# List of consulting firms in the Hérault department

Tamtam tracks 39 consulting firms headquartered in the Hérault department. This list ranks the 30 largest by number of employees on LinkedIn, led by Biotope, Acelys Services Numériques and AXIOME ASSOCIES. Their median headcount is 30. Half of them were founded in 2008 or later. The most common headquarters are Montpellier (16), Lattes (3) and Castelnau-le-Lez (2).

The consulting firms in Hérault primarily cover IT services, environmental consulting, and accounting. Biotope, with 585 employees, specializes in ecological engineering. Acelys Services Numériques focuses on software development and cybersecurity, while AXIOME ASSOCIES offers accounting and IT engineering. Groupe ISIA is active in responsible digital transformation.

A common pattern among these firms is their founding dates. Most were established between the mid-1990s and the early 2010s, indicating a sector that has matured over the last few decades. Several companies, including devensys cybersecurity and Ziwit, are based in Montpellier, highlighting the city as a hub for these activities.

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

| # | Company | Industry | Headquarters | Employees | Founded |
|---|---|---|---|---|---|
| 1 | [Biotope](https://www.tamtam.ai/c/biotope) (biotope.fr)<br>A leading French ecological engineering and nature conservation company with over 240 employees, 25 sites, operations in 40+ countries, and diverse services | Environmental Services | 🇫🇷 Mèze | 585 | 1993 |
| 2 | [Acelys Services Numériques](https://www.tamtam.ai/c/acelys-services-numeriques) (acelys.fr)<br>An independent ESN in Montpellier, specializing in software development, business intelligence, dematerialization, cybersecurity, and infrastructure, with a focus on talent development and internal promotion | Software Development | 🇫🇷 Montpellier | 175 | 1997 |
| 3 | [AXIOME ASSOCIES](https://www.tamtam.ai/c/axiome-associes) (axiomeassocies.fr)<br>Regional accounting firm providing auditing, social management, wealth management, taxation, consulting, and IT engineering services to small and medium enterprise directors. | Accounting | 🇫🇷 Jacou | 151 | 1986 |
| 4 | [Cerfrance Midi Méditerranée](https://www.tamtam.ai/c/cerfrance-midi-mediterranee) (midi-mediterranee.cerfrance.fr)<br>It is a cooperative network providing accounting and consulting services to various sectors, emphasizing human governance and client success. | Accounting | 🇫🇷 Lattes | 136 | 1960 |
| 5 | [Groupe ISIA](https://www.tamtam.ai/c/groupe-isia) (groupe-isia.com)<br>This company specializes in responsible digital transformation services, including digital frescoes, web eco-design, accessibility audits, and carbon footprint measurement | IT Services and IT Consulting | 🇫🇷 Saint-Mathieu-de-Tréviers | 107 | 1996 |
| 6 | [devensys cybersecurity](https://www.tamtam.ai/c/devensys-cybersecurity) (devensys.com)<br>French cybersecurity company, 13 years old, part of the Inherent group. Provides expert, quality, and ethical cybersecurity services with a 100% French guarantee. | Computer and Network Security | 🇫🇷 Montpellier | 93 | 2013 |
| 7 | [Synanto](https://www.tamtam.ai/c/synanto) (synanto.fr)<br>This is a human-sized ESN offering stimulating missions, career development, and expert consulting services, primarily in banking, finance, and insurance sectors. | IT Services and IT Consulting | 🇫🇷 Montpellier | 82 | 2007 |
| 8 | [SORECO](https://www.tamtam.ai/c/soreco-montpellier) (groupesoreco.fr)<br>Specialized payroll and HR consulting for the transport sector, focusing on social charge savings, GDPR compliance, and TICPE reimbursement across France. | Human Resources Services | 🇫🇷 Montpellier | 81 | 1992 |
| 9 | [Proxiel](https://www.tamtam.ai/c/proxiel) (proxiel.com)<br>French digital services company provides IT maintenance, software development, and IT solutions, with a training hub for skill development for employees and partners. | IT Services and IT Consulting | 🇫🇷 Montpellier | 68 | 1999 |
| 10 | [Primum Non Nocere](https://www.tamtam.ai/c/primum-non-nocere) (agenceprimum.fr)<br>Support organizations in reducing environmental, social, and societal impacts through personalized solutions including RSE/RSO diagnostics, carbon audits, and eco-design. | Environmental Services | 🇫🇷 Béziers | 46 | 2009 |
| 11 | [ROYER ROBIN Associés](https://www.tamtam.ai/c/royer-robin-associes) (royerrobin.com)<br>Since 1995, this company provides tailored solutions in consulting, auditing, and training to improve individual and collective performance across various sectors and structures | Higher Education | 🇫🇷 Lattes | 44 | 1995 |
| 12 | [Groupe DMM](https://www.tamtam.ai/c/groupe-dmm) (groupedmm.com)<br>Develops human skills through tailor-made training programs and support initiatives for executives, managers, and employees to tackle professional challenges. | Professional Training and Coaching | 🇫🇷 Saint-Aunès | 43 | 1994 |
| 13 | [IOcean](https://www.tamtam.ai/c/iocean) (iocean.fr)<br>Provides IT engineering, focusing on custom web software development, Intranets, Extranets, and management software, utilizing OpenSource solutions like Java and PHP. | IT Services and IT Consulting | 🇫🇷 Montpellier | 37 | 2001 |
