# Top 30 consulting firms in the Rh么ne department
Tamtam tracks 242 consulting firms headquartered in the Rh么ne department. This list ranks the 30 largest by number of employees on LinkedIn, led by In Extenso, EFOR and entreprise individuelle. Their median headcount is 434. Half of them were founded in 1991 or later. The most common headquarters are Lyon (19), Villeurbanne (5) and 脡cully (2).
The Rh么ne department features a concentration of consulting firms, primarily mid-sized, with a strong presence in IT services and business consulting. Notable companies include In Extenso, a French accounting leader; EFOR, which supports pharmaceutical and medtech companies; SOLUTEC, providing IT engineering and consulting; and CTC, offering solutions for the leather, footwear, and textile industries. Many of these firms were founded in the 1990s and 2000s, reflecting a period of growth in specialized services.
A significant pattern is the prevalence of companies headquartered in Lyon and Villeurbanne, indicating these cities as key hubs for consulting activities within the region. The sector is diverse, spanning from accounting and HR to IT and environmental services, suggesting a broad demand for expert advice across various industries.
馃嚝馃嚪 Rh么ne 路 30 companies 路 Updated Nov 11, 2026
| # | Company | Industry | Headquarters | Employees | Founded |
|---|---|---|---|---|---|
| 1 | [In Extenso](https://www.tamtam.ai/c/in-extenso) (inextenso.fr)
French accounting leader with broad services for businesses. Offers accounting, administrative, legal, tax, social, M&A, tourism, wealth, innovation, and legal advice. | Accounting | 馃嚝馃嚪 Lyon | 3,533 | 1991 |
| 2 | [EFOR](https://www.tamtam.ai/c/efor) (efor-group.com)
supports pharmaceutical, biotech, and medtech companies in ensuring production compliance and expediting the market launch of safe and effective medical products | Business Consulting and Services | 馃嚝馃嚪 Champagne-au-Mont-d'Or | 2,913 | 2013 |
| 3 | [entreprise individuelle](https://www.tamtam.ai/c/entreprise-individuelle) (grandclement.fr)
This company specializes in web development, SEO, online advertising campaigns, VBNet development, e-commerce, Access development, training, and consulting for SMEs | Software Development | 馃嚝馃嚪 Lyon | 2,587 | 2001 |
| 4 | [STS](https://www.tamtam.ai/c/sts-lyon) (sts-certified.com)
Technical advisory and conformity assessment services for solar and storage components, including manufacturing audits and inspections for global renewable energy project developers. | Renewables & Environment | 馃嚝馃嚪 Lyon | 1,900 | 2010 |
| 5 | [SOLUTEC](https://www.tamtam.ai/c/solutec) (solutec.fr)
Provides IT engineering, consulting, and services. Supports clients through project phases like management, infrastructure, operations, and coordination across various sectors. | IT Services and IT Consulting | 馃嚝馃嚪 Villeurbanne | 1,659 | 1991 |
| 6 | [CTC](https://www.tamtam.ai/c/ctc-lyon) (ctcgroupe.com)
CTC offers cross-disciplinary solutions for the leather, footwear, and textile industries, focusing on ethical practices, cost savings, waste reduction, and performance improvement worldwide | International Trade and Development | 馃嚝馃嚪 Lyon | 1,622 | 1899 |
| 7 | [Domino RH](https://www.tamtam.ai/c/domino-rh) (domino-rh.com)
Established in 1999, this group offers temporary assignments, recruitment, training, HR consulting, and management services with a national network across France and expanding internationally | Human Resources Services | 馃嚝馃嚪 Lyon | 1,144 | 1999 |
| 8 | [Coexya](https://www.tamtam.ai/c/coexya) (coexya.eu)
Offers IT services, specializing in data valuation across customer experience, content, health, legal, location intelligence, and smart data for clients. | IT Services and IT Consulting | 馃嚝馃嚪 Saint-Didier-au-Mont-d'Or | 835 | |
| 9 | [Cabinet Merlin](https://www.tamtam.ai/c/cabinet-merlin) (cabinet-merlin.fr)
