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.
| # | Company | Employees | |||
|---|---|---|---|---|---|
| 1 |
Tata Consultancy Servicestcs.com
Provides technology services worldwide, enabling client transformation across the AI stack, fostering innovation, engineering excellence, and customer service for adaptive enterprises. |
708,725 | |||
| 2 |
Accentureaccenture.com
It provides professional services to businesses and governments, focusing on digital transformation, operational optimization, and enhancing citizen services globally. |
687,682 | |||
| 3 |
Deloittedeloitte.com
Global professional services firm empowering diverse talents to drive progress for clients worldwide through advice, action, and integrity |
526,765 | |||
| 4 | 404,207 | ||||
| 5 |
Cognizantcognizant.com
This company helps clients modernize technology, reimagine processes, and transform experiences to stay ahead in a rapidly changing world, improving everyday life |
372,148 | |||
| 6 |
Capgeminicapgemini.com
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 |
342,989 | |||
| 7 | 335,625 | ||||
| 8 |
KPMG Italykpmg.com
A global professional services network providing audit, advisory, tax, and legal services to businesses worldwide, focusing on building trust and driving change |
265,000 | |||
| 9 | 265,000 | ||||
| 10 |
Concentrixconcentrix.com
Provides customer experience solutions and technology, improving business performance for global brands across various industries, creating better business outcomes. |
218,681 | |||
| 11 |
TECH MAHINDRAtechmahindra.com
Tech Mahindra offers innovative IT experiences globally, leveraging next-gen technologies for digital transformation Part of Mahindra Group, driving sustainable business and societal change |
159,000 | |||
| 12 |
Allianz Servicescareers.allianz.com
Provides specialized core insurance operations, shared services, business analytics, engineering, and management consulting to drive client experience within a global insurance group. |
159,000 | |||
| 13 |
Atentoatento.com
Leading provider of CRM and BPO services in Latin America and globally, serving multinational corporations in various industries through multiple channels |
154,000 | |||
| 14 |
Genpactgenpact.com
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 |
151,199 | |||
| 15 |
NTT DATA, Inc.global.ntt
A global IT services provider offering a wide range of business and technology solutions as it transitions to NTT DATA |
140,000 | |||
| 16 |
FUJITSUglobal.fujitsu
Leading global information and communication technology company, offering technology products, solutions, and services, connecting people, technology, and ideas for a sustainable world. |
124,000 | |||
| 17 |
LTIMindtreeltm.com
A global technology consulting company driving digital transformation for enterprises, delivering superior business outcomes through domain expertise and innovative digital solutions |
99,387 | |||
| 18 |
DXC Technologydxc.com
It assists global companies in managing critical systems, modernizing IT, optimizing data, and ensuring security across various cloud environments. |
90,597 | |||
| 19 |
Kyndrylkyndryl.com
A global leader in designing, running, and managing advanced technology infrastructure, focusing on excellence, innovation, and advancing vital systems for human progress |
90,000 | |||
| 20 | 89,000 | ||||
| 21 | 85,294 | ||||
| 22 |
Accenture in Indiaaccenture.com
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 |
81,860 | |||
| 23 | 80,633 | ||||
| 24 | 75,008 | ||||
| 25 |
Jacobsjacobs.com
Delivering outcomes and solutions for complex challenges in advanced manufacturing, cities, energy, environment, life sciences, transportation, and water, from advisory to lifecycle management. |
68,461 | |||
| 26 |
Sutherlandsutherlands.com
A digital transformation company focused on creating human-centered brand experiences through design, analytics, AI, cognitive technology, and automation |
67,102 | |||
| 27 |
EPAM Systemsepam.com
Global digital transformation services provider specializing in product development and engineering, creating better enterprise, education, and health platforms worldwide |
66,049 | |||
| 28 | 61,367 | ||||
| 29 |
EXLexlservice.com
The company partners with businesses to tailor data-driven solutions, improve efficiency, enhance customer relationships, and drive revenue growth through collaboration and technology |
58,974 | |||
| 30 | 57,963 | ||||
| 31 | 55,656 | ||||
| 32 |
Restaurantegonzaloveci.com
A restaurant located in San Pedro Sula, offering food and dining services to customers in the area |
53,004 | |||
| 33 |
Almaviva Groupalmavivagroup.com
Provides digital innovation and ICT solutions globally, supporting business model transformation and competitiveness across public and private sectors. |
52,112 | |||
| 34 |
BDObdo.global
Providing professional services globally with 1800 offices, focusing on quality, technology, and innovative solutions for long-term client value. |
51,974 | |||
| 35 |
Avanadeavanade.com
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 |
50,000 | |||
| 36 | 49,000 | ||||
| 37 |
NTT DATAnttdata.com
Providing IT and business consulting, digital transformation, managed services, and industry solutions to clients worldwide for long-term success. |
48,385 | |||
| 38 |
Sopra Steriasoprasteria.com
Offers consulting, digital services, and solutions, assisting large companies and organizations with digital transformation, improving competitiveness through technology and collaboration. |
47,609 | |||
| 39 |
Minsaitminsait.com
