# Top 100 consulting firms in the world

Tamtam tracks 16,009 consulting firms worldwide. This list ranks the 100 largest by number of employees on LinkedIn, led by Tata Consultancy Services, Accenture and Deloitte. Their median headcount is 37,425. The most common headquarters are New York (8), Bengaluru (5) and London (5).

This list features large consulting firms operating globally, primarily focusing on IT services, business consulting, and professional services. These companies provide expertise in areas such as digital transformation, operational optimization, and technology implementation. They serve a wide range of industries and government entities worldwide. The firms listed are substantial in size, with hundreds of thousands of employees each, indicating their broad reach and capacity to handle large-scale projects. Several of these companies were founded in the late 20th century, suggesting a period of significant growth and demand for consulting services. Accenture focuses on digital transformation, while Deloitte empowers clients through advice and action. EY provides assurance and consulting across 150 countries, and Capgemini delivers end-to-end services. Tata Consultancy Services enables client transformation across the AI stack, and IBM improves technology infrastructure and consulting. The list shows a strong presence of IT Services and IT Consulting firms, indicating the importance of technology in modern business operations. This sector is well-represented, with companies like Cognizant and NTT DATA, Inc. specializing in modernizing technology and offering IT solutions. Another pattern is the global distribution of headquarters, with major players based in Mumbai, Dublin, London, and Paris, reflecting the international nature of the consulting industry.

🌍 World · 100 companies · Updated Nov 12, 2026

| # | Company | Industry | Headquarters | Employees | Founded |
|---|---|---|---|---|---|
| 1 | [Tata Consultancy Services](https://www.tamtam.ai/c/tata-consultancy-services) (tcs.com)<br>Provides technology services worldwide, enabling client transformation across the AI stack, fostering innovation, engineering excellence, and customer service for adaptive enterprises. | IT Services and IT Consulting | 🇮🇳 Mumbai | 708,725 | 1968 |
| 2 | [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 |  |
| 3 | [Deloitte](https://www.tamtam.ai/c/deloitte) (deloitte.com)<br>Global professional services firm empowering diverse talents to drive progress for clients worldwide through advice, action, and integrity | Business Consulting and Services | 🇺🇸 Worldwide | 526,765 | 1845 |
| 4 | [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 |  |
| 5 | [Cognizant](https://www.tamtam.ai/c/cognizant) (cognizant.com)<br>This company helps clients modernize technology, reimagine processes, and transform experiences to stay ahead in a rapidly changing world, improving everyday life | IT Services and IT Consulting | 🇺🇸 Teaneck | 372,148 |  |
| 6 | [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 |  |
| 7 | [IBM](https://www.tamtam.ai/c/ibm) (ibm.com)<br>It focuses on collaboration among technologists, developers, and engineers to improve technology, infrastructure, software, and consulting for better solutions. | IT Services and IT Consulting | 🇺🇸 Armonk | 335,625 |  |
| 8 | [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 |
| 9 | [KPMG](https://www.tamtam.ai/c/kpmg) (kpmg.com)<br>Global network of professional firms offering Audit, Tax and Advisory services in 146 countries Industry-focused professionals delivering value with clear vision and defined values | Accounting | 🇺🇸 Toronto | 265,000 |  |
| 10 | [Concentrix](https://www.tamtam.ai/c/concentrix) (concentrix.com)<br>Provides customer experience solutions and technology, improving business performance for global brands across various industries, creating better business outcomes. | IT Services and IT Consulting | 🇺🇸 Newark | 218,681 | 1983 |
