# List of consulting firms in Europe

Tamtam tracks 8,900 consulting firms headquartered in Europe. This list ranks the 100 largest by number of employees on LinkedIn, led by Accenture, EY and Capgemini. Their median headcount is 14,116. Half of them were founded in 1986 or later. The most common headquarters are London (18), Paris (9) and Madrid (4).

This selection of large European consulting firms includes global leaders in business consulting, IT services, and professional services. Companies like Accenture and EY offer extensive digital transformation and strategic advice, while Capgemini and FUJITSU specialize in IT services and solutions. The list also features major players in financial services such as Allianz Services and WTW, alongside specialized firms like DEKRA in public safety and Atento in outsourcing.

The firms demonstrate a strong presence across various European cities, with multiple headquarters in London, Paris, and Madrid. Many of these companies, including KPMG Italy and Atos, provide a comprehensive suite of services ranging from audit and advisory to cybersecurity and cloud solutions, serving both governments and multinational corporations.

🌍 Europe · 100 companies · Updated Nov 13, 2026

| # | Company | Industry | Headquarters | Employees | Founded |
|---|---|---|---|---|---|
| 1 | [Accenture](https://www.tamtam.ai/c/accenture) (accenture.com)<br>It provides professional services to businesses and governments, focusing on digital transformation, operational optimization, and enhancing citizen services globally. | Business Consulting and Services | 🇮🇪 Dublin | 687,682 |  |
| 2 | [EY](https://www.tamtam.ai/c/ey) (ey.com)<br>A global organization with diverse teams in over 150 countries provides assurance, consulting, law, strategy, tax, and transactions to help clients grow and transform | Professional Services | 🇬🇧 London | 404,207 |  |
| 3 | [Capgemini](https://www.tamtam.ai/c/capgemini-paris) (capgemini.com)<br>Imagine future organizations, making it real with AI, technology, and people, delivering end-to-end services and solutions across strategy, technology, design, engineering and business operations | IT Services and IT Consulting | 🇫🇷 Paris | 342,989 |  |
| 4 | [KPMG Italy](https://www.tamtam.ai/c/kpmg-italy) (kpmg.com)<br>A global professional services network providing audit, advisory, tax, and legal services to businesses worldwide, focusing on building trust and driving change | Business Consulting and Services | 🇮🇹 Milan | 265,000 | 1987 |
| 5 | [Allianz Services](https://www.tamtam.ai/c/allianz-services) (careers.allianz.com)<br>Provides specialized core insurance operations, shared services, business analytics, engineering, and management consulting to drive client experience within a global insurance group. | Financial Services | 🇩🇪 Munich | 159,000 |  |
| 6 | [Atento](https://www.tamtam.ai/c/atento) (atento.com)<br>Leading provider of CRM and BPO services in Latin America and globally, serving multinational corporations in various industries through multiple channels | Outsourcing and Offshoring Consulting | 🇪🇸 Madrid | 154,000 | 1999 |
| 7 | [FUJITSU](https://www.tamtam.ai/c/fujitsu) (global.fujitsu)<br>Leading global information and communication technology company, offering technology products, solutions, and services, connecting people, technology, and ideas for a sustainable world. | IT Services and IT Consulting | 🇬🇧 | 124,000 | 1935 |
| 8 | [Atos](https://www.tamtam.ai/c/atos) (atos.net)<br>Provides tailored AI-powered, end-to-end solutions for all industries, specializing in cybersecurity, cloud, and high-performance computing, fostering a secure, decarbonized future. | IT Services and IT Consulting | 🇫🇷 95877 Bezons | 85,294 |  |
| 9 | [WTW](https://www.tamtam.ai/c/wtw) (wtwco.com)<br>Offering data-driven solutions in people, risk, and capital areas, leveraging global expertise to enhance strategy, resilience, workforce motivation, and performance | Financial Services | 🇬🇧 London | 55,656 |  |
| 10 | [Almaviva Group](https://www.tamtam.ai/c/almaviva-group) (almavivagroup.com)<br>Provides digital innovation and ICT solutions globally, supporting business model transformation and competitiveness across public and private sectors. | IT Services and IT Consulting | 🇮🇹 Rome | 52,112 | 2005 |
