# 100 leading professional services firms in Pays de la Loire

Tamtam tracks 253 professional services firms headquartered in Pays de la Loire. This list ranks the 100 largest by number of employees on LinkedIn, led by Actual group, Samsic Facility and Experis France. Their median headcount is 164. Half of them were founded in 1996 or later. The most common headquarters are Nantes (22), Saint-Herblain (15) and Angers (11).

These are large and mid-sized professional services firms in Pays de la Loire. They cover a range of activities, including human resources, IT consulting, accounting, and industrial engineering. For example, Actual group specializes in temporary work and HR solutions, while Experis France supports digital transformation projects. FITECO focuses on accounting and tax regulation for entrepreneurs, and Parlym provides industrial engineering services from design to completion.

The companies listed exhibit a strong presence of IT services and consulting, with firms like TIBCO offering digital workplace and cybersecurity solutions, and Catamania providing digital transformation services for banking and insurance. Most of these companies, such as Baker Tilly France and Bessé, were founded in the 1960s and 1980s, indicating established players in their respective fields.

🇫🇷 Pays de la Loire · 100 companies · Updated Nov 14, 2026

| # | Company | Industry | Headquarters | Employees | Founded |
|---|---|---|---|---|---|
| 1 | [Actual group](https://www.tamtam.ai/c/actual-group) (groupeactual.eu)<br>French group specializing in temporary work, recruitment, training, and HR solutions, supporting job seekers and companies across multiple countries. | Human Resources Services | 🇫🇷 Laval | 5,932 | 1991 |
| 2 | [Samsic Facility](https://www.tamtam.ai/c/samsic-facility) (samsic-facility.fr)<br>Offers integrated business services: cleaning, security, maintenance, reception, landscaping, and logistics to improve working environments and occupant well-being across diverse sectors. | Facilities Services | 🇫🇷 Paris | 3,978 | 1986 |
| 3 | [Experis France](https://www.tamtam.ai/c/experis-france) (experisfrance.fr)<br>Supports DSI with innovative digital transformation projects, providing IT services and talent solutions to enhance organizational performance, addressing specific needs. | IT Services and IT Consulting | 🇫🇷 Nantes | 2,207 |  |
| 4 | [FITECO](https://www.tamtam.ai/c/fiteco) (fiteco.com)<br>Specialists in accounting, tax regulation, administrative tasks, and digital tools for entrepreneurs, agricultural businesses, and companies focused on CSR and future transmissions | Accounting | 🇫🇷 Changé | 1,937 | 1967 |
| 5 | [Parlym](https://www.tamtam.ai/c/parlym) (parlym.com)<br>Provides industrial engineering services, from design to turnkey project completion, across energy, chemical, industry, infrastructure, water, and environmental sectors, ensuring high quality and custom solutions. | Business Consulting and Services | 🇫🇷 Estaque | 1,606 | 1971 |
| 6 | [Baker Tilly France](https://www.tamtam.ai/c/baker-tilly-france) (bakertilly.fr)<br>Providing global professional services to businesses and governments, helping achieve goals, seize opportunities, and maintain competitiveness worldwide. | Business Consulting and Services | 🇫🇷 Angers | 1,324 | 1963 |
| 7 | [Alkera](https://www.tamtam.ai/c/alkera) (alkera.fr)<br>French independent group, risk and claims management for insurers, brokers, and businesses. Offers pre- and post-claim services, including audit, expertise, repair, and delegation. | Insurance | 🇫🇷 Clichy | 1,213 |  |
| 8 | [𝗚𝗘𝗢𝗙𝗜𝗧](https://www.tamtam.ai/c/company-nantes) (geofit.fr)<br>Designing geographical databases, securing land processes for private and development projects, producing national cartography, developing agriculture, and managing natural resources. | Space Research and Technology | 🇫🇷 Nantes | 1,157 | 1968 |
| 9 | [MCI SAS](https://www.tamtam.ai/c/mci-sas) (mci.fr)<br>This company specializes in commercial and industrial refrigeration, climate engineering, and energy performance optimization for installations across various sectors. | HVAC and Refrigeration Equipment Manufacturing | 🇫🇷 Carquefou | 1,106 | 1963 |
| 10 | [TIBCO](https://www.tamtam.ai/c/tibco-beaupreau-en-mauges) (tibco.fr)<br>Provides IT solutions, including digital workplace, cloud, cybersecurity, data, and AI, focusing on technological performance, data sovereignty, and environmental responsibility, with strong local presence. | IT Services and IT Consulting | 🇫🇷 Saint-Aignan-de-Grand-Lieu | 1,069 | 1985 |
| 11 | [SQUAD - Cabinet de conseils et dexpertises](https://www.tamtam.ai/c/squad-cabinet-de-conseils-et-dexpertises) (squadgroup.com)<br>Offers cybersecurity consulting and expert services, adapting to evolving IT practices like cloud computing and DevOps for major companies. | IT Services and IT Consulting | 🇫🇷 Paris | 803 | 2011 |
