# 30 leading professional services firms in Montpellier

Tamtam tracks 49 professional services firms headquartered in Montpellier. This list ranks the 30 largest by number of employees on LinkedIn, led by ALTRAD, Crystal and Groupe PSI Sécurité. Their median headcount is 18. Half of them were founded in 1999 or later.

These Montpellier-based professional services firms are predominantly mid-sized to large companies, with a significant presence in industrial services, financial services, and IT. ALTRAD, for instance, is a global provider of industrial services and equipment. Crystal specializes in wealth management, while Groupe PSI Sécurité offers private security and safety services. Acelys Services Numériques focuses on software development, and Dalkia Air Solutions provides compressed air solutions. SORECO offers payroll and HR consulting for the transport sector.

The companies on this list show a mix of industries, with a strong emphasis on business-to-business services. Many of these firms were founded in the 1990s, indicating a period of growth and establishment for professional services in the region. The presence of companies like Numalis highlights a more recent trend towards specialized AI and software development.

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

| # | Company | Industry | Headquarters | Employees | Founded |
|---|---|---|---|---|---|
| 1 | [ALTRAD](https://www.tamtam.ai/c/altrad) (altrad.com)<br>Global provider of industrial services and equipment manufacturing, offering high-value solutions across energy, oil & gas, construction, and environmental sectors. | Environmental Services | 🇫🇷 Montpellier | 52,000 | 1985 |
| 2 | [Crystal](https://www.tamtam.ai/c/crystal) (groupe-crystal.com)<br>Leading independent wealth management advisor, offering private client services, investment solutions for professionals, and digital platforms for independent wealth managers, with national and international reach. | Financial Services | 🇫🇷 Montpellier | 817 | 1992 |
| 3 | [Groupe PSI Sécurité](https://www.tamtam.ai/c/groupe-psi-securite) (psisecurite.fr)<br>With 24 years of experience, this company specializes in private security and safety services, offering a comprehensive range to become regional leaders | Security and Investigations | 🇫🇷 Montpellier | 181 | 1998 |
| 4 | [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 |
| 5 | [Dalkia Air Solutions](https://www.tamtam.ai/c/dalkia-air-solutions) (dalkiaairsolutions.fr)<br>Provides solutions for compressed air, nitrogen, and breathable air production, treatment, and networks, focusing on energy performance improvement for industrial and nuclear clients. | Industrial Machinery Manufacturing | 🇫🇷 Montpellier | 138 | 1981 |
| 6 | [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 |
| 7 | [VIGIPHARM](https://www.tamtam.ai/c/vigipharm) (vigipharm.fr)<br>Specializing in health monitoring like pharmacovigilance, the company offers strategy development and surveillance services for pharmaceutical labs, founded in 1998 by Caroline Navarre | Pharmaceutical Manufacturing | 🇫🇷 Montpellier | 72 | 1998 |
| 8 | [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 |
| 9 | [Dimo Diagnostic](https://www.tamtam.ai/c/dimo-diagnostic) (dimo-diagnostic.net)<br>DIMO Diagnostic specializes in certified real estate diagnostics for individuals and professionals, focusing on customer satisfaction through human-centered service delivery | Research Services | 🇫🇷 Montpellier | 60 | 2016 |
| 10 | [STEAM France](https://www.tamtam.ai/c/steam-france) (steam.fr)<br>Provides equipment, maintenance, software, and consultancy services for hygiene, washing, decontamination, and sterilization processes with personalized support. | Medical Equipment Manufacturing | 🇫🇷 Montpellier | 60 | 1999 |
| 11 | [Numalis](https://www.tamtam.ai/c/numalis) (numalis.com)<br>Numalis develops tools and ISO standards to enhance AI adoption by designing robust and explainable algorithms, particularly for safety-critical industries like transportation and healthcare | Software Development | 🇫🇷 Montpellier | 24 | 2015 |
| 12 | [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 |