| 11 | [BDO](https://www.tamtam.ai/c/bdo-brussels) (bdo.global)<br>Providing professional services globally with 1800 offices, focusing on quality, technology, and innovative solutions for long-term client value. | Accounting | 🇧🇪 Brussels | 51,974 |  |
| 12 | [DEKRA](https://www.tamtam.ai/c/dekra) (dekra.com)<br>DEKRA provides expert safety services worldwide, including vehicle inspection, claims services, industrial inspections, training, product certification, and sustainable solutions | Public Safety | 🇩🇪 Stuttgart | 49,000 |  |
| 13 | [Sopra Steria](https://www.tamtam.ai/c/sopra-steria) (soprasteria.com)<br>Offers consulting, digital services, and solutions, assisting large companies and organizations with digital transformation, improving competitiveness through technology and collaboration. | IT Services and IT Consulting | 🇫🇷 Paris | 47,609 |  |
| 14 | [Minsait](https://www.tamtam.ai/c/minsait) (minsait.com)<br>A leading Spanish technological consultant operating globally, leveraging cloud, security, payments, and innovative technology to drive business and societal impact #MoreMinsait | IT Services and IT Consulting | 🇪🇸 Alcobendas | 45,000 | 2016 |
| 15 | [Capgemini Engineering](https://www.tamtam.ai/c/capgemini-engineering) (capgemini.com)<br>Engineering R&D services, combining broad industry knowledge and cutting-edge digital and software technologies to accelerate clients' journey towards Intelligent Industry. | Engineering Services | 🇫🇷 Paris | 44,836 |  |
| 16 | [Arcadis](https://www.tamtam.ai/c/arcadis) (arcadis.com)<br>delivering transformative projects globally addressing climate, energy, and livable cities through design, engineering, architecture, and consulting for a better future | Professional Services | 🇳🇱 Amsterdam | 42,295 |  |
| 17 | [Mazars](https://www.tamtam.ai/c/mazars-paris-la-defense) (forvismazars.com)<br>Global integrated partnership providing audit, accountancy, advisory, tax, and legal services through fifty thousand professionals across more than one hundred countries worldwide. | Accounting | 🇫🇷 Paris La Defense | 42,000 | 1945 |
| 18 | [Publicis Groupe](https://www.tamtam.ai/c/publicis-groupe) (publicisgroupe.com)<br>Helps clients transform their marketing and digital businesses, providing expertise in communications, media, data, and technology across 100+ countries. | Advertising Services | 🇫🇷 Paris | 41,020 |  |
| 19 | [ALTEN](https://www.tamtam.ai/c/alten) (alten.com)<br>Provides engineering and IT services, supporting businesses in technological and sustainable transformation across various industries with high-level consultant-engineers. | Engineering Services | 🇫🇷 Boulogne-Billancourt | 38,710 | 1988 |
| 20 | [ICON plc](https://www.tamtam.ai/c/icon-plc) (iconplc.com)<br>A global company founded in Ireland in 1990, specializing in accelerating the development of drugs and devices to save lives and improve quality of life | Biotechnology Research | 🇮🇪 Dublin | 35,001 |  |
| 21 | [Serco](https://www.tamtam.ai/c/serco-hook) (serco.com)<br>Innovative solutions for global challenges in justice, migration, defense, space, health, and transport through service design, program management, and systems integration | IT Services and IT Consulting | 🇬🇧 Hook | 32,618 |  |
| 22 | [NTT DATA Europe & Latam](https://www.tamtam.ai/c/ntt-data-europe-and-latam) (nttdata.com)<br>Global IT services provider transforming clients through consulting, solutions, and managed services to enable a confident move into the digital future | IT Services and IT Consulting | 🇪🇸 Madrid | 31,932 |  |
| 23 | [B. Braun Group](https://www.tamtam.ai/c/b-braun-group) (bbraun.com)<br>A leading medical technology organization dedicated to protecting and improving global health through innovative solutions and collaborative culture | Medical Equipment Manufacturing | 🇩🇪 Melsungen | 29,535 | 1839 |
| 24 | [Webhelp](https://www.tamtam.ai/c/webhelp) (webhelp.com)<br>The company specializes in creating innovative customer journeys using data insights, AI, and human talent to drive growth for brands worldwide | Outsourcing and Offshoring Consulting | 🇫🇷 Paris | 27,162 |  |
| 25 | [Deutsche Gesellschaft für Internationale Zusammenarbeit (GIZ) GmbH](https://www.tamtam.ai/c/deutsche-gesellschaft-fur-internationale-zusammenarbeit-giz-gmbh) (giz.de)<br>Provides international cooperation for sustainable development and education, helping shape a future worth living worldwide, with over 50 years of experience. | International Trade and Development | 🇩🇪 Bonn | 26,333 |  |