| 12 | [Catamania](https://www.tamtam.ai/c/catamania) (catamania.com)<br>Provides digital transformation services, consulting, software publishing, and information system architecture for banking, insurance, and retail sectors across international agencies using diverse technical expertise. | IT Services and IT Consulting | 🇫🇷 Saint-Herblain | 797 | 1999 |
| 13 | [Sce Aménagement & Environnement](https://www.tamtam.ai/c/sce-amenagement-and-environnement) (sce.fr)<br>Sustainable development firm offering urban planning, civil engineering, and environmental services globally with 45+ years of experience and 500 professionals | Environmental Services | 🇫🇷 Nantes | 625 | 1982 |
| 14 | [Bessé](https://www.tamtam.ai/c/besse) (besse.fr)<br>An independent insurance brokerage company with over 60 years of experience, specializing in protecting businesses and employees with innovative solutions and quality services | Insurance | 🇫🇷 Nantes | 610 | 1960 |
| 15 | [ASI ®](https://www.tamtam.ai/c/asi) (asi.fr)<br>Working towards a responsible digital world dedicated to serving humanity | IT Services and IT Consulting | 🇫🇷 Saint-Herblain | 590 | 1993 |
| 16 | [Conserto](https://www.tamtam.ai/c/conserto) (conserto.pro)<br>Offers IT consulting and expertise services across cloud, digital, and embedded domains through consulting, delivery centers, and labs models. | IT Services and IT Consulting | 🇫🇷 Saint-Herblain | 555 | 2013 |
| 17 | [Abalone France](https://www.tamtam.ai/c/abalone-france) (abalone-interim.com)<br>Specialized in HR services, temporary work, recruitment, and training since 1991, this company focuses on satisfying client needs and increasing employee employability | Human Resources Services | 🇫🇷 Saint-Herblain | 549 | 1991 |
| 18 | [IMATECH](https://www.tamtam.ai/c/imatech) (ima.eu)<br>Development and integration of advanced technology solutions, software services, and digital transformation support for various industries and businesses. | Information Services | 🇫🇷 Nantes | 534 | 1999 |
| 19 | [DeCA Propreté](https://www.tamtam.ai/c/deca-proprete) (deca-proprete.fr)<br>Provides tailored cleaning and maintenance services to professional clients, ensuring high-quality results with advanced techniques and equipment. | Environmental Services | 🇫🇷 Treillières | 501 | 1996 |
| 20 | [FÉTIS Group](https://www.tamtam.ai/c/fetis-group) (fetis.group)<br>Provides engineering products and services for off-road machinery, specialized vehicles, power generation, marine power, and manufacturing industries with focus on decarbonization. | Engineering Services | 🇫🇷 Nantes | 501 | 1978 |
| 21 | [SERBA](https://www.tamtam.ai/c/serba) (novam-ingenierie.com)<br>Specializing in structural concrete design for buildings and infrastructure, offering 40 years of experience in all stages from conception to execution, including BIM management and diagnostics | Construction | 🇫🇷 Challans | 497 | 1981 |
| 22 | [4CAD Group](https://www.tamtam.ai/c/4cad-group) (4cadgroup.com)<br>The company offers PLM, ERP, and IoT tools to help organizations optimize their information systems for increased industrial efficiency | Software Development | 🇫🇷 Bouguenais | 463 | 2004 |
| 23 | [Edeis](https://www.tamtam.ai/c/edeis) (edeis.com)<br>Specializing in engineering, operation, and construction solutions for the future, this company aims to become a leader in construction services and technical management | Engineering Services | 🇫🇷 Nantes | 412 | 2016 |
| 24 | [Cerfrance Mayenne-Sarthe](https://www.tamtam.ai/c/cerfrance-mayenne-sarthe) (cerfrance.fr)<br>A consulting and accounting firm providing comprehensive services to various business sectors, focusing on innovation and future preparation for entrepreneurs | Business Consulting and Services | 🇫🇷 Laval | 406 | 1958 |
| 25 | [ADX Groupe](https://www.tamtam.ai/c/adx-groupe) (adx-groupe.com)<br>Specializes in mandatory real estate diagnostics, asbestos detection, environmental analysis, BIM services, and asbestos risk training for various properties and infrastructures. | Construction | 🇫🇷 Château-Gontier | 406 | 2002 |
| 26 | [Atlantic Ingénierie](https://www.tamtam.ai/c/atlantic-ingenierie) (atlantic-ingenierie.com)<br>Engineering firm specializing in energy and telecommunication network deployment, providing expert studies and support for projects of all sizes. | Business Consulting and Services | 🇫🇷 Saint-Herblain | 385 | 2001 |
| 27 | [In Extenso Centre Ouest](https://www.tamtam.ai/c/in-extenso-centre-ouest) (inextenso.fr)<br>A leading firm in accounting and professional services for small and medium-sized businesses in western France, offering comprehensive services at every stage of business growth | Accounting | 🇫🇷 Cholet | 366 | 1991 |