| 11 | [TECH MAHINDRA](https://www.tamtam.ai/c/tech-mahindra) (techmahindra.com)<br>Tech Mahindra offers innovative IT experiences globally, leveraging next-gen technologies for digital transformation Part of Mahindra Group, driving sustainable business and societal change | IT Services and IT Consulting | 🇮🇳 Pune | 159,000 | 1986 |
| 12 | [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 |  |
| 13 | [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 |
| 14 | [Genpact](https://www.tamtam.ai/c/genpact) (genpact.com)<br>A global professional services firm with over 125,000 employees in 30+ countries, specializing in digital operations, data, technology, and AI solutions for leading enterprises | Business Consulting and Services | 🇺🇸 New York | 151,199 | 1997 |
| 15 | [NTT DATA, Inc.](https://www.tamtam.ai/c/ntt-data-inc) (global.ntt)<br>A global IT services provider offering a wide range of business and technology solutions as it transitions to NTT DATA | IT Services and IT Consulting | 🇯🇵 Tokyo | 140,000 |  |
| 16 | [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 |
| 17 | [LTIMindtree](https://www.tamtam.ai/c/ltimindtree) (ltm.com)<br>A global technology consulting company driving digital transformation for enterprises, delivering superior business outcomes through domain expertise and innovative digital solutions | IT Services and IT Consulting | 🇮🇳 Mumbai | 99,387 |  |
| 18 | [DXC Technology](https://www.tamtam.ai/c/dxc-technology) (dxc.com)<br>It assists global companies in managing critical systems, modernizing IT, optimizing data, and ensuring security across various cloud environments. | IT Services and IT Consulting | 🇺🇸 Ashburn | 90,597 | 2017 |
| 19 | [Kyndryl](https://www.tamtam.ai/c/kyndryl) (kyndryl.com)<br>A global leader in designing, running, and managing advanced technology infrastructure, focusing on excellence, innovation, and advancing vital systems for human progress | IT Services and IT Consulting | 🇺🇸 New York | 90,000 | 2021 |
| 20 | [CGI](https://www.tamtam.ai/c/cgi) (cgi.com)<br>Global IT and business consulting firm delivering insights-driven, sustainable services across 21 industries worldwide to help accelerate returns on investments | IT Services and IT Consulting | 🇺🇸 Montreal | 89,000 | 1976 |
| 21 | [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 |  |
| 22 | [Accenture in India](https://www.tamtam.ai/c/accenture-in-india) (accenture.com)<br>Global professional services company specializing in digital, cloud, and security solutions across 40+ industries with a focus on technology and human ingenuity for global clients | IT Services and IT Consulting | 🇮🇳 Bengaluru | 81,860 | 1989 |
| 23 | [IQVIA](https://www.tamtam.ai/c/iqvia) (iqvia.com)<br>Provides clinical research, commercial insights, and healthcare intelligence to life sciences and healthcare industries, accelerating medical treatments for better patient outcomes. | Hospitals and Health Care | 🇺🇸 Durham | 80,633 | 1954 |
| 24 | [CBRE](https://www.tamtam.ai/c/cbre) (cbre.com)<br>A real estate company providing comprehensive services and insights to empower clients in maximizing opportunities and success in the industry | Real Estate | 🇺🇸 Dallas | 75,008 |  |
| 25 | [Jacobs](https://www.tamtam.ai/c/jacobs) (jacobs.com)<br>Delivering outcomes and solutions for complex challenges in advanced manufacturing, cities, energy, environment, life sciences, transportation, and water, from advisory to lifecycle management. | Business Consulting and Services | 🇺🇸 Dallas | 68,461 | 1947 |
| 26 | [Sutherland](https://www.tamtam.ai/c/sutherland-pittsford) (sutherlands.com)<br>A digital transformation company focused on creating human-centered brand experiences through design, analytics, AI, cognitive technology, and automation | IT Services and IT Consulting | 🇺🇸 Pittsford (Rochester) | 67,102 | 1986 |