Consulting and engineering services for water production, wastewater treatment, waste management, energy production, urban planning, and mobility for local authorities and industries. | Environmental Services | 馃嚝馃嚪 Lyon | 589 | 1922 |
| 10 | [Alteca](https://www.tamtam.ai/c/alteca) (alteca.fr)
Supports clients in digital transformation projects, utilizing expertise in dematerialization, mobile applications, IoT, business intelligence, and Big Data. | IT Services and IT Consulting | 馃嚝馃嚪 Villeurbanne | 586 | 1996 |
| 11 | [CONSULTYS](https://www.tamtam.ai/c/consultys) (consultys.com)
Provides engineering, production, quality, R&D, and regulatory affairs consulting services to the bio industry for drug development projects. | Pharmaceutical Manufacturing | 馃嚝馃嚪 Lyon | 550 | 2005 |
| 12 | [Endrix](https://www.tamtam.ai/c/endrix) (endrix.com)
Team of 200 professionals supporting over 5000 clients with ISO 9001 certified quality, specialized technology, and expert business performance services. | Business Consulting and Services | 馃嚝馃嚪 Lyon | 515 | 1978 |
| 13 | [implid](https://www.tamtam.ai/c/implid) (implid.com)
With over 40 years of experience, our team specializes in helping businesses improve organization, regulatory compliance, and system performance across various regions | Business Consulting and Services | 馃嚝馃嚪 Lyon | 512 | 1973 |
| 14 | [ING'EUROP](https://www.tamtam.ai/c/ing-europ) (ing-europ.com)
Specializes in engineering large industrial projects, managing from project control to assembly coordination, testing, and commissioning processes. | Business Consulting and Services | 馃嚝馃嚪 脡cully | 501 | 1989 |
| 15 | [delaware France](https://www.tamtam.ai/c/delaware-france) (delaware.pro)
Helps companies with daily IT system use, guiding business transformation, deploying SAP and Microsoft solutions, and providing after-sales service. | IT Services and IT Consulting | 馃嚝馃嚪 Villeurbanne | 434 | 2003 |
| 16 | [Percall Group](https://www.tamtam.ai/c/percall-group) (percallgroup.com)
French IT engineering services company, specializing in CAD, PLM, and IoT software integration for major high-tech industries, a PTC partner. | IT Services and IT Consulting | 馃嚝馃嚪 Lyon | 347 | 2000 |
| 17 | [PIMAN Group](https://www.tamtam.ai/c/piman-group) (piman-group.fr)
Consulting in industrial project and investment management for large industrial groups and SMEs, nationally and internationally, since 2009. | Business Consulting and Services | 馃嚝馃嚪 Limonest | 331 | 2009 |
| 18 | [EODD ing茅nieurs conseils](https://www.tamtam.ai/c/eodd-ingenieurs-conseils) (eodd.fr)
Provides expert ecological transition consulting and engineering services for sustainable projects, offering solutions for urban planning, energy, biodiversity, and waste management. | Environmental Services | 馃嚝馃嚪 Villeurbanne | 319 | 1991 |
| 19 | [Amiltone](https://www.tamtam.ai/c/amiltone) (amiltone.com)
Partner in digital projects since 2012, specializing in user-centered design, data-driven strategies, AI integration, automated deployment, and cloud/on-premise infrastructure scaling Transforming businesses digitally | IT Services and IT Consulting | 馃嚝馃嚪 Villeurbanne | 311 | 2012 |
| 20 | [GUARAN脥](https://www.tamtam.ai/c/guarani) (guarani.fr)
Provides digital services to over 150 partner companies with expertise, openness, support, and responsibility, fostering individual growth in a healthy environment. | IT Services and IT Consulting | 馃嚝馃嚪 Lyon | 303 | |
| 21 | [ERAS Engineering](https://www.tamtam.ai/c/eras-engineering) (eras.com)
Providing high value-added engineering services for medium scale projects in chemicals, food, pharmaceuticals, cosmetics, and energy sectors. | Mechanical Or Industrial Engineering | 馃嚝馃嚪 Lyon | 292 | 1991 |
| 22 | [CCI Lyon M茅tropole Saint-Etienne Roanne](https://www.tamtam.ai/c/cci-lyon-metropole-saint-etienne-roanne) (lyon-metropole.cci.fr)