| 28 | [ADECIA](https://www.tamtam.ai/c/adecia) (adecia.fr)<br>ADECIA consultancy group supports leaders and businesses of all sizes and sectors in activities development with 450 experts in accounting, law, IT, project management | Business Consulting and Services | 🇫🇷 La Roche-sur-Yon | 328 | 1956 |
| 29 | [ALTEREA](https://www.tamtam.ai/c/alterea) (alterea.fr)<br>An all-trade and energy engineering company specializing in renovation, construction, and energy optimization projects across various sectors for over 10 years | Construction | 🇫🇷 Nantes | 318 | 2004 |
| 30 | [AIS](https://www.tamtam.ai/c/ais) (groupeais.fr)<br>AIS is a human-centric company providing expertise to clients since 1985, focusing on professional growth and fulfillment of its employees | IT Services and IT Consulting | 🇫🇷 Saint-Herblain | 289 | 1985 |
| 31 | [Ergos](https://www.tamtam.ai/c/ergos-laval) (ergos-insertion.fr)<br>The company operates a network of temporary work agencies focused on social inclusion, fighting workplace discrimination, with a goal of nationwide coverage | Staffing and Recruiting | 🇫🇷 Laval | 276 | 1997 |
| 32 | [Cerfrance Vendée](https://www.tamtam.ai/c/cerfrance-vendee) (vendee.cerfrance.fr)<br>Provides accounting and consulting services to small and medium businesses, handling administrative and legal obligations to support growth. | Accounting | 🇫🇷 La Roche-sur-Yon | 270 | 1959 |
| 33 | [Altonéo](https://www.tamtam.ai/c/altoneo) (altoneo.com)<br>Altonéo provides services to support business leaders in optimizing overall company performance through personal strategy, management tools, employee support, and employer obligations | Accounting | 🇫🇷 Angers | 233 | 2014 |
| 34 | [SOFRESID ENGINEERING](https://www.tamtam.ai/c/sofresid-engineering) (sofresid-engineering.com)<br>Global engineering company with high value-added services in oil, gas, shipbuilding, steel, and construction industries. Offers turnkey projects, studies, procurement, and supervision. | Engineering Services | 🇫🇷 Saint-Herblain | 230 | 1958 |
| 35 | [Younup](https://www.tamtam.ai/c/younup) (younup.fr)<br>This company offers IT services, supporting clients throughout the software lifecycle from requirements to production, focusing on web, DevOps, data, AI, agility, mobile, and cloud. | IT Services and IT Consulting | 🇫🇷 Nantes | 224 | 2019 |
| 36 | [ORATIO Avocats](https://www.tamtam.ai/c/oratio-avocats) (oratio-avocats.com)<br>Provides durable legal support and business law services for executives and companies through a large network of French offices and international partnerships. | Law Practice | 🇫🇷 Angers | 224 | 1970 |
| 37 | [Slash Intérim](https://www.tamtam.ai/c/slash-interim)<br>Slash Intérim is a national network of temporary recruitment agents, aiming to blend human touch with digital innovation and empower independent recruitment professionals | Human Resources Services | 🇫🇷 Nantes | 203 | 2021 |
| 38 | [COCERTO](https://www.tamtam.ai/c/cocerto) (cocerto.fr)<br>Provides comprehensive accounting, audit, payroll, legal support, and digital tools to optimize and secure business operations with personalized service. | Accounting | 🇫🇷 Nantes | 200 | 1971 |
| 39 | [Becouze](https://www.tamtam.ai/c/becouze) (becouze-talents.com)<br>An independent audit, expertise, and consulting company, part of the global Crowe network, providing tailored solutions to support organizations internationally | Financial Services | 🇫🇷 Angers | 198 | 1982 |
| 40 | [Cerfrance Maine-et-Loire](https://www.tamtam.ai/c/cerfrance-maine-et-loire) (maine-et-loire.cerfrance.fr)<br>Accounting and consulting firm with 12 local offices, supporting entrepreneurs to improve business performance through various specialized services offered by 250 experts | Accounting | 🇫🇷 Angers | 195 | 1976 |
| 41 | [MECA](https://www.tamtam.ai/c/meca-nantes) (cluster-meca.fr)<br>A cluster of companies offering mechanical analysis expertise to ensure safety and feasibility of constructions through material behavior, design, and stress calculation | Business Consulting and Services | 🇫🇷 Nantes | 194 | 2006 |
| 42 | [GROUPE SYD](https://www.tamtam.ai/c/groupe-syd) (syd.fr)<br>Specializing in digital transformation, the company offers consultancy, project management, infrastructure services, Microsoft solutions integration, application development, and Microsoft expertise, emphasizing customer satisfaction and trust | IT Services and IT Consulting | 🇫🇷 Saint-Herblain | 190 | 1999 |
| 43 | [Compas](https://www.tamtam.ai/c/compas) (lecompas.fr)<br>Specializing in social observation of territories, creating observatories, conducting studies, and providing training for local governments to address social realities effectively | Research Services | 🇫🇷 Nantes | 182 | 1996 |