| 27 | [EPAM Systems](https://www.tamtam.ai/c/epam-systems) (epam.com)<br>Global digital transformation services provider specializing in product development and engineering, creating better enterprise, education, and health platforms worldwide | IT Services and IT Consulting | 🇺🇸 Newtown | 66,049 | 1993 |
| 28 | [WNS](https://www.tamtam.ai/c/wns) (wns.com)<br>Global provider of digital-led business transformation, combining industry knowledge, technology, analytics, and process expertise to deliver innovative solutions. | Business Consulting and Services | 🇺🇸 New York | 61,367 | 1996 |
| 29 | [EXL](https://www.tamtam.ai/c/exl) (exlservice.com)<br>The company partners with businesses to tailor data-driven solutions, improve efficiency, enhance customer relationships, and drive revenue growth through collaboration and technology | Business Consulting and Services | 🇺🇸 New York | 58,974 | 1999 |
| 30 | [AECOM](https://www.tamtam.ai/c/aecom) (aecom.com)<br>A global infrastructure consulting firm providing professional services in advisory, planning, design, engineering, and construction management for public and private-sector clients | Civil Engineering | 🇺🇸 Dallas | 57,963 |  |
| 31 | [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 |  |
| 32 | [Restaurante](https://www.tamtam.ai/c/restaurante) (gonzaloveci.com)<br>A restaurant located in San Pedro Sula, offering food and dining services to customers in the area | Operations Consulting | 🇺🇸 Zurich | 53,004 | 2023 |
| 33 | [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 |
| 34 | [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 |  |
| 35 | [Avanade](https://www.tamtam.ai/c/avanade) (avanade.com)<br>Innovative provider of digital, cloud, and advisory services within the Microsoft ecosystem, focused on making a human impact, solving challenges, and promoting sustainability and diversity | IT Services and IT Consulting | 🇺🇸 Seattle | 50,000 | 2000 |
| 36 | [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 |  |
| 37 | [NTT DATA](https://www.tamtam.ai/c/ntt-data) (nttdata.com)<br>Providing IT and business consulting, digital transformation, managed services, and industry solutions to clients worldwide for long-term success. | IT Services and IT Consulting | 🇯🇵 Tokyo | 48,385 |  |
| 38 | [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 |  |
| 39 | [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 |
| 40 | [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 |  |
| 41 | [C.S](https://www.tamtam.ai/c/csc-1120)<br>The company does amazing things. These amazing things happen daily. They are involved in many amazing projects and activities. | IT Services and IT Consulting | 🇺🇸 Global | 44,000 | 1959 |
| 42 | [Mphasis](https://www.tamtam.ai/c/mphasis) (mphasis.com)<br>A leading applied technology services company focused on innovation, customer-centric solutions, digital transformation, and disruptive technology to keep clients ahead in the marketplace | IT Services and IT Consulting | 🇮🇳 Bengaluru | 43,722 |  |
| 43 | [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 |  |
| 44 | [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 |
| 45 | [L&T Technology Services](https://www.tamtam.ai/c/l-and-t-technology-services) (ltts.com)<br>Provides engineering and technology services globally, supporting product design, development, and delivery across diverse industries with innovation. | Engineering Services | 🇮🇳 Vadodara | 41,420 |  |
| 46 | [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 |  |
| 47 | [Boston Consulting Group (BCG)](https://www.tamtam.ai/c/boston-consulting-group-bcg) (bcg.com)<br>A global management consulting firm that partners with organizations to tackle challenges, drive growth, and create positive societal impact through innovative solutions | Business Consulting and Services | 🇺🇸 Boston | 40,412 | 1963 |