A leading Spanish technological consultant operating globally, leveraging cloud, security, payments, and innovative technology to drive business and societal impact #MoreMinsait |
45,000 | |||
| 40 |
Capgemini Engineeringcapgemini.com
Engineering R&D services, combining broad industry knowledge and cutting-edge digital and software technologies to accelerate clients' journey towards Intelligent Industry. |
44,836 | |||
| 41 |
C.S
The company does amazing things. These amazing things happen daily. They are involved in many amazing projects and activities. |
44,000 | |||
| 42 |
Mphasismphasis.com
A leading applied technology services company focused on innovation, customer-centric solutions, digital transformation, and disruptive technology to keep clients ahead in the marketplace |
43,722 | |||
| 43 |
Arcadisarcadis.com
delivering transformative projects globally addressing climate, energy, and livable cities through design, engineering, architecture, and consulting for a better future |
42,295 | |||
| 44 |
Mazarsforvismazars.com
Global integrated partnership providing audit, accountancy, advisory, tax, and legal services through fifty thousand professionals across more than one hundred countries worldwide. |
42,000 | |||
| 45 |
L&T Technology Servicesltts.com
Provides engineering and technology services globally, supporting product design, development, and delivery across diverse industries with innovation. |
41,420 | |||
| 46 |
Publicis Groupepublicisgroupe.com
Helps clients transform their marketing and digital businesses, providing expertise in communications, media, data, and technology across 100+ countries. |
41,020 | |||
| 47 |
Boston Consulting Group (BCG)bcg.com
A global management consulting firm that partners with organizations to tackle challenges, drive growth, and create positive societal impact through innovative solutions |
40,412 | |||
| 48 |
Marsh McLennancorporate.marsh.com
Provides risk management, strategic consulting, and human resources solutions to clients worldwide, enhancing their ability to navigate challenges and seize opportunities. |
40,340 | |||
| 49 | 38,710 | ||||
| 50 |
Worleyworley.com
Global professional services company specializing in energy, chemicals, and resources, providing integrated solutions for project delivery and asset management |
37,425 | |||
Want more companies than this list?This page shows the largest ones only. Connect to Tamtam to see every company that matches, filter by size, industry or growth, and reach their decision-makers. | |||||
| 51 |
Booz Allen Hamiltonboozallen.com
Innovative technology consulting firm advancing critical missions through AI, cybersecurity, and engineering solutions, empowering clients to shape the future |
37,244 | |||
| 52 | 36,645 | ||||
| 53 |
GlobalLogicgloballogic.com
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 |
35,494 | |||
| 54 |
ICON plciconplc.com
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 |
35,001 | |||
| 55 |
Deloitte India (Offices of the US)deloitte.com
A region within a global organization providing professional services in India to their US-based parent companies across various sectors |
33,190 | |||
| 56 | 32,618 | ||||
| 57 |
American Express Global Business Travelamexglobalbusinesstravel.com
Provides corporate travel management solutions including marketplace access, software, and services to facilitate business travel and events worldwide. |
32,135 | |||
| 58 |
NTT DATA Europe & Latamnttdata.com
Global IT services provider transforming clients through consulting, solutions, and managed services to enable a confident move into the digital future |
31,932 | |||
| 59 | 31,433 | ||||
| 60 |
KPMG Indiasocial.kpmg
Provides industry-tailored, technology-enabled business advisory services to over 2700 companies across 14 Indian cities, leveraging local professionals and global service delivery. |
31,247 | |||
| 61 |
B. Braun Groupbbraun.com
A leading medical technology organization dedicated to protecting and improving global health through innovative solutions and collaborative culture |
29,535 | |||
| 62 |
Persistent Systemspersistent.com
AI-led digital engineering and enterprise modernization partner delivering innovative solutions and industry expertise to global clients across multiple sectors. |
28,947 | |||
| 63 | 28,584 | ||||
| 64 |
Globantglobant.com
A digitally native company specializing in helping organizations innovate and unleash potential, with a focus on diversity, inclusion, and cybersecurity |
28,419 | |||
| 65 |
TEKsystemsteksystems.com
Global solutions provider specializing in accelerating business transformation through resolving technology, business, and talent challenges for Fortune 500 organizations |
28,131 | |||
| 66 |
Tetra Techtetratech.com
A global provider of consulting and engineering services, specializing in innovative technical solutions for water, environment, infrastructure, energy, and international development projects |
27,460 | |||
| 67 |
Webhelpwebhelp.com
The company specializes in creating innovative customer journeys using data insights, AI, and human talent to drive growth for brands worldwide |
27,162 | |||
| 68 |
Maximusmaximus.com
The company provides transformative technology services, digital customer experiences, and clinical health services to improve lives and support customer missions |
26,654 | |||
| 69 |
Robert Halfroberthalf.com
Connecting skilled professionals with companies through contract, temporary, and permanent placements in finance, technology, marketing, legal, and administrative sectors. |
26,429 | |||
| 70 |
Deutsche Gesellschaft fรผr Internationale Zusammenarbeit (GIZ) GmbHgiz.de