| 44 | [Cerfrance Loire-Atlantique](https://www.tamtam.ai/c/cerfrance-loire-atlantique) (loire-atlantique.cerfrance.fr)<br>Provide accounting, strategic, fiscal, legal, social, HR, and IT consulting to support local entrepreneurs and business leaders' overall performance. | Business Consulting and Services | 🇫🇷 La Chapelle-sur-Erdre | 177 | 1958 |
| 45 | [AdaCore](https://www.tamtam.ai/c/adacore) (adacore.com)<br>Providing commercial software solutions for Ada programming, ensuring safety, security, and reliability in large, long-lived applications, especially in aerospace and defense. | Software Development | 🇫🇷 Paris | 173 | 1994 |
| 46 | [SAPRENA](https://www.tamtam.ai/c/saprena) (saprena.com)<br>Creation of sustainable jobs for people with invisible disabilities in sectors like cleaning, landscaping, logistics, industrial maintenance, catering, and packaging. | Business Consulting and Services | 🇫🇷 Bouaye | 169 | 1987 |
| 47 | [ComptaCom](https://www.tamtam.ai/c/comptacom) (tyls.com)<br>Providing tailored advisory, accounting, legal, social, training, and wealth management services to entrepreneurs and business leaders for project success. | Accounting | 🇫🇷 Laval | 169 | 1988 |
| 48 | [ORINOX](https://www.tamtam.ai/c/orinox) (orinox.com)<br>Software consulting and plant design firm specializing in digitalization using AVEVA software suite for engineering, asset data visualization, resources management, simulation, and training | Business Consulting and Services | 🇫🇷 Chateaubriant | 166 | 2008 |
| 49 | [SOREX](https://www.tamtam.ai/c/sorex) (sorex.pro)<br>Specialized multidisciplinary firm offering financial, legal, social, and strategic expertise with personalized services for professional and personal life stages | Accounting | 🇫🇷 Angers | 165 | 1963 |
| 50 | [VFLIT - Vous faciliter l'IT](https://www.tamtam.ai/c/vflit-vous-faciliter-l-it) (vousfaciliter-it.fr)<br>Providing integrated cybersecurity, cloud, telecom, management applications, and safety services to enhance organizational IT and communication system performance. | Retail Office Equipment | 🇫🇷 Saint-Sébastien-sur-Loire | 164 | 2000 |
| 51 | [OFFICE NOTARIAL DU RALLIEMENT - NOTAIRES](https://www.tamtam.ai/c/office-notarial-du-ralliement-notaires) (ralliement.notaires.fr)<br>The notaries at this office provide legal services in family law, real estate, business law, rural law, and private international law | Legal Services | 🇫🇷 Angers | 162 | 1810 |
| 52 | [MOCA](https://www.tamtam.ai/c/moca) (asi.fr)<br>MOCA by ASI specializes in offering technical expertise and support for Microsoft solutions to users within the Microsoft ecosystem | IT Services and IT Consulting | 🇫🇷 Saint-Herblain | 159 | 2022 |
| 53 | [Capaciti](https://www.tamtam.ai/c/capaciti) (capaciti.com)<br>A regional leader in cybersecurity, providing specialized services in consulting, engineering, and system infrastructure support with offices in France and international project capabilities | IT Services and IT Consulting | 🇫🇷 Carquefou | 150 | 1999 |
| 54 | [Synergis Environnement](https://www.tamtam.ai/c/synergis-environnement) (synergis-environnement.com)<br>Independent firm specializes environmental, agricultural, regulatory engineering. Teams support public, private project owners securing projects against evolving regulatory requirements. | Environmental Services | 🇫🇷 Beaucouzé | 138 | 2020 |
| 55 | [Groupe ADINFO](https://www.tamtam.ai/c/groupe-adinfo) (groupeadinfo.com)<br>A specialist in management solutions and IT systems, providing services such as accounting, payroll, BI, security, hosting, cloud, CRM, and websites for SMEs in western France | Software Development | 🇫🇷 La Roche-sur-Yon | 138 | 1985 |
| 56 | [Amarris Groupe](https://www.tamtam.ai/c/amarris-groupe) (amarris.fr)<br>Independent accounting firm offering comprehensive support to SMEs, from digital solutions to personalized services, including expertise in accounting, legal, payroll, and innovative financial solutions | Accounting | 🇫🇷 Saint-Herblain | 131 | 1999 |
| 57 | [kanoma](https://www.tamtam.ai/c/kanoma) (kanoma.fr)<br>Experts guide clients digital transformation, from design to production, focusing on agile projects, development, product design, and organizational change. | IT Services and IT Consulting | 🇫🇷 Nantes | 128 | 2018 |
| 58 | [TGS France Avocats](https://www.tamtam.ai/c/tgs-france-avocats) (tgs-avocats.fr)<br>Legal services in corporate law, taxation, labor law, and contracts focusing on development, transformation, innovation, and transmission through agile and collaborative methods. | Law Practice | 🇫🇷 Angers | 127 |  |
| 59 | [ASENSILE](https://www.tamtam.ai/c/asensile) (asensile.com)<br>ASENSILE provides personalized professional development services for individuals and businesses, helping them navigate career challenges and reach success with a human-centered approach 🚀💼 | Professional Training and Coaching | 🇫🇷 Nantes | 121 |  |