| 14 | [MoveWORK Group](https://www.tamtam.ai/c/movework-group) (movework.com)<br>Offers a human-centric platform leveraging Big Data, AI, and IoT for coordinating facility services, improving quality of life at work and public places. | IT Services and IT Consulting | 🇫🇷 Montpellier | 32 | 2010 |
| 15 | [Ziwit](https://www.tamtam.ai/c/ziwit) (ziwit.com)<br>A cybersecurity company offering training, audits, SSL certificates, and SaaS solutions to protect organizations from hacking and ensure compliance | Computer and Network Security | 🇫🇷 Montpellier | 30 | 2011 |
| 16 | [P3G Ingénierie](https://www.tamtam.ai/c/p3g-ingenierie)<br>A multidisciplinary engineering firm specializing in building design and construction, with expertise in sustainable practices and renewable energy Collaborates with architects for shared projects | Construction | 🇫🇷 Montpellier | 20 | 1992 |
| 17 | [Egalité à la page](https://www.tamtam.ai/c/egalite-a-la-page) (egalitealapage.com)<br>Consulting and training firm specialized in supporting professionals involved in victim support and handling workplace violence situations through strategic advice and process implementation | Business Consulting and Services | 🇫🇷 Montpellier | 19 | 2016 |
| 18 | [Fruition Sciences - 360viti](https://www.tamtam.ai/c/fruition-sciences-360viti) (fruitionsciences.com)<br>Offers data-based solutions and advice to winemakers and vineyard managers, promoting sustainable practices and helping understand yield and fruit quality drivers. | Farming | 🇫🇷 Montpellier | 15 | 2008 |
| 19 | [Groupe Élan (Cabinet d'études et de conseils)](https://www.tamtam.ai/c/groupe-elan-cabinet-d-etudes-et-de-conseils) (elangroupe.eu)<br>For 20 years, a consulting firm based in Montpellier and La Réunion supports various entities in successful project management with multidisciplinary expertise | Engineering Services | 🇫🇷 Montpellier | 14 | 2003 |
| 20 | [JUBEA 🚀](https://www.tamtam.ai/c/jubea) (jubea.fr)<br>Founded in 2012, JUBEA facilitates innovation for startups and companies by supporting strategic financing, structuring, and managing innovative projects | Business Consulting and Services | 🇫🇷 Lattes | 14 | 2012 |
| 21 | [Ingévin](https://www.tamtam.ai/c/ingevin) (ingevin.com)<br>A leading design consultancy for wineries, specializing in modernization to improve quality, energy efficiency, and operational efficiency while securing optimal costs | Engineering Services | 🇫🇷 Montpellier | 13 | 1997 |
| 22 | [Rational Consulting](https://www.tamtam.ai/c/rational-consulting) (rationalconsulting.fr)<br>Optimize enterprise management through ERP, CRM, WMS software implementation and improvement, ensuring ROI in high-stakes business contexts. | Business Consulting and Services | 🇫🇷 Montpellier | 13 | 2010 |
| 23 | [La TeleScop](https://www.tamtam.ai/c/la-telescop) (latelescop.fr)<br>A cooperative company providing remote sensing, mapping, and support for public policies, specializing in spatial data for environmental and territorial planning | Environmental Services | 🇫🇷 Castelnau-le-Lez | 8 | 2018 |
| 24 | [2PN audit & expertise](https://www.tamtam.ai/c/2pn-audit-and-expertise) (2pn-expertise.com)<br>A multidisciplinary firm in Southern France providing tailored accounting, auditing, and consulting services to businesses of all sizes and stages | Accounting | 🇫🇷 Vendres | 7 | 2017 |
| 25 | [LORANG](https://www.tamtam.ai/c/lorang) (lorang-innovation.com)<br>A French service company specializing in innovative project engineering under European funding programs, offering guidance, proposal writing, project management, and partnership services | Management Consulting | 🇫🇷 Montpellier | 7 | 1996 |
| 26 | [Innovadrinks SAS](https://www.tamtam.ai/c/innovadrinks-sas) (innovadrinks.com)<br>Innovadrinks supports projects and startups in the innovative beverage market, providing project audits, formulation, technical support, and production services They also assist in financing | Food and Beverage Manufacturing | 🇫🇷 Saint-Clément-De-Rivière | 7 | 2018 |
| 27 | [Opens](https://www.tamtam.ai/c/opens) (open-s.fr)<br>The company specializes in quality management, skill development, digitalization for organizations, and professional guidance, action planning, and change management for individuals | Business Consulting and Services | 🇫🇷 Castelnau-le-Lez | 6 | 2019 |
| 28 | [Hortus Technologies](https://www.tamtam.ai/c/hortus-technologies) (hortus-technologies.com)<br>Designs high-performance, reliable embedded electronics, radio frequency, and IoT solutions. Supports companies from feasibility to industrialization, considering all product lifecycle aspects. | Engineering Services | 🇫🇷 Montpellier | 6 | 2022 |
| 29 | [GA Solutions](https://www.tamtam.ai/c/ga-solutions) (ga-solutions.com)<br>The company offers coaching services to individuals and teams in professional, managerial, and organizational contexts, focusing on creating sustainable and holistic development | Business Consulting and Services | 🇫🇷 Baillargues | 4 | 2016 |
| 30 | [10gital](https://www.tamtam.ai/c/10gital) (10gital.fr)<br>Support companies in defining digital strategies, evolving production and communication tools, and providing web training for digital transformation. | Technology, Information and Internet | 🇫🇷 Saint-Jean-de-Védas | 4 | 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 Hérault department