| 26 | [Arup](https://www.tamtam.ai/c/arup) (arup.com)<br>A global collective of designers and consultants dedicated to sustainable development, collaborating with clients to shape a better world using technology and imagination | Design Services | 🇬🇧 London | 26,193 | 1946 |
| 27 | [Kantar](https://www.tamtam.ai/c/kantar) (kantar.com)<br>Global leader in marketing data and analytics with deep expertise, innovative technology, and insights to help clients understand people and drive growth worldwide | Market Research | 🇬🇧 London | 24,976 |  |
| 28 | [Mott MacDonald](https://www.tamtam.ai/c/mott-macdonald) (mottmac.com)<br>The company focuses on improving society through digital innovation, excellence, and solving intricate challenges with clients to deliver better outcomes | Civil Engineering | 🇬🇧 London | 24,653 | 1989 |
| 29 | [Sweco](https://www.tamtam.ai/c/sweco) (swecogroup.com)<br>A leading consultancy co-creating sustainable solutions for urban areas through planning, design, and digital innovation with a team of 21,000 specialists | Professional Services | 🇸🇪 Stockholm | 22,591 |  |
| 30 | [Nagarro](https://www.tamtam.ai/c/nagarro) (nagarro.com)<br>Innovative digital engineering company guiding clients to embrace human-centric, digital-first strategies for responsive, efficient, creative, and sustainable business growth | IT Services and IT Consulting | 🇩🇪 Munich | 22,553 |  |
| 31 | [Inetum](https://www.tamtam.ai/c/inetum) (inetum.com)<br>European digital services leader helping businesses, public sector, and society with digital impact, performance, and innovation, partnering with major software publishers. | IT Services and IT Consulting | 🇫🇷 Saint-Ouen | 21,788 | 1970 |
| 32 | [Majorel](https://www.tamtam.ai/c/majorel) (fr.linkedin.com)<br>Providing advanced, digitally-powered business services to help global brands streamline operations sustainably and deliver critical solutions worldwide. | Outsourcing and Offshoring Consulting | 🇱🇺 Luxembourg | 20,304 | 1978 |
| 33 | [AFRY](https://www.tamtam.ai/c/afry) (afry.com)<br>A European leader in engineering, design, and advisory services, accelerating the transition to a sustainable society through global expertise in infrastructure, industry, energy, and digitalization | Engineering Services | 🇸🇪 Stockholm | 19,737 |  |
| 34 | [The Adecco Group](https://www.tamtam.ai/c/the-adecco-group) (adeccogroup.com)<br>Global talent company providing employability, digital and engineering solutions, and workforce optimization across multiple industries and countries. | Human Resources Services | 🇨🇭 Zurich | 19,418 |  |
| 35 | [Ipsos](https://www.tamtam.ai/c/ipsos) (ipsos.com)<br>Ipsos provides accurate and relevant information to help clients make confident decisions, shaping precise measurement into actionable insights for success | Market Research | 🇫🇷 Paris | 19,037 | 1975 |
| 36 | [Technip Energies](https://www.tamtam.ai/c/technip-energies) (ten.com)<br>Leading energy engineering & technology company focused on LNG, hydrogen, ethylene, sustainable chemistry, and CO2 management Committed to accelerating the energy transition globally | Engineering Services | 🇫🇷 Paris | 18,645 |  |
| 37 | [EY-Parthenon](https://www.tamtam.ai/c/ey-parthenon) (ey.com)<br>Multidisciplinary professionals across 120 countries provide actionable corporate, transaction, and turnaround strategies to clients using data analytics and digital capabilities | Business Consulting and Services | 🇬🇧 London | 18,536 |  |
| 38 | [Ramboll](https://www.tamtam.ai/c/ramboll) (ramboll.com)<br>Global company offering sustainable solutions in architecture, engineering, and consultancy across various sectors to create sustainable cities and societies worldwide | Engineering Services | 🇩🇰 Copenhagen | 18,506 | 1945 |
| 39 | [IGT Solutions](https://www.tamtam.ai/c/igt-solutions) (igtsolutions.com)<br>Provides comprehensive customer experience and digital transformation services primarily to the travel and hospitality industry, including consulting, technology, and operations. | IT Services and IT Consulting | 🇫🇷 Gurugram | 18,212 | 1998 |