| 60 | [ESSCA Junior Conseil](https://www.tamtam.ai/c/essca-junior-conseil) (esscajuniorconseil.com)<br>Student-run consulting firm offering market research, business plans, communication strategies, and social climate studies for diverse French companies. | Business Consulting and Services | 🇫🇷 Angers | 118 | 1972 |
| 61 | [FIDUCIAIRE AUDIT CONSEIL - FIDACO](https://www.tamtam.ai/c/fiduciaire-audit-conseil-fidaco) (fidaco.com)<br>A company specializing in audit, accounting, and consulting services for medium to large enterprises, nonprofits, and public sector entities | Accounting | 🇫🇷 Angers | 116 | 1976 |
| 62 | [PAY&Co](https://www.tamtam.ai/c/pay-and-co) (pay-and-co.fr)<br>PAY&Co offers a secure platform for easy and independent payroll and HR management, saving time and increasing competitiveness in HR and social legislation | Human Resources Services | 🇫🇷 Le Mans | 113 | 2019 |
| 63 | [Mismo Informatique](https://www.tamtam.ai/c/mismo-informatique) (mismo.fr)<br>A comprehensive IT solutions provider offering infrastructure, hardware, software, and services to streamline operations for 3,000 businesses, with certifications and partnerships with industry leaders | IT Services and IT Consulting | 🇫🇷 La Chapelle-sur-Erdre | 113 | 1992 |
| 64 | [EXEIS Conseil](https://www.tamtam.ai/c/exeis-conseil) (exeisconseil.com)<br>Operational consulting firm supporting organizations in mastering transformations, addressing organizational, performance, and digitization challenges across multiple industries. | Business Consulting and Services | 🇫🇷 Nantes | 104 | 2009 |
| 65 | [✨Focsie - Focsie Centre✨](https://www.tamtam.ai/c/focsie-focsie-centre) (focsie.fr)<br>Social intercompany service provider with over 130 employees in 6 agencies across 23 departments, supporting 300+ client companies and 30,000 employees daily on various topics | Human Resources Services | 🇫🇷 Saint-Sylvain-d'Anjou | 102 | 2000 |
| 66 | [RMA - Ressources Mutuelles Assistance](https://www.tamtam.ai/c/rma-ressources-mutuelles-assistance) (ressources-mutuelles-assistance.fr)<br>A French mutual assistance company prioritizing human relationships by providing quality services based on ethics, solidarity, and proximity, with personalized assistance | Individual and Family Services | 🇫🇷 Vertou | 87 |  |
| 67 | [GUÉMAS](https://www.tamtam.ai/c/guemas) (guemas-associes.fr)<br>An insurance consultancy and brokerage firm based in Clisson, France, offering tailored insurance solutions for businesses, including international coverage and health management services | Insurance | 🇫🇷 Clisson | 87 | 1938 |
| 68 | [Simphonis](https://www.tamtam.ai/c/simphonis) (simphonis.com)<br>SIMPHONIS offers tailored digital solutions for businesses, specializing in commercial configuration, app development, engineering, and ERP/CRM integration for growth and performance | IT Services and IT Consulting | 🇫🇷 Beaucouzé | 85 | 2005 |
| 69 | [Iliane Informatique](https://www.tamtam.ai/c/iliane-informatique) (iliane.fr)<br>Providing comprehensive IT solutions for businesses of all sizes to effectively manage their information systems | IT Services and IT Consulting | 🇫🇷 Saint-Herblain | 83 | 1982 |
| 70 | [Mercuria](https://www.tamtam.ai/c/mercuria) (mercuria.fr)<br>Advises and supports businesses with SaaS, Cloud, or hosted solutions for accounting, financial, payroll, and HR management software, working with reliable publishers. | Software Development | 🇫🇷 La Chapelle-sur-Erdre | 82 | 1999 |
| 71 | [Accior Cabinet d'Expertise Comptable](https://www.tamtam.ai/c/accior-cabinet-d-expertise-comptable) (accior.fr)<br>Specializing in accounting, auditing, and consulting services in Western France, providing tailored solutions to businesses with a dedicated team | Accounting | 🇫🇷 Le Château-d'Olonne | 82 | 1984 |
| 72 | [CMB](https://www.tamtam.ai/c/cmb) (cmb-eco.fr)<br>Established in 1983, CMB specializes in construction consulting, estimation, and project management services to support clients throughout their building projects | Construction | 🇫🇷 Le Mans | 81 | 1983 |
| 73 | [ATYX](https://www.tamtam.ai/c/atyx) (atyx.fr)<br>Provider of high-quality technical solutions for global projects in energy, process industry, infrastructure, and urban development sectors Specializing in conventional and renewable energy | Engineering Services | 🇫🇷 Saint-Herblain | 80 | 2001 |
| 74 | [Proservia - ManpowerGroup](https://www.tamtam.ai/c/proservia-manpowergroup) (experisfrance.fr)<br>Specializes in digital transformation for businesses, providing technical skills and soft skills through integrated services and solutions across EMEA. | IT Services and IT Consulting | 🇫🇷 Carquefou | 77 |  |