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- [IT Services and IT Consulting companies in the Hérault department](https://www.tamtam.ai/l/it-services-and-it-consulting-companies-herault) (57)
- [Real Estate companies in the Hérault department](https://www.tamtam.ai/l/real-estate-companies-herault) (56)
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- [Family-owned companies in the Hérault department](https://www.tamtam.ai/l/family-owned-companies-herault) (50)
- [Law Practice companies in the Hérault department](https://www.tamtam.ai/l/law-practice-companies-herault) (49)
- [Accounting firms in the Hérault department](https://www.tamtam.ai/l/accounting-firms-herault) (48)
- [Healthcare providers in the Hérault department](https://www.tamtam.ai/l/healthcare-providers-herault) (48)
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- [Distributors and wholesalers in the Hérault department](https://www.tamtam.ai/l/distributors-and-wholesalers-herault) (48)
- [Pharmaceutical companies in the Hérault department](https://www.tamtam.ai/l/pharmaceutical-companies-herault) (44)

## The same list elsewhere in France

- [Consulting firms in France](https://www.tamtam.ai/l/consulting-firms-france) (4,252)
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- [Consulting firms in Occitanie](https://www.tamtam.ai/l/consulting-firms-occitanie) (236)
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- [Consulting firms in Levallois-Perret](https://www.tamtam.ai/l/consulting-firms-levallois-perret) (83)
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Source: https://www.tamtam.ai/l/consulting-firms-herault