| 13 | [Arteba](https://www.tamtam.ai/c/arteba) (aplus-architecture.com)<br>Specializing in site management, Arteba provides coordination and project management services for public and private clients and architects since 1977 | Construction | 🇫🇷 Montpellier | 20 | 1977 |
| 14 | [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 |
| 15 | [CVH - Compétences et Valorisation de l'Humain](https://www.tamtam.ai/c/cvh-competences-et-valorisation-de-l-humain) (cvh34.com)<br>CVH offers personalized HR solutions including recruitment, HR consulting, career transition, skills assessment, and training, with a focus on individualized support | Professional Training and Coaching | 🇫🇷 Montpellier | 18 | 2005 |
| 16 | [LR AUDIT](https://www.tamtam.ai/c/lr-audit)<br>LR AUDIT is an accounting firm located in Montpellier, France, specializing in auditing and financial services for businesses | Accounting | 🇫🇷 Montpellier | 16 |  |
| 17 | [EMPLACEMENT N°1](https://www.tamtam.ai/c/emplacement-n-1) (emplacement-numero1.com)<br>Specialized group of agencies offering tailored legal solutions and commercial strategies for buying and selling businesses, with dedicated consultants in various sectors | Leasing Non-residential Real Estate | 🇫🇷 Montpellier | 15 | 2010 |
| 18 | [EXADEX SAS](https://www.tamtam.ai/c/exadex-sas) (exadex.fr)<br>A company in France specializing in legal services, including evidence preservation, judicial and amicable debt collection, and serving various clients since 1982 | Legal Services | 🇫🇷 Montpellier | 15 | 1982 |
| 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 | [Cabinet BREV&SUD](https://www.tamtam.ai/c/cabinet-brev-and-sud) (brevesud.fr)<br>A team of patent attorneys and engineers in France and Europe, providing legal advice and protection for industrial clients' innovations with a focus on proximity and efficiency | Law Practice | 🇫🇷 Montpellier | 14 | 1999 |
| 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 | [NOVALTUS](https://www.tamtam.ai/c/novaltus) (pkf-arsilon.com)<br>A dedicated accounting and audit firm providing personalized services to assist businesses with payroll, tax management, auditing, and business creation | Accounting | 🇫🇷 Montpellier | 13 | 2006 |
| 23 | [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 |
| 24 | [HORTUS AVOCATS](https://www.tamtam.ai/c/hortus-avocats) (hortusavocats.fr)<br>A legal services company specializing in public law, offering experience in all branches of the field with a dedicated and responsive team | Law Practice | 🇫🇷 Montpellier | 13 |  |
| 25 | [CABINET EMMANUEL CARREIRA](https://www.tamtam.ai/c/cabinet-emmanuel-carreira) (cabinet-carreira.fr)<br>An accounting firm based in Montpellier, France, specializing in expertise accounting services covering the Occitanie region with a human-centered approach | Accounting | 🇫🇷 Montpellier | 12 | 2016 |
| 26 | [AXIOME AUDIT](https://www.tamtam.ai/c/axiome-audit) (axiomeassocies.fr)<br>Providing professional auditing and accounting expertise for small to medium enterprises and non-profit organizations through quality proximity services since nineteen eighty-five. | Accounting | 🇫🇷 Montpellier | 11 | 1985 |
| 27 | [CBLC CONSEIL](https://www.tamtam.ai/c/cblc-conseil) (cblc.fr)<br>CBLC CONSEIL is an accounting consultancy located in Montpellier, France, providing expertise in financial matters for businesses and individuals | Accounting | 🇫🇷 Montpellier | 10 | 2008 |
| 28 | [BGE Montpellier Coeur d'Hérault Pays de Lunel](https://www.tamtam.ai/c/bge-montpellier-coeur-d-herault-pays-de-lunel) (creer.fr)<br>An independent network supporting business startups since 1979, focusing on job creation, sustainable development, and social cohesion Prioritizing personal respect and entrepreneurship for all | Professional Training and Coaching | 🇫🇷 Montpellier | 10 | 1980 |
| 29 | [ALCAMISI EXPERTISE](https://www.tamtam.ai/c/alcamisi-expertise) (alcamisi.fr)<br>A Montpellier-based accounting firm specializing in expertise, located at FUTURA 1ER ETAGE PARC 2000 | Accounting | 🇫🇷 Montpellier | 8 | 2009 |
| 30 | [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 |

## 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/professional-services-firms-montpellier