Provides international cooperation for sustainable development and education, helping shape a future worth living worldwide, with over 50 years of experience. |
26,333 | |||
| 71 | 26,193 | ||||
| 72 |
Marsh Riskmarsh.com
A global leader in insurance brokerage and risk advisory, providing data-driven solutions and advisory services to clients worldwide |
26,000 | |||
| 73 | 25,394 | ||||
| 74 |
Mercer Espaรฑamercer.com
Mercer is a global consultancy business focused on providing trusted advice and solutions to help organizations build brighter, healthier, and more sustainable futures |
25,000 | |||
| 75 |
Kantarkantar.com
Global leader in marketing data and analytics with deep expertise, innovative technology, and insights to help clients understand people and drive growth worldwide |
24,976 | |||
| 76 |
Mott MacDonaldmottmac.com
The company focuses on improving society through digital innovation, excellence, and solving intricate challenges with clients to deliver better outcomes |
24,653 | |||
| 77 |
Wipro Ltd. - Indiawipro.com
A leading provider of IT services leveraging technology solutions to enable business transformation, aligning IT strategies with business goals |
24,515 | |||
| 78 |
NTT DATA North Americaus.nttdata.com
provides business and technology consulting, data and AI solutions, application development, infrastructure management, and industry-specific services globally |
24,414 | |||
| 79 |
Stefanini Groupstefanini.com
A global company offering a wide range of innovative services such as automation, cloud, IoT, UX, AI, consulting, and marketing solutions |
24,358 | |||
| 80 |
Publicis Sapientpublicissapient.com
A digital business transformation partner, specializing in strategy, product, experience, engineering, data, and delivering impactful solutions to global organizations |
24,251 | |||
| 81 |
Bain & Companybain.com
Global consultancy aiding ambitious change makers define the future, achieving extraordinary results, outperforming competition, redefining industries, and tackling urgent societal challenges. |
23,729 | |||
| 82 |
Unisysunisys.com
A global technology solutions company offering digital workplace, cloud, applications & infrastructure, enterprise computing, and business process solutions to empower organizations |
23,358 | |||
| 83 |
Swecoswecogroup.com
A leading consultancy co-creating sustainable solutions for urban areas through planning, design, and digital innovation with a team of 21,000 specialists |
22,591 | |||
| 84 |
Nagarronagarro.com
Innovative digital engineering company guiding clients to embrace human-centric, digital-first strategies for responsive, efficient, creative, and sustainable business growth |
22,553 | |||
| 85 |
Gartnergartner.com
A global company providing expert-led research and data-driven insights to help executives make faster, smarter decisions and achieve stronger performance |
22,206 | |||
| 86 |
Parexelparexel.com
Provides comprehensive clinical development services globally, from early to late phase trials, helping new treatments reach patients faster through expertise and innovation. |
21,982 | |||
| 87 |
TCS
A full lifecycle IT professional services and software firm in Brownsburg, IN, offering tailored solutions and managed services for optimized technology investments |
21,901 | |||
| 88 |
Inetuminetum.com
European digital services leader helping businesses, public sector, and society with digital impact, performance, and innovation, partnering with major software publishers. |
21,788 | |||
| 89 |
Korn Ferrykornferry.com
It is a global consulting firm specializing in organizational design, hiring, workforce motivation, and professional development for career advancement. |
21,328 | |||
| 90 |
Quest Globalquestglobal.com
Provides comprehensive engineering solutions across multiple industries, leveraging global expertise and digital technologies to solve complex challenges. |
21,161 | |||
| 91 |
Parsons Corporationparsons.com
A digitally enabled solutions provider creating future defense, intelligence, and critical infrastructure solutions with an agile and innovative approach |
20,710 | |||
| 92 |
Cyientcyient.com
This company partners with global innovators to deliver engineering and technology solutions for a digital, autonomous, and sustainable future |
20,539 | |||
| 93 |
Majorelfr.linkedin.com
Providing advanced, digitally-powered business services to help global brands streamline operations sustainably and deliver critical solutions worldwide. |
20,304 | |||
| 94 |
ITC Infotechitcinfotech.com
Global leader in technology solutions and services, specializing in digital expertise for various industries like banking, healthcare, manufacturing, consumer goods, and hospitality |
20,150 | |||
| 95 | 19,737 | ||||
| 96 |
RSM US LLPrsmus.com
Provider of assurance, tax, and consulting services focused on middle market clients with a global presence and professional development culture. |
19,700 | |||
| 97 | 19,600 | ||||
| 98 |
The Adecco Groupadeccogroup.com
Global talent company providing employability, digital and engineering solutions, and workforce optimization across multiple industries and countries. |
19,418 | |||
| 99 |
dentsudentsu.com
Helping brands predict future opportunities and create growth paths by connecting brand, content, commerce, and experience with creativity. |
19,298 | |||
| 100 |
Insightinsight.com
A Fortune 500 solutions integrator specializing in accelerating digital transformation, modernizing businesses, and maximizing technology value through deep partnerships |
19,219 | |||
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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.
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