| 48 | [Marsh McLennan](https://www.tamtam.ai/c/marsh-mclennan) (corporate.marsh.com)<br>Provides risk management, strategic consulting, and human resources solutions to clients worldwide, enhancing their ability to navigate challenges and seize opportunities. | Professional Services | 🇺🇸 New York | 40,340 | 1871 |
| 49 | [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 |
| 50 | [Worley](https://www.tamtam.ai/c/worley) (worley.com)<br>Global professional services company specializing in energy, chemicals, and resources, providing integrated solutions for project delivery and asset management | Professional Services | 🇦🇺 Sydney | 37,425 |  |
| 51 | [Booz Allen Hamilton](https://www.tamtam.ai/c/booz-allen-hamilton) (boozallen.com)<br>Innovative technology consulting firm advancing critical missions through AI, cybersecurity, and engineering solutions, empowering clients to shape the future | Software Development | 🇺🇸 McLean | 37,244 | 1914 |
| 52 | [SAIC](https://www.tamtam.ai/c/saic) (bit.ly)<br>Advanced technology mission integrator delivering secure high-end solutions in mission IT, enterprise IT, engineering, and professional services for defense, space, and intelligence. | Defense and Space Manufacturing | 🇺🇸 Reston | 36,645 | 1969 |
| 53 | [GlobalLogic](https://www.tamtam.ai/c/globallogic) (globallogic.com)<br>A global product development services leader, combining software engineering expertise and industry experience to help customers design and deliver next-generation products and digital experiences | Software Development | 🇺🇸 Santa Clara | 35,494 |  |
| 54 | [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 |  |
| 55 | [Deloitte India (Offices of the US)](https://www.tamtam.ai/c/deloitte-india-offices-of-the-us) (deloitte.com)<br>A region within a global organization providing professional services in India to their US-based parent companies across various sectors | Management Consulting | 🇮🇳 Hyderabad | 33,190 | 1895 |
| 56 | [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 |  |
| 57 | [American Express Global Business Travel](https://www.tamtam.ai/c/american-express-global-business-travel) (amexglobalbusinesstravel.com)<br>Provides corporate travel management solutions including marketplace access, software, and services to facilitate business travel and events worldwide. | Travel Arrangements | 🇺🇸 New York | 32,135 |  |
| 58 | [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 |  |
| 59 | [KBR, Inc.](https://www.tamtam.ai/c/kbr-inc) (kbr.com)<br>Providing science, technology, and engineering solutions to governments and companies worldwide addressing significant contemporary challenges and opportunities. | IT Services and IT Consulting | 🇺🇸 Houston | 31,433 |  |
| 60 | [KPMG India](https://www.tamtam.ai/c/kpmg-india) (social.kpmg)<br>Provides industry-tailored, technology-enabled business advisory services to over 2700 companies across 14 Indian cities, leveraging local professionals and global service delivery. | Business Consulting and Services | 🇮🇳 Gurugram | 31,247 |  |
| 61 | [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 |
| 62 | [Persistent Systems](https://www.tamtam.ai/c/persistent-systems) (persistent.com)<br>AI-led digital engineering and enterprise modernization partner delivering innovative solutions and industry expertise to global clients across multiple sectors. | IT Services and IT Consulting | 🇮🇳 Pune | 28,947 |  |
| 63 | [PwC India](https://www.tamtam.ai/c/pwc-india) (pwc.in)<br>Professional services network providing audit, tax, legal, deals, and consulting to help clients build trust and competitive advantage. | Business Consulting and Services | 🇮🇳 Kolkata | 28,584 |  |
| 64 | [Globant](https://www.tamtam.ai/c/globant) (globant.com)<br>A digitally native company specializing in helping organizations innovate and unleash potential, with a focus on diversity, inclusion, and cybersecurity | IT Services and IT Consulting | 🇺🇸 San Francisco | 28,419 |  |