| 75 | [AVENCIA Groupe](https://www.tamtam.ai/c/avencia-groupe) (avencia-eca.fr)<br>Advising and supporting businesses through creation, management, development, diversification, restructuring, and transmission with pragmatic, clear solutions for success. | Accounting | 🇫🇷 La Roche-sur-Yon | 75 |  |
| 76 | [VACOA](https://www.tamtam.ai/c/vacoa) (vacoa-conseil.com)<br>Specialized in mechanical engineering, focusing on product and process development, and project management across aeronautics, energy, defense, and biomedical sectors. | Business Consulting and Services | 🇫🇷 Puteaux | 73 | 2018 |
| 77 | [AEPE-Gingko](https://www.tamtam.ai/c/aepe-gingko) (aepe-gingko.fr)<br>Provides environmental and landscape consulting, specializing in sustainable development, biodiversity preservation, and impact studies for renewable energy and infrastructure projects. | Environmental Services | 🇫🇷 La Ménitré | 71 | 2005 |
| 78 | [Amarris Contact](https://www.tamtam.ai/c/amarris-contact) (amarris-contact.fr)<br>Expertise-comptable company offering digital solutions and personalized service for independent professionals and small to medium-sized business owners in multiple cities | Accounting | 🇫🇷 Saint-Herblain | 70 | 1999 |
| 79 | [ELEPHANT Technologies](https://www.tamtam.ai/c/elephant-technologies) (elephant-technologies.fr)<br>Offers expert human-centered tech consultancy, ensuring perfect alignment between client needs and employee skills across various IT domains from idea to production. | IT Services and IT Consulting | 🇫🇷 Nantes | 69 | 2017 |
| 80 | [ABASE](https://www.tamtam.ai/c/abase) (generation-net.org)<br>ABASE 20 is a digital services company providing a variety of digital solutions and services to clients | IT Services and IT Consulting | 🇫🇷 Nantes | 67 | 1993 |
| 81 | [Laboratoire Microsept](https://www.tamtam.ai/c/laboratoire-microsept) (laboratoire-microsept.fr)<br>Microbiological analyses under COFRAC accreditation, validation studies per ISO 16140-2, hygiene consulting, training, and certification support for food and environment products. | Biotechnology Research | 🇫🇷 Le Lion-d'Angers | 65 | 1994 |
| 82 | [Obeo](https://www.tamtam.ai/c/obeo) (obeosoft.com)<br>Provider of open modeling software solutions for industrial systems, IT applications, and digital transformation Offers Open Source technologies and custom modeling solutions | Software Development | 🇫🇷 Carquefou | 65 | 2005 |
| 83 | [ATÉMIS](https://www.tamtam.ai/c/atemis) (atemis.eu)<br>Providing secure and responsible IT infrastructure design, deployment, and management services tailored to specific organizational needs with local support. | IT Services and IT Consulting | 🇫🇷 La Chapelle-sur-Erdre | 61 | 1997 |
| 84 | [Cap-visio](https://www.tamtam.ai/c/cap-visio) (cap-visio.com)<br>assembly, installation, implementation of remote meeting and multi-site communication solutions for SMEs and large accounts in France | IT Services and IT Consulting | 🇫🇷 Nantes | 59 | 2008 |
| 85 | [Almeria Solutions Informatiques](https://www.tamtam.ai/c/almeria-solutions-informatiques) (almeria.fr)<br>Provides IT management, software, and infrastructure solutions for SMEs in Grand Ouest. Focuses on productivity, simplicity, security, and tailored offerings for clients. | IT Services and IT Consulting | 🇫🇷 Les Sorinières | 54 | 1985 |
| 86 | [Kadran - Groupe Geoliance](https://www.tamtam.ai/c/kadran-groupe-geoliance) (kadran-ingenierie.fr)<br>Specialists in Geomatics and Geographic Engineering Ensuring safety, serenity, and trust in projects through precise measurements, mapping, and automation for smart cities | Civil Engineering | 🇫🇷 Saint-Sébastien-sur-Loire | 53 | 2015 |
| 87 | [Groupe Havana](https://www.tamtam.ai/c/groupe-havana) (havana-it.com)<br>Provides IT consulting services focusing on data, cloud, and AI to accelerate clients' digital transformation with innovation and expertise. | IT Services and IT Consulting | 🇫🇷 Montbonnot-Saint-Martin | 53 | 2012 |
| 88 | [Groupe EVS](https://www.tamtam.ai/c/groupe-evs) (groupeevs.eu)<br>French leader in meat cutting services on client production sites. Provides agile, high-performing solutions for food industry needs, focusing on quality, reliability, food safety. | Food and Beverage Manufacturing | 🇫🇷 Verrières-en-Anjou | 52 | 1982 |
| 89 | [FIT Conseil](https://www.tamtam.ai/c/fit-conseil) (fit-conseil.fr)<br>FIT Conseil is a Geomatics Experts company specialized in topography, asset description, digital imaging, and land activities for development projects and asset management | Real Estate | 🇫🇷 Nantes | 52 | 1968 |
| 90 | [Mosica](https://www.tamtam.ai/c/mosica) (mosica.fr)<br>Specialized in IT strategy, architecture consulting, and tailored solutions, MOSICA helps companies transform their information systems in the digital era | IT Services and IT Consulting | 🇫🇷 Nantes | 51 | 2011 |
