Global IT Services & Consulting Companies (2026) | Accenture, IBM, Cognizant & More

IT Services Majors

13 entries

Large multinational IT services and technology partners.

01AccentureGlobal professional services company in strategy, consulting, technology and operations. 02IBM ConsultingIBM's consulting and technology services arm for hybrid cloud and AI. 03CognizantIT services, consulting and digital engineering company. 04CapgeminiGlobal consulting, technology and digital transformation partner. 05DXC TechnologyIT services company focused on enterprise operations and modernization. 06KyndrylInfrastructure services provider spun off from IBM. 07NTT DATAJapan-based global IT services and consulting group. 08CGICanadian IT and business consulting services firm. 09AtosEuropean IT services and digital security group. 10Sopra SteriaEuropean consulting, digital services and software company. 11UnisysGlobal IT services and cloud, digital workplace and enterprise computing provider. 12FujitsuJapanese IT equipment and services company. 13GenpactProfessional services firm combining digital operations with technology services.

Big Four & Strategy Consultancies

6 entries

Professional-services firms with large technology consulting practices.

14DeloitteAudit, consulting, tax and advisory services with a large technology practice. 15PwCAssurance, advisory and consulting services across industries. 16EYAssurance, consulting, strategy and technology services. 17KPMGAudit, tax and advisory services including technology consulting. 18McKinsey & CompanyGlobal management consulting firm advising on strategy, technology and operations. 19Boston Consulting GroupStrategy consulting firm with a large digital and AI practice (BCG X).

Digital Engineering Specialists

8 entries

Product engineering and agile software consultancies.

20EPAM SystemsDigital engineering, platform and product development services. 21GlobantDigital-native technology services company. 22EndavaTechnology services company delivering digital engineering and consulting. 23ThoughtworksTechnology consultancy known for agile software engineering. 24NagarroDigital engineering and consulting company. 25GlobalLogicDigital product engineering company, part of the Hitachi group. 26SlalomModern consulting firm for strategy, technology and business transformation. 27Rackspace TechnologyMulticloud services and managed hosting provider.

Frequently Asked Questions

Which are the largest global IT services companies?

Accenture, IBM Consulting, Cognizant, Capgemini, NTT DATA and DXC are among the largest, alongside Indian majors such as TCS and Infosys.

What are the Big Four?

Deloitte, PwC, EY and KPMG are the four largest professional services networks, each with sizeable technology consulting and implementation practices.

What is the difference between IT services and consulting?

Consulting advises on strategy, architecture and transformation, while IT services build, integrate and operate systems. Most large firms do both.

Which firms specialise in digital product engineering?

EPAM, Globant, Endava, Thoughtworks, Nagarro and GlobalLogic focus on software product and platform engineering.

Where are the Indian IT services companies?

See the Indian IT Services Companies page for TCS, Infosys, Wipro, HCLTech and others.