| 40 | [TÜV SÜD](https://www.tamtam.ai/c/tuv-sud) (tuvsud.com)<br>Experts provide testing, certification, auditing, and advisory services across various industries, ensuring safety, security, and sustainability for technological advancements and market access. | Public Safety | 🇩🇪 Munich | 18,205 | 1866 |
| 41 | [Reply](https://www.tamtam.ai/c/reply) (reply.com)<br>Specializing in innovative solutions using AI, big data, and digital media, this company delivers consulting and digital services across various sectors globally | IT Services and IT Consulting | 🇮🇹 Turin | 17,188 | 1996 |
| 42 | [Capgemini Invent](https://www.tamtam.ai/c/capgemini-invent) (capgemini.com)<br>Digital innovation, consulting, and transformation services combining strategy, technology, data science, and creative design to help businesses envision and build the future | Business Consulting and Services | 🇫🇷 Paris | 17,000 |  |
| 43 | [BCD Travel](https://www.tamtam.ai/c/bcd-travel) (bcdtravel.com)<br>Comprehensive corporate travel management with digital tools, meetings and events services, global consultancy, supporting cost savings and sustainability worldwide. | Travel Arrangements | 🇳🇱 Utrecht | 16,897 | 2006 |
| 44 | [Sendiri](https://www.tamtam.ai/c/sendiri) (sendiri.nl)<br>Learning and development consultancy specializing in online programs, community support, and guidance to empower individuals and organizations in enhancing skills and knowledge | Professional Training and Coaching | 🇳🇱 Eefde | 15,445 | 2018 |
| 45 | [Luxoft](https://www.tamtam.ai/c/luxoft) (luxoft.com)<br>A global digital strategy and software engineering firm, part of DXC Technology, offering bespoke technology solutions to drive business innovation worldwide | IT Services and IT Consulting | 🇨🇭 Zug | 15,420 |  |
| 46 | [Egis](https://www.tamtam.ai/c/egis) (egis-group.com)<br>An international consultancy specializing in sustainable infrastructure, construction engineering, and mobility services, working towards achieving carbon neutrality and social development globally | Civil Engineering | 🇫🇷 Saint-Quentin-en-Yvelines | 15,158 |  |
| 47 | [KPMG UK](https://www.tamtam.ai/c/kpmg-uk) (kpmg.com)<br>A leading UK provider of tax, audit, and advisory services with a global presence, focusing on innovative solutions and expertise for clients' needs | Business Consulting and Services | 🇬🇧 London | 15,102 | 1987 |
| 48 | [Petrofac](https://www.tamtam.ai/c/petrofac) (petrofac.com)<br>International energy service provider specializing in designing, building, managing, and maintaining oil, gas, refining, and renewable energy infrastructure for leading energy companies worldwide | Engineering Services | 🇬🇧 London | 14,616 | 1981 |
| 49 | [Cloud Consulting](https://www.tamtam.ai/c/cloud-consulting) (ccltng.com)<br>Oversees national education policies, youth programs, and administration to support learning and development across France. | IT Services and IT Consulting | 🇬🇧 London | 14,588 |  |
| 50 | [Expleo Group](https://www.tamtam.ai/c/expleo-group) (expleo.com)<br>Global provider partners with organisations to guide business transformation, achieve operational excellence, and future-proof businesses through engineering, technology, and consulting services. | IT Services and IT Consulting | 🇫🇷 Saint Quentin en Yvelines | 14,116 | 1966 |
| 51 | [Savills](https://www.tamtam.ai/c/savills) (savills.com)<br>Global real estate advisory firm providing tailored solutions and expert advice for residential and commercial property clients worldwide. | Real Estate | 🇬🇧 London | 13,891 |  |
| 52 | [GFT Technologies](https://www.tamtam.ai/c/gft-technologies) (gft.com)<br>Design advanced data, AI transformation solutions, modernize tech architectures, and develop next-gen core systems for industry leaders globally. | IT Services and IT Consulting | 🇩🇪 Stuttgart | 13,400 | 1987 |
| 53 | [NTT DATA Business Solutions](https://www.tamtam.ai/c/ntt-data-business-solutions) (nttdata-solutions.com)<br>A global consultancy firm specializing in driving innovation and improving SAP solutions for businesses to transform, grow, and succeed | IT Services and IT Consulting | 🇩🇪 Bielefeld | 12,858 | 1989 |
| 54 | [RSK Group](https://www.tamtam.ai/c/rsk-group) (rskgroup.com)<br>Global provider of environmental consultancy and engineering services, integrating innovation and multidisciplinary collaboration to address complex sustainability challenges. | Environmental Services | 🇬🇧 Helsby | 12,442 |  |