| 91 | [Cabinet Vilaine et Associés (CVA)](https://www.tamtam.ai/c/cabinet-vilaine-et-associes-cva) (cvaexperts.fr)<br>An accounting firm in Pays-de-la-Loire, offering services such as advisory, audit, payroll, and expertise for clients in various industries | Accounting | 🇫🇷 Saint-Herblain | 50 | 1971 |
| 92 | [ALTEXA](https://www.tamtam.ai/c/altexa) (altexa.fr)<br>A Sarthe-based accounting firm with 6 partners and 48 staff, offering expertise in accounting, management, and business development to various sectors in Pays-de-la-Loire | Accounting | 🇫🇷 Le Mans | 49 |  |
| 93 | [BAMEX Cabinet d'Expertise Comptable](https://www.tamtam.ai/c/bamex-cabinet-d-expertise-comptable) (bamex.fr)<br>Bamex is an accounting firm offering tailored solutions in accounting, business management, and taxation They prioritize meeting client needs efficiently and effectively | Accounting | 🇫🇷 La Roche-sur-Yon | 48 |  |
| 94 | [Akajoule](https://www.tamtam.ai/c/akajoule) (akajoule.com)<br>Specialized energy and environmental engineering consultancy providing services in energy efficiency, renewable energy, and energy planning for local authorities and industries for 12 years | Environmental Services | 🇫🇷 Saint-Nazaire | 46 | 2010 |
| 95 | [CDP49](https://www.tamtam.ai/c/cdp49) (cdp49.fr)<br>A cooperative in Angers, part of a national network, supports entrepreneurs in testing, developing, and managing their businesses within a shared structure | Business Consulting and Services | 🇫🇷 Angers | 46 | 2006 |
| 96 | [CETh Conception d'Equipements Thermique](https://www.tamtam.ai/c/ceth-conception-d-equipements-thermique) (ceth.eu)<br>A French company specializing in heat treatment services including pre and post welding, equipment supply, and training for various industries | Industrial Machinery Manufacturing | 🇫🇷 La Chapelle Achard | 45 |  |
| 97 | [Consept - Assembleur de Talents](https://www.tamtam.ai/c/consept-assembleur-de-talents) (consept.fr)<br>Support clients in industrial and IT engineering projects with expertise in digitalization, infrastructure, logistics, quality, and cloud services. | IT Services and IT Consulting | 🇫🇷 Orvault | 45 | 2002 |
| 98 | [E2CA - Expertise Comptable](https://www.tamtam.ai/c/e2ca-expertise-comptable) (e2ca-expertise.com)<br>This company provides comprehensive expertise in financial, tax, legal, IT, and management matters to support businesses throughout their lifecycle | Accounting | 🇫🇷 Ruaudin | 42 | 1997 |
| 99 | [Kolibri Consulting](https://www.tamtam.ai/c/kolibri-consulting) (kolibriconsulting.com)<br>Kolibri Consulting is a Recruitment Agency specialized in Accounting and Agro-Food industries, providing personalized support to candidates and clients throughout the hiring process | Staffing and Recruiting | 🇫🇷 Nantes | 42 | 2018 |
| 100 | [Efi-Sciences](https://www.tamtam.ai/c/efi-sciences) (efisciences.fr)<br>Efi-Sciences is a team of 30 experienced professionals dedicated to helping manage businesses efficiently, offering personalized tools and a warm approach to accounting | Accounting | 🇫🇷 Saint-Herblain | 42 | 2009 |

## 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 14, 2026.

## More company lists in Pays de la Loire

- [The largest companies in Pays de la Loire](https://www.tamtam.ai/l/largest-companies-pays-de-la-loire) (4,263)
- [Manufacturers in Pays de la Loire](https://www.tamtam.ai/l/manufacturers-pays-de-la-loire) (484)
- [Companies with in-house R&D in Pays de la Loire](https://www.tamtam.ai/l/r-and-d-companies-pays-de-la-loire) (480)
- [Retail chains in Pays de la Loire](https://www.tamtam.ai/l/retail-chains-pays-de-la-loire) (450)
- [Multinational companies in Pays de la Loire](https://www.tamtam.ai/l/multinational-companies-pays-de-la-loire) (390)
- [Family-owned companies in Pays de la Loire](https://www.tamtam.ai/l/family-owned-companies-pays-de-la-loire) (255)
- [Hardware manufacturers in Pays de la Loire](https://www.tamtam.ai/l/hardware-companies-pays-de-la-loire) (251)
- [Contract manufacturers in Pays de la Loire](https://www.tamtam.ai/l/contract-manufacturers-pays-de-la-loire) (217)
- [IT services companies in Pays de la Loire](https://www.tamtam.ai/l/it-services-companies-pays-de-la-loire) (205)
- [Software Development companies in Pays de la Loire](https://www.tamtam.ai/l/software-development-companies-pays-de-la-loire) (198)
- [Distributors and wholesalers in Pays de la Loire](https://www.tamtam.ai/l/distributors-and-wholesalers-pays-de-la-loire) (198)
- [Public sector organisations in Pays de la Loire](https://www.tamtam.ai/l/public-sector-organisations-pays-de-la-loire) (185)
- [SaaS companies in Pays de la Loire](https://www.tamtam.ai/l/saas-companies-pays-de-la-loire) (180)
