulting | 🇫🇷 Lille | 32 |  |
| 11 | [ZeTrace](https://www.tamtam.ai/c/zetrace) (zetrace.com)<br>A leading consultancy specializing in digital commerce transformation and sustainability for medium to large B2C and B2B organizations, offering expertise and recruitment services | Technology, Information and Internet | 🇫🇷 Lille | 31 | 2018 |
| 12 | [L’Échappée Bière](https://www.tamtam.ai/c/l-echappee-biere) (event.echappee-biere.com)<br>A tourism and event agency specializing in beer, offering unique experiences, tours, and events focused on discovering the French and international beer culture | Events Services | 🇫🇷 Lille | 26 | 2013 |
| 13 | [Meedz](https://www.tamtam.ai/c/meedz) (meedz.io)<br>Meedz specializes in creating innovative digital tools to enhance client performance and competitiveness They excel in development, Devops, and data solutions | IT Services and IT Consulting | 🇫🇷 Lille | 24 | 2021 |
| 14 | [LUPISE](https://www.tamtam.ai/c/lupise) (lupise.fr)<br>The company specializes in securing organizations through cybersecurity services such as audits, training, project management, crisis management support, and secure development | IT Services and IT Consulting | 🇫🇷 Lille | 22 |  |
| 15 | [Talosi](https://www.tamtam.ai/c/talosi) (talosi.com)<br>Talosi is a new generation IT consulting company focused on personalized and transparent services, where employees feel at home They embrace a geek culture | IT Services and IT Consulting | 🇫🇷 Lille | 21 | 2021 |
| 16 | [Data-IT - Groupe IT & You ©️](https://www.tamtam.ai/c/data-it-groupe-it-and-you) (data-it.fr)<br>Data-IT is a high-end IT services company specialized in office and computer technologies, offering expertise and technical skills to develop and maintain clients' information systems | Computer and Network Security | 🇫🇷 Lille | 20 | 2014 |
| 17 | [Solener](https://www.tamtam.ai/c/solener) (solener.fr)<br>Solener is a sustainable building consultancy with over 30 years of experience, focusing on energy efficiency, environmental optimization, and innovative solutions | Construction | 🇫🇷 Lille | 17 | 1988 |
| 18 | [SKILLX](https://www.tamtam.ai/c/skillx) (skillx.fr)<br>A technology company from Hauts-de-France specializing in cybersecurity and cloud services to accelerate clients' IT transition, with a liberated and trust-based approach | Computer and Network Security | 🇫🇷 Lille | 13 | 2018 |
| 19 | [Sapiologie](https://www.tamtam.ai/c/sapiologie) (sapiologie.com)<br>A sustainability consulting firm offering life cycle analysis to measure environmental, social, and ethical impacts, providing recommendations for sustainable practices | Environmental Services | 🇫🇷 Lille | 12 | 2021 |
| 20 | [symbolist.](https://www.tamtam.ai/c/symbolist) (symbolist.ai)<br>A digital marketing and CRM agency based in Lille, euraNov aims to enhance businesses' digital performance and streamline innovative solutions implementation | IT Services and IT Consulting | 🇫🇷 Lille | 11 | 2015 |
| 21 | [AFIGEC AUDIT HDF](https://www.tamtam.ai/c/afigec-audit-hdf) (altusfortin.fr)<br>Accounting firm located in Lille, France, offering professional services in financial management, tax preparation, and auditing for businesses and individuals | Business Consulting and Services | 🇫🇷 Lille | 10 | 1983 |
| 22 | [Point Triple](https://www.tamtam.ai/c/point-triple) (pointtriple.com)<br>Group of senior entrepreneurs and experts providing holistic, strategic, and creative consulting solutions focused on impactful, efficient models serving organizations and the planet. | Advertising Services | 🇫🇷 Lille | 9 | 2019 |
| 23 | [SCHOLA INGENIERIE](https://www.tamtam.ai/c/schola-ingenierie) (schola-ingenierie.fr)<br>The company is a training organization and consulting firm specializing in quality compliance, regulatory compliance, and training for employees and training teams | Professional Training and Coaching | 🇫🇷 Lille | 8 | 2016 |
| 24 | [NEOBIZ](https://www.tamtam.ai/c/neobiz) (neo-biz.fr)<br>Operational consulting agency specializing in B2B commercial development, delivering qualified leads and business meetings to accelerate client growth. | International Trade and Development | 🇫🇷 Lille | 7 | 2010 |
| 25 | [Cabinet Michel Simond Hauts de France](https://www.tamtam.ai/c/cabinet-michel-simond-hauts-de-france) (msimond.fr)<br>The company provides confidential support for buying and selling businesses and commercial properties, specializing in Mergers and Acquisitions | Leasing Non-residential Real Estate | 🇫🇷 Lille | 7 |  |
| 26 | [Cécile Boury Conseil International](https://www.tamtam.ai/c/cecile-boury-conseil-international) (cbci-france.eu)<br>Assists companies with international business, offering strategic and operational support for commercial and marketing development, including export projects and market entry. | International Trade and Development | 🇫🇷 Lille | 6 | 2010 |
| 27 | [FCD conseil](https://www.tamtam.ai/c/fcd-conseil)<br>Specializing in restaurant creation and development, we offer comprehensive services including market research, legal assistance, business planning, financing, branding, and staff recruitment | Restaurants | 🇫🇷 Lille | 4 | 2015 |
| 28 | [SOCO&FI (Société Conseil & Finances)](https://www.tamtam.ai/c/soco-and-fi-societe-conseil-and-finances) (socoandfi.fr)<br>A consulting firm specializing in supporting SMEs, startups, and social economy structures in strategy and financial engineering to optimize decision-making and performance | Business Consulting and Services | 🇫🇷 Lille | 4 | 2011 |
| 29 | [Tidjee](https://www.tamtam.ai/c/tidjee) (tidjee.com)<br>A specialized consulting firm focusing on innovation transformation and financing Offers decision support, execution security, and launches projects in training, automation, and AI | Business Consulting and Services | 🇫🇷 Lille | 2 | 2016 |
| 30 | [NSP Expertise](https://www.tamtam.ai/c/nsp-expertise) (nsp-expertise.com)<br>NSP EXPERTISE is a procurement services company focused on improving profitability and creating savings through innovative and pragmatic solutions Contact us for potential savings evaluation | Business Consulting and Services | 🇫🇷 Lille | 2 | 2014 |

## 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.

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Source: https://www.tamtam.ai/l/consulting-firms-lille