| 65 | [TEKsystems](https://www.tamtam.ai/c/teksystems) (teksystems.com)<br>Global solutions provider specializing in accelerating business transformation through resolving technology, business, and talent challenges for Fortune 500 organizations | IT Services and IT Consulting | 🇺🇸 Hanover | 28,131 | 1983 |
| 66 | [Tetra Tech](https://www.tamtam.ai/c/tetra-tech) (tetratech.com)<br>A global provider of consulting and engineering services, specializing in innovative technical solutions for water, environment, infrastructure, energy, and international development projects | Civil Engineering | 🇺🇸 Pasadena | 27,460 |  |
| 67 | [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 |  |
| 68 | [Maximus](https://www.tamtam.ai/c/maximus) (maximus.com)<br>The company provides transformative technology services, digital customer experiences, and clinical health services to improve lives and support customer missions | Government Administration | 🇺🇸 McLean | 26,654 |  |
| 69 | [Robert Half](https://www.tamtam.ai/c/robert-half) (roberthalf.com)<br>Connecting skilled professionals with companies through contract, temporary, and permanent placements in finance, technology, marketing, legal, and administrative sectors. | Staffing and Recruiting | 🇺🇸 Menlo Park | 26,429 | 1948 |
| 70 | [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 |  |
| 71 | [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 |
| 72 | [Marsh Risk](https://www.tamtam.ai/c/marsh-risk) (marsh.com)<br>A global leader in insurance brokerage and risk advisory, providing data-driven solutions and advisory services to clients worldwide | Insurance | 🇺🇸 New York | 26,000 |  |
| 73 | [LHH](https://www.tamtam.ai/c/lhh) (lhh.com)<br>Global HR solutions provider offering advisory, career transition, leadership development, and recruitment services to organizations and individuals worldwide. | Human Resources Services | 🇺🇸 Jacksonville | 25,394 |  |
| 74 | [Mercer España](https://www.tamtam.ai/c/mercer-espana) (mercer.com)<br>Mercer is a global consultancy business focused on providing trusted advice and solutions to help organizations build brighter, healthier, and more sustainable futures | Professional Training and Coaching | 🇺🇸 New York | 25,000 | 1945 |
| 75 | [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 |  |
| 76 | [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 |
| 77 | [Wipro Ltd. - India](https://www.tamtam.ai/c/wipro-ltd-india) (wipro.com)<br>A leading provider of IT services leveraging technology solutions to enable business transformation, aligning IT strategies with business goals | IT Services and IT Consulting | 🇮🇳 Bengaluru | 24,515 | 1945 |
| 78 | [NTT DATA North America](https://www.tamtam.ai/c/ntt-data-north-america) (us.nttdata.com)<br>provides business and technology consulting, data and AI solutions, application development, infrastructure management, and industry-specific services globally | IT Services and IT Consulting | 🇺🇸 Plano | 24,414 |  |
| 79 | [Stefanini Group](https://www.tamtam.ai/c/stefanini-group) (stefanini.com)<br>A global company offering a wide range of innovative services such as automation, cloud, IoT, UX, AI, consulting, and marketing solutions | IT Services and IT Consulting | 🇧🇷 São Paulo | 24,358 |  |
| 80 | [Publicis Sapient](https://www.tamtam.ai/c/publicis-sapient) (publicissapient.com)<br>A digital business transformation partner, specializing in strategy, product, experience, engineering, data, and delivering impactful solutions to global organizations | Business Consulting and Services | 🇺🇸 Boston | 24,251 |  |
| 81 | [Bain & Company](https://www.tamtam.ai/c/bain-and-company) (bain.com)<br>Global consultancy aiding ambitious change makers define the future, achieving extraordinary results, outperforming competition, redefining industries, and tackling urgent societal challenges. | Business Consulting and Services | 🇺🇸 Boston | 23,729 |  |
| 82 | [Unisys](https://www.tamtam.ai/c/unisys) (unisys.com)<br>A global technology solutions company offering digital workplace, cloud, applications & infrastructure, enterprise computing, and business process solutions to empower organizations | IT Services and IT Consulting | 🇺🇸 Blue Bell | 23,358 |  |