- [IT Services and IT Consulting companies in Pays de la Loire](https://www.tamtam.ai/l/it-services-and-it-consulting-companies-pays-de-la-loire) (167)
- [Consulting firms in Pays de la Loire](https://www.tamtam.ai/l/consulting-firms-pays-de-la-loire) (160)
- [Food and Beverage Manufacturing companies in Pays de la Loire](https://www.tamtam.ai/l/food-and-beverage-manufacturing-companies-pays-de-la-loire) (147)
- [Retail companies in Pays de la Loire](https://www.tamtam.ai/l/retail-companies-pays-de-la-loire) (144)
- [Education providers in Pays de la Loire](https://www.tamtam.ai/l/education-companies-pays-de-la-loire) (143)
- [Construction companies in Pays de la Loire](https://www.tamtam.ai/l/construction-companies-pays-de-la-loire) (141)
- [Industrial Machinery Manufacturing companies in Pays de la Loire](https://www.tamtam.ai/l/industrial-machinery-manufacturing-companies-pays-de-la-loire) (135)
- [Business Consulting and Services companies in Pays de la Loire](https://www.tamtam.ai/l/business-consulting-and-services-companies-pays-de-la-loire) (130)
- [Critical infrastructure operators in Pays de la Loire](https://www.tamtam.ai/l/critical-infrastructure-operators-pays-de-la-loire) (126)
- [Healthcare providers in Pays de la Loire](https://www.tamtam.ai/l/healthcare-providers-pays-de-la-loire) (118)
- [Financial services firms in Pays de la Loire](https://www.tamtam.ai/l/financial-services-firms-pays-de-la-loire) (113)

## The same list elsewhere in France

- [Professional services firms in France](https://www.tamtam.ai/l/professional-services-firms-france) (6,608)
- [Professional services firms in Île-de-France](https://www.tamtam.ai/l/professional-services-firms-ile-de-france) (3,375)
- [Professional services firms in Auvergne-Rhône-Alpes](https://www.tamtam.ai/l/professional-services-firms-auvergne-rhone-alpes) (710)
- [Professional services firms in the Hauts-de-Seine department](https://www.tamtam.ai/l/professional-services-firms-hauts-de-seine) (629)
- [Professional services firms in Provence-Alpes-Côte d'Azur](https://www.tamtam.ai/l/professional-services-firms-provence-alpes-cote-dazur) (433)
- [Professional services firms in Occitanie](https://www.tamtam.ai/l/professional-services-firms-occitanie) (399)
- [Professional services firms in the Rhône department](https://www.tamtam.ai/l/professional-services-firms-rhone) (398)
- [Professional services firms in Grand Est](https://www.tamtam.ai/l/professional-services-firms-grand-est) (318)
- [Professional services firms in Nouvelle-Aquitaine](https://www.tamtam.ai/l/professional-services-firms-nouvelle-aquitaine) (308)
- [Professional services firms in Hauts-de-France](https://www.tamtam.ai/l/professional-services-firms-hauts-de-france) (260)
- [Professional services firms in the Bouches-du-Rhône department](https://www.tamtam.ai/l/professional-services-firms-bouches-du-rhone) (249)
- [Professional services firms in the Haute-Garonne department](https://www.tamtam.ai/l/professional-services-firms-haute-garonne) (208)
- [Professional services firms in the Nord department](https://www.tamtam.ai/l/professional-services-firms-nord) (178)
- [Professional services firms in Brittany](https://www.tamtam.ai/l/professional-services-firms-brittany) (167)
- [Professional services firms in the Loire-Atlantique department](https://www.tamtam.ai/l/professional-services-firms-loire-atlantique) (158)
- [Professional services firms in the Gironde department](https://www.tamtam.ai/l/professional-services-firms-gironde) (151)
- [Professional services firms in Normandy](https://www.tamtam.ai/l/professional-services-firms-normandy) (114)
- [Professional services firms in the Yvelines department](https://www.tamtam.ai/l/professional-services-firms-yvelines) (108)
- [Professional services firms in the Ille-et-Vilaine department](https://www.tamtam.ai/l/professional-services-firms-ille-et-vilaine) (94)
- [Professional services firms in Paris](https://www.tamtam.ai/l/professional-services-firms-paris) (2,240)
- [Professional services firms in Lyon](https://www.tamtam.ai/l/professional-services-firms-lyon) (264)
- [Professional services firms in Toulouse](https://www.tamtam.ai/l/professional-services-firms-toulouse) (139)
- [Professional services firms in Marseille](https://www.tamtam.ai/l/professional-services-firms-marseille) (123)
- [Professional services firms in Boulogne-Billancourt](https://www.tamtam.ai/l/professional-services-firms-boulogne-billancourt) (102)

## The same list elsewhere

- [Professional services firms in the world](https://www.tamtam.ai/l/professional-services-firms-in-the-world) (24,736)
- [Professional services firms in Europe](https://www.tamtam.ai/l/professional-services-firms-in-europe) (13,697)

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Source: https://www.tamtam.ai/l/professional-services-firms-pays-de-la-loire