| 55 | [Tieto](https://www.tamtam.ai/c/tieto) (tieto.com)<br>Providing software and technology consulting services focused on creating lasting impact and delivering effective solutions for clients. | Technology, Information and Internet | 🇫🇮 | 12,353 | 1968 |
| 56 | [Grupo Tragsa](https://www.tamtam.ai/c/grupo-tragsa) (tragsa.es)<br>Provides engineering, technical assistance, and execution of projects for public administrations in agriculture, environment, and rural development sectors. | Environmental Services | 🇪🇸 Madrid | 12,239 | 1977 |
| 57 | [Bechtle Schweiz AG](https://www.tamtam.ai/c/bechtle-schweiz-ag) (bechtle.com)<br>Leading IT service provider for SMEs, large customers, and public institutions, offering consulting, infrastructure, cloud, services, and software solutions throughout the entire IT life cycle. | IT Services and IT Consulting | 🇨🇭 Mägenwil | 12,000 | 1983 |
| 58 | [Altran](https://www.tamtam.ai/c/altran) (capgemini-engineering.com)<br>Altran, now Capgemini Engineering, offers engineering services Follow them on LinkedIn for updates and insights | IT Services and IT Consulting | 🇫🇷 Neuilly-sur-Seine | 11,652 |  |
| 59 | [PwC Deutschland](https://www.tamtam.ai/c/pwc-deutschland) (pwc.de)<br>A leading auditing and consulting firm in Germany, offering services worldwide with expertise in assurance, tax, legal, deals, and strategy advisory | Business Consulting and Services | 🇩🇪 Frankfurt | 11,566 |  |
| 60 | [SEGULA Technologies](https://www.tamtam.ai/c/segula-technologies) (segulatechnologies.com)<br>Provides global engineering services across major industrial sectors, committed to innovation, from research to industrialization and production. | Engineering Services | 🇫🇷 Nanterre | 11,442 |  |
| 61 | [Ayesa](https://www.tamtam.ai/c/ayesa) (ayesa.com)<br>Global provider of technology and engineering services with expertise in digital solutions, infrastructure design, and supervision for private and public sectors worldwide | Business Consulting and Services | 🇪🇸 Seville | 11,405 | 1966 |
| 62 | [PwC UK](https://www.tamtam.ai/c/pwc-uk) (pwc.co.uk)<br>Professional services firm focusing on building trust in society and solving important problems through partnership and commercial expertise. | Accounting | 🇬🇧 London | 10,873 |  |
| 63 | [Social Group - socialgroup.ch](https://www.tamtam.ai/c/social-group-socialgroup-ch) (socialgroup.ch)<br>Optimizing digital business ecosystems, enhancing LinkedIn presence for sustainable growth, measurable success, and maximum efficiency in sales and recruiting. | Business Consulting and Services | 🇨🇭 Wallisellen | 10,803 | 2012 |
| 64 | [Sogeti](https://www.tamtam.ai/c/sogeti) (sogeti.com)<br>Helps organizations with technology solutions, implements innovation quickly, focuses on quality engineering, cloud, application development through AI, data, and automation. | IT Services and IT Consulting | 🇫🇷 Paris | 10,781 | 1967 |
| 65 | [T-Systems International](https://www.tamtam.ai/c/t-systems-international) (t-systems.com)<br>Provides end-to-end IT solutions, cloud migration, and industry-specific digital transformation services with strong security and global presence. | IT Services and IT Consulting | 🇩🇪 Frankfurt | 10,768 | 2000 |
| 66 | [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 |  |
| 67 | [SYSTRA](https://www.tamtam.ai/c/systra) (systra.com)<br>Leading engineering and consultancy group specializing in public transport and mobility solutions, connecting people and regions through transport infrastructure development. | Engineering Services | 🇫🇷 Paris | 10,162 |  |
| 68 | [BearingPoint](https://www.tamtam.ai/c/bearingpoint) (bearingpoint.com)<br>Independent consulting firm offering tailored solutions for complex business environments, applying deep industry expertise to help clients achieve their goals globally | Business Consulting and Services | 🇳🇱 Amsterdam | 10,074 | 2002 |
| 69 | [BSI](https://www.tamtam.ai/c/bsi-london) (bsigroup.com)<br>A global organization with over 100 years of experience in shaping best practices, helping businesses achieve excellence, competence, and sustainable growth | Professional Services | 🇬🇧 London | 9,882 | 1901 |
