# Top 30 professional services firms in Levallois-Perret

Tamtam tracks 85 professional services firms headquartered in Levallois-Perret. This list ranks the 30 largest by number of employees on LinkedIn, led by Devoteam, Forvis Mazars Group and SQLI. Their median headcount is 379. Half of them were founded in 2001 or later.

The professional services firms in Levallois-Perret are primarily large to mid-sized companies specializing in IT services, consulting, and accounting. Many are focused on digital transformation, data, and technology. Notable examples include Devoteam, an AI-driven tech consulting firm, Forvis Mazars Group, an international audit and advisory service, and SQLI, a European group for customer experience and digital transformation.

A significant pattern among these companies is their specialization in digital and technological solutions. Several firms, such as Micropole and Jems Group, focus on data and AI, while others like Ayming and NEO2 provide specialized consulting in areas like innovation, HR, and engineering.

🇫🇷 Levallois-Perret · 30 companies · Updated Nov 13, 2026

| # | Company | Industry | Headquarters | Employees | Founded |
|---|---|---|---|---|---|
| 1 | [Devoteam](https://www.tamtam.ai/c/devoteam) (devoteam.com)<br>AI-driven tech consulting firm specializing in cloud platforms, cyber, data, and sustainability, guiding businesses through sustainable digital transformation to deliver value. | Business Consulting and Services | 🇫🇷 Levallois-Perret | 10,274 |  |
| 2 | [Forvis Mazars Group](https://www.tamtam.ai/c/forvis-mazars-group) (forvismazars.com)<br>International partnership delivering audit, tax, and advisory services across one hundred countries and territories through an integrated global professional services network. | Accounting | 🇫🇷 Levallois-Perret | 9,534 |  |
| 3 | [SQLI](https://www.tamtam.ai/c/sqli) (sqli.com)<br>Leading European group for customer experience and digital transformation services. Empowering international brands with digital innovation, combining technology, methodologies, and AI for business growth. | IT Services and IT Consulting | 🇫🇷 Levallois-Perret | 2,854 | 1990 |
| 4 | [Ayming](https://www.tamtam.ai/c/ayming) (ayming.com)<br>Partners with businesses, institutions to unlock lasting value. Translates policy into opportunities, manages growth transformation. Specializes in innovation, HR, taxes across 14 countries. Delivers tangible results beyond consulting. | Business Consulting and Services | 🇫🇷 Levallois-Perret | 1,947 | 1986 |
| 5 | [Staffmatch](https://www.tamtam.ai/c/staffmatch) (staffmatch.com)<br>Revolutionizes temporary work market by integrating digital solutions with a network of physical agencies, providing staffing services across France. | Human Resources Services | 🇫🇷 Levallois-Perret | 1,512 | 2015 |
| 6 | [IKOS GROUP](https://www.tamtam.ai/c/ikos-group) (ikosconsulting.com)<br>Technology consulting firm specializing in railway engineering and energy solutions, providing technical assistance and strategic advice for clients' projects worldwide. | Rail Transportation | 🇫🇷 Levallois-Perret | 1,191 | 2005 |
| 7 | [Argon & Co](https://www.tamtam.ai/c/argon-and-co) (argonandco.com)<br>Global management consultancy specializing in operations strategy, supply chain, manufacturing, logistics, procurement, finance, and shared services transformation. | Business Consulting and Services | 🇫🇷 Levallois-Perret | 870 |  |
| 8 | [Micropole](https://www.tamtam.ai/c/micropole) (micropole.com)<br>An international consulting group specializing in corporate transformation through data, offering expertise in 'Data Driven' Strategy, Cloud Acceleration, and Digital Business solutions | IT Services and IT Consulting | 🇫🇷 Levallois-Perret | 803 | 1987 |
| 9 | [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 |
| 10 | [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 |  |
| 11 | [MCA](https://www.tamtam.ai/c/mca-levallois-perret) (mca-groupe.com)<br>International engineering and high-tech company empowering talent, partnering with top companies to realize cutting-edge projects across Europe, with a strategic Nearshore Hub. | IT Services and IT Consulting | 🇫🇷 Levallois-Perret | 564 | 1991 |
| 12 | [ISOR](https://www.tamtam.ai/c/isor) (isor.fr)<br>Established in 1968, a French family-owned company specializing in industrial cleaning and related services, focusing on innovation, sustainability, and growth | Facilities Services | 🇫🇷 Levallois-Perret | 449 |  |
| 13 | [ALTI une société de Tata Consultancy Services](https://www.tamtam.ai/c/alti-une-societe-de-tata-consultancy-services) (alti.fr)<br>A subsidiary of Tata Consultancy Services, Alti provides high-level expertise in information systems consulting and engineering for businesses in France | IT Services and IT Consulting | 🇫🇷 Levallois-Perret | 430 |  |
| 14 | [Devoteam Digital Impulse](https://www.tamtam.ai/c/devoteam-digital-impulse) (devoteam.com)<br>Dedicated business consulting team specializing in driving digital transformation from strategy to execution, emphasizing bold decisions and innovative ideas Shift the game | Business Consulting and Services | 🇫🇷 Levallois-Perret | 412 | 1995 |