| 83 | [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 |  |
| 84 | [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 |  |
| 85 | [Gartner](https://www.tamtam.ai/c/gartner) (gartner.com)<br>A global company providing expert-led research and data-driven insights to help executives make faster, smarter decisions and achieve stronger performance | Information Services | 🇺🇸 Stamford | 22,206 | 1979 |
| 86 | [Parexel](https://www.tamtam.ai/c/parexel) (parexel.com)<br>Provides comprehensive clinical development services globally, from early to late phase trials, helping new treatments reach patients faster through expertise and innovation. | Pharmaceutical Manufacturing | 🇺🇸 Raleigh | 21,982 | 1982 |
| 87 | [TCS](https://www.tamtam.ai/c/tcs-brownsburg)<br>A full lifecycle IT professional services and software firm in Brownsburg, IN, offering tailored solutions and managed services for optimized technology investments | IT Services and IT Consulting | 🇺🇸 Brownsburg | 21,901 |  |
| 88 | [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 |
| 89 | [Korn Ferry](https://www.tamtam.ai/c/korn-ferry) (kornferry.com)<br>It is a global consulting firm specializing in organizational design, hiring, workforce motivation, and professional development for career advancement. | Business Consulting and Services | 🇺🇸 Los Angeles | 21,328 |  |
| 90 | [Quest Global](https://www.tamtam.ai/c/quest-global) (questglobal.com)<br>Provides comprehensive engineering solutions across multiple industries, leveraging global expertise and digital technologies to solve complex challenges. | Engineering Services | 🇸🇬 Singapore | 21,161 |  |
| 91 | [Parsons Corporation](https://www.tamtam.ai/c/parsons-corporation) (parsons.com)<br>A digitally enabled solutions provider creating future defense, intelligence, and critical infrastructure solutions with an agile and innovative approach | Civil Engineering | 🇺🇸 Chantilly | 20,710 |  |
| 92 | [Cyient](https://www.tamtam.ai/c/cyient) (cyient.com)<br>This company partners with global innovators to deliver engineering and technology solutions for a digital, autonomous, and sustainable future | Engineering Services | 🇮🇳 Hyderabad | 20,539 | 1991 |
| 93 | [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 |
| 94 | [ITC Infotech](https://www.tamtam.ai/c/itc-infotech) (itcinfotech.com)<br>Global leader in technology solutions and services, specializing in digital expertise for various industries like banking, healthcare, manufacturing, consumer goods, and hospitality | IT Services and IT Consulting | 🇮🇳 Bengaluru | 20,150 | 2000 |
| 95 | [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 |  |
| 96 | [RSM US LLP](https://www.tamtam.ai/c/rsm-us-llp) (rsmus.com)<br>Provider of assurance, tax, and consulting services focused on middle market clients with a global presence and professional development culture. | Accounting | 🇺🇸 Chicago | 19,700 | 1926 |
| 97 | [Mindtree](https://www.tamtam.ai/c/mindtree) (ltm.com)<br>A technology company facilitating fast-tracked evolution for businesses with a focus on innovation and collaboration for a future-forward approach | IT Services and IT Consulting | 🇮🇳 Bengaluru | 19,600 |  |
| 98 | [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 |  |
| 99 | [dentsu](https://www.tamtam.ai/c/dentsu) (dentsu.com)<br>Helping brands predict future opportunities and create growth paths by connecting brand, content, commerce, and experience with creativity. | Advertising Services | 🇯🇵 Tokyo | 19,298 |  |
| 100 | [Insight](https://www.tamtam.ai/c/insight) (insight.com)<br>A Fortune 500 solutions integrator specializing in accelerating digital transformation, modernizing businesses, and maximizing technology value through deep partnerships | IT Services and IT Consulting | 🇺🇸 Chandler | 19,219 | 1988 |