| 70 | [Mace](https://www.tamtam.ai/c/mace) (macegroup.com)<br>Delivery consultancy and construction expertise for iconic buildings, data centres, life science, social infrastructure, and regeneration projects worldwide. | Construction | 🇬🇧 London | 9,872 | 1990 |
| 71 | [KPMG Deutschland](https://www.tamtam.ai/c/kpmg-deutschland) (kpmg.com)<br>Providing audit, tax, consulting, and deal advisory services with interdisciplinary teams specializing in key industries across multiple locations. | Business Consulting and Services | 🇩🇪 Berlin | 9,823 |  |
| 72 | [Atkins](https://www.tamtam.ai/c/atkins) (atkinsrealis.com)<br>World-class engineering services and nuclear organization connecting people, data, and technology to transform global infrastructure and energy systems through design and management. | Engineering Services | 🇬🇧 Epsom | 9,798 |  |
| 73 | [Apave](https://www.tamtam.ai/c/apave) (apave.com)<br>Specializes in technical, human, environmental, and digital risk management, ensuring safety and performance across various economic sectors for over 150 years. | Environmental Services | 🇫🇷 Courbevoie | 9,778 | 1867 |
| 74 | [Endava](https://www.tamtam.ai/c/endava) (endava.com)<br>The company leverages technology and expertise to drive innovation and transform businesses with customized digital solutions across industries | IT Services and IT Consulting | 🇬🇧 London | 9,559 | 2020 |
| 75 | [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 |  |
| 76 | [Tietoevry](https://www.tamtam.ai/c/tietoevry) (tieto.com)<br>Creating purposeful technology to reinvent the world for good, focusing on the future of businesses, societies, and humanity | IT Services and IT Consulting | 🇫🇮 Helsinki | 9,343 |  |
| 77 | [AMS](https://www.tamtam.ai/c/ams) (weareams.com)<br>Global talent solutions business specializing in sourcing, selecting, and retaining top talent through digital innovation, HR expertise, and a holistic approach to workforce management | Human Resources Services | 🇬🇧 London | 8,718 | 1996 |
| 78 | [COWI](https://www.tamtam.ai/c/cowi) (cowi.com)<br>The company creates sustainable solutions with a focus on improving quality of life for present and future generations through engineering and architecture expertise | Civil Engineering | 🇩🇰 Lyngby | 8,647 | 1930 |
| 79 | [EDAG Group](https://www.tamtam.ai/c/edag-group) (edag.com)<br>Engineering service provider for mobility, defense, industry, and public solutions, developing complex products, systems, and production solutions with an interdisciplinary team. | Engineering Services | 🇩🇪 Wiesbaden | 8,500 | 1969 |
| 80 | [SEIDOR](https://www.tamtam.ai/c/seidor) (seidor.com)<br>Helps clients transform and compete through technology and innovation, focusing on human values, sustainability, and partnering with leading tech innovators globally. | IT Services and IT Consulting | 🇪🇸 Barcelona | 8,352 |  |
| 81 | [Netcompany](https://www.tamtam.ai/c/netcompany) (netcompany.com)<br>Providing agile IT consulting and digital transformation services, delivering scalable, modern technology solutions for large Northern European clients. | IT Services and IT Consulting | 🇩🇰 Copenhagen | 8,266 | 2000 |
| 82 | [RINA](https://www.tamtam.ai/c/rina) (rina.org)<br>Providing expert engineering, testing, inspection, and certification services across diverse markets with a focus on sustainable growth and client partnership. | Professional Services | 🇮🇹 Genoa | 8,259 |  |
| 83 | [IAV GmbH](https://www.tamtam.ai/c/iav-gmbh) (iav.com)<br>Development of sustainable, intelligent, and connected mobility solutions combining automotive engineering and IT expertise for various industries. | Engineering Services | 🇩🇪 Berlin | 8,200 | 1983 |
| 84 | [ILUNION](https://www.tamtam.ai/c/ilunion) (ilunion.com)<br>A group of companies focused on creating a more accessible world, reinventing themselves daily to compete and move forward | Business Consulting and Services | 🇪🇸 Madrid | 8,198 | 2014 |
| 85 | [Assystem](https://www.tamtam.ai/c/assystem) (assystem.com)<br>Independent nuclear engineering company accelerating energy transition, developing nuclear and renewable energies, power grids, hydrogen projects, and low-carbon transport. | Business Consulting and Services | 🇫🇷 Courbevoie | 8,143 |  |
| 86 | [Artelia](https://www.tamtam.ai/c/artelia) (arteliagroup.com)<br>consultancy, engineering, and project management group specializing in mobility, water, energy, building, and industry, offering comprehensive engineering solutions globally. | Civil Engineering | 🇫🇷 Saint-Ouen | 8,106 | 2010 |