| 15 | [NEO2](https://www.tamtam.ai/c/neo2) (neo2.eu)<br>An engineering consultancy providing technical assistance and key personnel in oil & gas, water treatment, and power industries globally | Business Consulting and Services | 🇫🇷 Levallois-Perret | 379 | 2008 |
| 16 | [Devoteam \| Cyber Trust](https://www.tamtam.ai/c/devoteam-cyber-trust) (devoteam.com)<br>Empowering clients to protect digital transformation by managing risks and deploying innovative cybersecurity solutions, ensuring resilience in the digital age | IT Services and IT Consulting | 🇫🇷 Levallois-Perret | 374 | 1995 |
| 17 | [Devoteam \| AWS Partner](https://www.tamtam.ai/c/devoteam-aws-partner) (devoteam.com)<br>It is an AWS Premier Consulting Partner with over 450 experts, providing scalable infrastructure and innovative solutions across multiple European countries. | IT Services and IT Consulting | 🇫🇷 Levallois-Perret | 290 |  |
| 18 | [Ozitem](https://www.tamtam.ai/c/ozitem) (groupeozitem.com)<br>Supports customers with digital innovation. Provides IT and cloud infrastructure solutions, enabling clients to focus on their core business in the digital world. | IT Services and IT Consulting | 🇫🇷 Levallois-Perret | 285 | 1990 |
| 19 | [Amaris Group](https://www.tamtam.ai/c/amaris-group) (groupamaris.com)<br>Engineering consulting company specializing in project management and manufacturing/assembly monitoring, providing tailored services to clients in France and abroad with a focus on consultant development | Business Consulting and Services | 🇫🇷 Levallois-Perret | 153 | 1999 |
| 20 | [DAVRICOURT \| Certified Positive Company](https://www.tamtam.ai/c/davricourt-certified-positive-company) (davricourt.com)<br>Provides consulting and recruitment services in industry, focusing on sustainable practices and employee well-being, collaborating with international groups across various sectors. | Business Consulting and Services | 🇫🇷 Levallois-Perret | 153 | 2011 |
| 21 | [HARINGTON](https://www.tamtam.ai/c/harington) (harington.fr)<br>Provides technology and digital consulting services, helping companies innovate, maintain competitiveness, evolve business models, and optimize operations through various tech offerings. | IT Services and IT Consulting | 🇫🇷 Levallois-Perret | 148 | 2008 |
| 22 | [UTI-Group](https://www.tamtam.ai/c/uti-group) (uti-group.fr)<br>UTiGROUP is a group of IT engineering services companies specialized in management computing, offering consulting, engineering, and integration services with a focus on quality and client benefits | IT Services and IT Consulting | 🇫🇷 Levallois-Perret | 142 | 1986 |
| 23 | [Steamo](https://www.tamtam.ai/c/steamo) (steamo.fr)<br>Specialist in property management and multitechnical maintenance across various sectors including offices, retail, luxury, hospitality, and regulated sites nationwide. | Retail Office Equipment | 🇫🇷 Levallois-Perret | 135 | 2008 |
| 24 | [Marquetis&Co](https://www.tamtam.ai/c/marquetis-and-co) (marquetis.fr)<br>Develops relational brand strategies, manages operational profitability, and offers communication, call center, and local intelligence solutions for client success. | Advertising Services | 🇫🇷 Levallois-Perret | 132 | 1996 |
| 25 | [Novadis](https://www.tamtam.ai/c/novadis) (novadis.eu)<br>With 10 years of experience in safety, Novadis helps create convergent and interoperable solutions to bring visions to life | IT Services and IT Consulting | 🇫🇷 Levallois-Perret | 117 | 2006 |
| 26 | [Devoteam \| ServiceNow Partner](https://www.tamtam.ai/c/devoteam-servicenow-partner) (devoteam.com)<br>A leading provider in EMEA, leveraging the Now Platform since 2009 to deliver digital workflows that enhance productivity and elevate customer experiences | IT Services and IT Consulting | 🇫🇷 Levallois-Perret | 116 | 1995 |
| 27 | [LSI](https://www.tamtam.ai/c/lsi) (lsi-group.com)<br>International consulting group specializing in healthcare industry for pharma, biotech, medical devices and cosmetics clients, offering audit, training, and consulting across product lifecycles. | Pharmaceutical Manufacturing | 🇫🇷 Levallois-Perret | 111 | 2017 |
| 28 | [Devoteam S Platform](https://www.tamtam.ai/c/devoteam-s-platform) (devoteam.com)<br>A global leader in Salesforce technologies, providing end-to-end solutions to +300 clients in 10 countries to accelerate sales and marketing effectiveness | IT Services and IT Consulting | 🇫🇷 Levallois-Perret | 101 | 2017 |
| 29 | [Eloquant](https://www.tamtam.ai/c/eloquant) (eloquant.com)<br>It specializes in customer relationship solutions, offering dialogue management and feedback analysis through a SaaS platform for various clients. | Software Development | 🇫🇷 Levallois-Perret | 98 | 2001 |
| 30 | [Axido](https://www.tamtam.ai/c/axido) (axido.fr)<br>Provides IT support, cybersecurity, cloud migration, and collaboration solutions to SMEs and mid-sized companies with certified expertise. | IT Services and IT Consulting | 🇫🇷 Levallois-Perret | 97 | 2003 |

## 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 13, 2026.

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Source: https://www.tamtam.ai/l/professional-services-firms-levallois-perret