## 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 12, 2026.

## More company lists in the world

- [The largest companies in the world](https://www.tamtam.ai/l/largest-companies-in-the-world) (415,122)
- [Multinational companies in the world](https://www.tamtam.ai/l/multinational-companies-in-the-world) (74,925)
- [Manufacturers in the world](https://www.tamtam.ai/l/manufacturers-in-the-world) (39,579)
- [Retail chains in the world](https://www.tamtam.ai/l/retail-chains-in-the-world) (35,499)
- [Companies with in-house R&D in the world](https://www.tamtam.ai/l/r-and-d-companies-in-the-world) (34,346)
- [Financial services firms in the world](https://www.tamtam.ai/l/financial-services-firms-in-the-world) (26,817)
- [Professional services firms in the world](https://www.tamtam.ai/l/professional-services-firms-in-the-world) (24,737)
- [Education providers in the world](https://www.tamtam.ai/l/education-companies-in-the-world) (23,937)
- [IT Services and IT Consulting companies in the world](https://www.tamtam.ai/l/it-services-and-it-consulting-companies-in-the-world) (23,571)
- [Critical infrastructure operators in the world](https://www.tamtam.ai/l/critical-infrastructure-operators-in-the-world) (23,312)
- [SaaS companies in the world](https://www.tamtam.ai/l/saas-companies-in-the-world) (22,459)
- [IT services companies in the world](https://www.tamtam.ai/l/it-services-companies-in-the-world) (20,934)
- [Software Development companies in the world](https://www.tamtam.ai/l/software-development-companies-in-the-world) (20,534)
- [Hardware manufacturers in the world](https://www.tamtam.ai/l/hardware-companies-in-the-world) (20,159)
- [Financial Services companies in the world](https://www.tamtam.ai/l/financial-services-companies-in-the-world) (19,958)
- [Companies with a mobile app in the world](https://www.tamtam.ai/l/companies-with-mobile-app-in-the-world) (18,922)
- [Public sector organisations in the world](https://www.tamtam.ai/l/public-sector-organisations-in-the-world) (18,493)
- [Healthcare providers in the world](https://www.tamtam.ai/l/healthcare-providers-in-the-world) (16,037)
- [Family-owned companies in the world](https://www.tamtam.ai/l/family-owned-companies-in-the-world) (14,667)
- [Distributors and wholesalers in the world](https://www.tamtam.ai/l/distributors-and-wholesalers-in-the-world) (13,470)
- [Hospitals and Health Care companies in the world](https://www.tamtam.ai/l/hospitals-and-health-care-companies-in-the-world) (12,916)
- [Corporate groups and holding companies in the world](https://www.tamtam.ai/l/holding-companies-in-the-world) (12,864)
- [E-commerce companies in the world](https://www.tamtam.ai/l/ecommerce-companies-in-the-world) (12,013)
- [Higher Education companies in the world](https://www.tamtam.ai/l/higher-education-companies-in-the-world) (11,756)

## The same list elsewhere

- [Consulting firms in Europe](https://www.tamtam.ai/l/consulting-firms-in-europe) (8,900)
- [Consulting firms in the United States](https://www.tamtam.ai/l/consulting-firms-united-states) (4,382)
- [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 Asia](https://www.tamtam.ai/l/consulting-firms-in-asia) (1,078)
- [Consulting firms in India](https://www.tamtam.ai/l/consulting-firms-india) (688)
- [Consulting firms in Latin America](https://www.tamtam.ai/l/consulting-firms-in-latin-america) (652)
- [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 Brazil](https://www.tamtam.ai/l/consulting-firms-brazil) (387)
- [Consulting firms in Canada](https://www.tamtam.ai/l/consulting-firms-canada) (345)
- [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 Australia](https://www.tamtam.ai/l/consulting-firms-australia) (210)
- [Consulting firms in the Middle East](https://www.tamtam.ai/l/consulting-firms-in-the-middle-east) (210)
- [Consulting firms in Africa](https://www.tamtam.ai/l/consulting-firms-in-africa) (204)
- [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 China](https://www.tamtam.ai/l/consulting-firms-china) (82)
- [Consulting firms in Mexico](https://www.tamtam.ai/l/consulting-firms-mexico) (82)
- [Consulting firms in Portugal](https://www.tamtam.ai/l/consulting-firms-portugal) (79)

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