| 87 | [Capco](https://www.tamtam.ai/c/capco) (capco.com)<br>Global technology and management consultancy specializing in digital transformation, data-driven solutions, and innovation for banking, payments, capital markets, insurance, and energy sectors. | Financial Services | 🇬🇧 London | 8,026 | 1998 |
| 88 | [BTS](https://www.tamtam.ai/c/bts) (bts.com)<br>Helps organizations move strategy to execution, empowering teams, aligning leadership, and scaling breakthroughs through hands-on, practical consulting and immersive business simulations. | Business Consulting and Services | 🇸🇪 Stockholm | 7,996 | 1986 |
| 89 | [PwC Italy](https://www.tamtam.ai/c/pwc-italy) (pwc.com)<br>PwC Italia is an organization part of the international PwC network, working with over 8,000 professionals in 24 Italian cities to create trust and solve important issues | Professional Services | 🇮🇹 Milan | 7,793 | 1849 |
| 90 | [Royal HaskoningDHV](https://www.tamtam.ai/c/royal-haskoningdhv) (haskoning.com)<br>Independent consulting engineering firm providing sustainable solutions addressing climate change, digital transformation, energy transition, and societal challenges worldwide. | Civil Engineering | 🇳🇱 Amersfoort | 7,740 | 1881 |
| 91 | [Akka Technologies](https://www.tamtam.ai/c/akka-technologies) (akkodis.com)<br>European leader in engineering consulting and R&D services, supporting clients with digital solutions and expertise across various sectors throughout product life cycles. | IT Services and IT Consulting | 🇧🇪 Brussels | 7,700 | 1984 |
| 92 | [Azets](https://www.tamtam.ai/c/azets) (azets.com)<br>A leading professional services firm in Northern Europe, providing advisory, accounting, audit, HR, recruitment, outsourcing, and technology solutions to clients | Accounting | 🇬🇧 London | 7,523 |  |
| 93 | [Amaris Consulting](https://www.tamtam.ai/c/amaris-consulting) (amaris.com)<br>Independent technology consulting firm providing guidance and solutions to businesses worldwide through a diverse team of experts in various industries Partner of Mantu | IT Services and IT Consulting | 🇨🇭 Geneva | 7,500 | 2007 |
| 94 | [SOCOTEC](https://www.tamtam.ai/c/socotec) (socotec.fr)<br>Provides services throughout the entire life cycle of built assets for compliance, extended lifespan, improved performance, and people’s safety in construction, infrastructure, and industry. | Environmental Services | 🇫🇷 Guyancourt | 7,326 | 1953 |
| 95 | [Accenture Italia](https://www.tamtam.ai/c/accenture-italia) (accenture.com)<br>Global professional services firm specializing in digital, cloud, security, strategy, consulting, technology, and operations across multiple industries worldwide. | IT Services and IT Consulting | 🇮🇹 Milan | 7,209 |  |
| 96 | [TRACTEBEL](https://www.tamtam.ai/c/tractebel) (tractebel-engie.com)<br>Provides integrated solutions for sustainable energy and built environment projects, offering expertise in nuclear, renewables, power, grids, infrastructure, and water resources. | Engineering Services | 🇧🇪 Brussels | 7,185 |  |
| 97 | [Wavestone](https://www.tamtam.ai/c/wavestone) (wavestone.com)<br>Provides consulting services combining technology and business expertise for strategic transformations and sustainable transitions for large companies. | Business Consulting and Services | 🇫🇷 100-101 Terrasse Boieldieu | 7,026 | 1990 |
| 98 | [Mantu](https://www.tamtam.ai/c/mantu) (mantu.com)<br>Global consulting firm offering leadership, technology, digital marketing, and talent management services to connect companies with leading teams and technology for sustainable success | Business Consulting and Services | 🇨🇭 Chêne-Bourg | 6,905 |  |
| 99 | [BDO UK](https://www.tamtam.ai/c/bdo-uk) (bdo.co.uk)<br>Provides tax, audit, assurance, accounting, business advisory, and outsourcing services to diverse sectors with a client-focused, innovative approach. | Accounting | 🇬🇧 London | 6,800 | 1903 |
| 100 | [BIP](https://www.tamtam.ai/c/bip-milano) (bip-group.com)<br>A diverse network of thinkers and creators offering tailored consultancy services, turning ideas into projects to drive market change and benefit customers | Business Consulting and Services | 🇮🇹 Milan | 6,757 |  |