Supporting businesses, shop owners, and entrepreneurs in Lyon, Rh么ne, and Loire regions to enhance competitiveness and manage key infrastructure for regional attractiveness | Government Administration | 馃嚝馃嚪 Lyon | 290 | 1833 |
| 23 | [Alixio Mobilit茅](https://www.tamtam.ai/c/alixio-mobilite) (alixiomobilite.fr)
Specializes in professional mobility and career transition support, offering tailored solutions respecting organizational culture and human challenges. | Human Resources Services | 馃嚝馃嚪 Lyon | 279 | |
| 24 | [ABGi France](https://www.tamtam.ai/c/abgi-france) (abgi-france.com)
Support clients in structuring, financing, and executing research, development, innovation, operational optimization, technology adoption, and sustainable transformation projects internationally. | Business Consulting and Services | 馃嚝馃嚪 Lyon | 261 | 1990 |
| 25 | [Algo茅](https://www.tamtam.ai/c/algoe) (algoe.fr)
A management consulting firm specializing in projects, organization, development, and HR, offering independent support and expertise in organizational transformation and operational performance | Business Consulting and Services | 馃嚝馃嚪 脡cully | 246 | 1959 |
| 26 | [APLUSA](https://www.tamtam.ai/c/aplusa) (aplusaresearch.com)
A global healthcare market research consultancy specializing in brand performance monitoring, patient journey assessments, and real-world data insights for informed business decisions | Business Consulting and Services | 馃嚝馃嚪 Lyon | 246 | 1990 |
| 27 | [IM Projet](https://www.tamtam.ai/c/im-projet) (improjet.fr)
Specializing in managing complex projects across various sectors, providing organization, planning, coordination, and tools for project success Emphasis on team collaboration and professional development | Business Consulting and Services | 馃嚝馃嚪 Lyon | 243 | 1989 |
| 28 | [3C Expertises](https://www.tamtam.ai/c/3c-expertises) (3c-expertises.fr)
A team of engineers, architects, and building technicians dedicated to serving insurers in various construction damage domains with competence and efficiency | Construction | 馃嚝馃嚪 Lyon | 242 | 2015 |
| 29 | [Orial](https://www.tamtam.ai/c/orial) (orial.fr)
Independent accounting, audit, and social services firm operating across Lyon, Paris, Valr茅as, and Villefranche sur Sa么ne for professional business support and advisory. | Accounting | 馃嚝馃嚪 Lyon | 233 | |
| 30 | [SRA](https://www.tamtam.ai/c/sra) (groupe-sra.fr)
The company specializes in optimizing information systems for businesses, offering sustainable management solutions, technical expertise, and personalized service across various locations | Software Development | 馃嚝馃嚪 Bron | 212 | 1984 |
## 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 Rh么ne department
- [The largest companies in the Rh么ne department](https://www.tamtam.ai/l/largest-companies-rhone) (4,813)
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- [Distributors and wholesalers in the Rh么ne department](https://www.tamtam.ai/l/distributors-and-wholesalers-rhone) (185)
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- [Events Services companies in the Rh么ne department](https://www.tamtam.ai/l/events-services-companies-rhone) (126)
## The same list elsewhere in France
- [Consulting firms in France](https://www.tamtam.ai/l/consulting-firms-france) (4,252)
- [Consulting firms in 脦le-de-France](https://www.tamtam.ai/l/consulting-firms-ile-de-france) (2,408)
- [Consulting firms in the Hauts-de-Seine department](https://www.tamtam.ai/l/consulting-firms-hauts-de-seine) (563)
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- [Consulting firms in the Nord department](https://www.tamtam.ai/l/consulting-firms-nord) (115)
- [Consulting firms in Brittany](https://www.tamtam.ai/l/consulting-firms-brittany) (99)
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Source: https://www.tamtam.ai/l/consulting-firms-rhone