## 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.

## More company lists in Europe

- [The largest companies in Europe](https://www.tamtam.ai/l/largest-companies-in-europe) (213,526)
- [Multinational companies in Europe](https://www.tamtam.ai/l/multinational-companies-in-europe) (42,019)
- [Companies with in-house R&D in Europe](https://www.tamtam.ai/l/r-and-d-companies-in-europe) (20,166)
- [Retail chains in Europe](https://www.tamtam.ai/l/retail-chains-in-europe) (19,258)
- [Manufacturers in Europe](https://www.tamtam.ai/l/manufacturers-in-europe) (18,151)
- [Professional services firms in Europe](https://www.tamtam.ai/l/professional-services-firms-in-europe) (13,699)
- [SaaS companies in Europe](https://www.tamtam.ai/l/saas-companies-in-europe) (13,682)
- [Software Development companies in Europe](https://www.tamtam.ai/l/software-development-companies-in-europe) (12,950)
- [Financial services firms in Europe](https://www.tamtam.ai/l/financial-services-firms-in-europe) (12,941)
- [IT Services and IT Consulting companies in Europe](https://www.tamtam.ai/l/it-services-and-it-consulting-companies-in-europe) (11,704)
- [IT services companies in Europe](https://www.tamtam.ai/l/it-services-companies-in-europe) (11,376)
- [Hardware manufacturers in Europe](https://www.tamtam.ai/l/hardware-companies-in-europe) (10,563)
- [Family-owned companies in Europe](https://www.tamtam.ai/l/family-owned-companies-in-europe) (9,878)
- [Critical infrastructure operators in Europe](https://www.tamtam.ai/l/critical-infrastructure-operators-in-europe) (9,815)
- [Financial Services companies in Europe](https://www.tamtam.ai/l/financial-services-companies-in-europe) (9,479)
- [Public sector organisations in Europe](https://www.tamtam.ai/l/public-sector-organisations-in-europe) (8,565)
- [Education providers in Europe](https://www.tamtam.ai/l/education-companies-in-europe) (7,925)
- [Companies with a mobile app in Europe](https://www.tamtam.ai/l/companies-with-mobile-app-in-europe) (7,899)
- [Distributors and wholesalers in Europe](https://www.tamtam.ai/l/distributors-and-wholesalers-in-europe) (7,573)
- [Retail companies in Europe](https://www.tamtam.ai/l/retail-companies-in-europe) (6,240)
- [Healthcare providers in Europe](https://www.tamtam.ai/l/healthcare-providers-in-europe) (6,132)
- [E-commerce companies in Europe](https://www.tamtam.ai/l/ecommerce-companies-in-europe) (5,864)
- [Hotel and hospitality groups in Europe](https://www.tamtam.ai/l/hospitality-groups-in-europe) (5,739)
- [Subscription businesses in Europe](https://www.tamtam.ai/l/subscription-businesses-in-europe) (5,640)

## The same list elsewhere

- [Consulting firms in the world](https://www.tamtam.ai/l/consulting-firms-in-the-world) (16,009)
- [Consulting firms in France](https://www.tamtam.ai/l/consulting-firms-france) (4,251)
- [Consulting firms in the United Kingdom](https://www.tamtam.ai/l/consulting-firms-united-kingdom) (1,298)
- [Consulting firms in Germany](https://www.tamtam.ai/l/consulting-firms-germany) (584)
- [Consulting firms in the Netherlands](https://www.tamtam.ai/l/consulting-firms-netherlands) (568)
- [Consulting firms in Spain](https://www.tamtam.ai/l/consulting-firms-spain) (420)
- [Consulting firms in Italy](https://www.tamtam.ai/l/consulting-firms-italy) (337)
- [Consulting firms in Switzerland](https://www.tamtam.ai/l/consulting-firms-switzerland) (288)
- [Consulting firms in Belgium](https://www.tamtam.ai/l/consulting-firms-belgium) (285)
- [Consulting firms in Sweden](https://www.tamtam.ai/l/consulting-firms-sweden) (136)
- [Consulting firms in Denmark](https://www.tamtam.ai/l/consulting-firms-denmark) (107)
- [Consulting firms in Poland](https://www.tamtam.ai/l/consulting-firms-poland) (93)
- [Consulting firms in Portugal](https://www.tamtam.ai/l/consulting-firms-portugal) (79)
- [Consulting firms in Norway](https://www.tamtam.ai/l/consulting-firms-norway) (72)
- [Consulting firms in Ireland](https://www.tamtam.ai/l/consulting-firms-ireland) (65)
- [Consulting firms in Finland](https://www.tamtam.ai/l/consulting-firms-finland) (55)
- [Consulting firms in Austria](https://www.tamtam.ai/l/consulting-firms-austria) (48)
- [Consulting firms in Luxembourg](https://www.tamtam.ai/l/consulting-firms-luxembourg) (37)
- [Consulting firms in the Czech Republic](https://www.tamtam.ai/l/consulting-firms-czech-republic) (27)

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Source: https://www.tamtam.ai/l/consulting-firms-in-europe