Best IT Consulting Firms in 2026

Deloitte is a global network of member firms providing audit, tax, legal, risk and consulting services. Its consulting business is organised into Strategy, Risk & Transactions and Technology & Transformation, the latter covering enterprise platforms, cloud, data and cyber work. For the fiscal year ending 31 May 2026 the network reported aggregate global revenue of US$74.5bn, 5.7% higher in US dollars than a year earlier, and a workforce of nearly 500,000. The revenue figure covers all service lines, so it overstates the size of the consulting practice relative to pure-play firms. Technology & Transformation revenue grew 2.5% in local currency in FY2026, the slowest of the consulting lines named in the release. Deloitte's audit relationships restrict what consulting work it can sell to audit clients under independence rules, which affects some buyers.

Accenture is the largest stand-alone listed company in IT consulting and services. In the fiscal year ended 31 August 2026 it reported revenue of US$74.18bn, up 6% in US dollars and 5% in local currency, with new bookings of US$84.54bn. Revenue was split between consulting (US$36.88bn) and managed services (US$37.30bn), and the company stated a workforce of approximately 814,000 people. Its offer spans strategy, technology implementation, cloud and data, security, operations outsourcing and, through Accenture Song, marketing and experience design. In fiscal 2025 the company reported US$5.9bn of new bookings for generative AI work. For fiscal 2027 it guided to local-currency growth of 3% to 6%.

NTT DATA is the IT services arm of Japan's NTT group, formed in 1988 and headquartered in Toyosu, Tokyo. It reported net sales of ¥4,638.7bn for the fiscal year ended 31 March 2025 and 197,800 consolidated employees at that date. The group combines a large Japanese public-sector and financial-services systems business with international consulting and integration operations built largely through acquisition, and it also runs data-centre and network businesses, so not all of its revenue is consulting. Its global footprint makes it a common choice for multinationals with significant operations in Japan and the wider Asia-Pacific region, and for clients that want consulting, infrastructure and data-centre capacity from one supplier.

Capgemini, created in 1967, is a Paris-listed consulting, technology and engineering services group. It reported 2025 revenues of €22,465m, up 1.7% (3.4% at constant currency), and a year-end headcount of 423,400, up 24% largely because of the acquisition of WNS. The company spent about €3.8bn on acquisitions in 2025, WNS being the largest, which adds business-process and analytics operations to its consulting, application, cloud and engineering services. Capgemini Invent provides strategy and design consulting, and Capgemini Engineering serves product and R&D clients. France accounted for 19% of revenue in 2025 and declined 4.1%, while North America grew 7.3% at constant currency.

Cognizant is a Nasdaq-listed IT services company whose results releases are issued from Teaneck, New Jersey. It reported full-year 2025 revenue of US$21.1bn, up 7.0%, and a total headcount of 351,600 at 31 December 2025. Trailing-twelve-month bookings were US$28.4bn, and the acquisition of the engineering services firm Belcan contributed about 2.6 percentage points of growth in 2025. Cognizant is strongest in financial services, healthcare and life sciences, where it provides application development and maintenance, platform implementation, digital engineering and business-process services. Its delivery model relies heavily on offshore centres, which keeps rates below those of the Western consulting firms but places more of the work away from the client's site.

IBM Consulting is the services segment of IBM, comprising Strategy & Technology and Intelligent Operations. It reported 2025 revenue of US$21,055m, up 2% and flat at constant currency. The business implements third-party platforms such as SAP, Salesforce, Oracle and Microsoft, but its distinguishing feature is its link to IBM's own software, including Red Hat OpenShift and the watsonx AI and data products, and to IBM infrastructure. Clients that are standardising on Red Hat hybrid cloud or IBM mainframes often use it for that reason. The segment's growth lagged IBM's software and infrastructure segments in 2025, and buyers should expect solutions that favour IBM technology where it fits.

Kyndryl took over IBM's managed infrastructure services business and now operates as an independent NYSE-listed company. It describes itself as the world's largest provider of IT infrastructure services and says it counts 75% of the Fortune 100 as customers. In the fiscal year ended 31 March 2026 it reported revenue of US$15.1bn, flat on a reported basis and down 3% at constant currency, with signings of US$13.5bn including 38 contracts above US$50m. Its consulting work is concentrated on data-centre, mainframe, network, cloud migration and security operations, and it has grown revenue tied to its partnerships with the hyperscale cloud providers. It is a narrower choice than the general integrators for application or business-process change.

DXC Technology, whose results are issued from Ashburn, Virginia, reported fiscal 2026 revenue (year to March 2026) of US$12.64bn, down 1.8% and down 4.8% on an organic basis. Its Consulting and Engineering Services segment generated US$5,023m, its Global Infrastructure Services segment US$6,342m, and an Insurance Software & Services business the balance. DXC serves many long-standing outsourcing clients in insurance, banking, automotive and the public sector, and its insurance software is used by carriers for policy administration. Revenue has declined for several years, and the company guided to a further organic decline of 3% to 5% for fiscal 2027, which buyers weigh when signing long contracts.

CGI was founded in 1976 and is based in Montréal, Québec. For the fiscal year ended 30 September 2026 it reported revenue of C$16.57bn, up 4.2%, and it describes a workforce of 94,000 consultants and professionals. The company operates from about 400 locations and emphasises a proximity model in which local business units hold client relationships, supported by global delivery centres; many employees hold shares and are referred to as CGI Partners. Government is a large part of its client base, and it sells its own intellectual-property products for banking, utilities and public-sector finance. Tim Hurlebaus is President and Chief Executive Officer.

Sopra Steria is a Paris-listed technology services group that describes itself as a major tech player in Europe with 51,000 employees in nearly 30 countries. It reported 2025 revenue of €5,648.0m, down 2.2%, but returned to organic growth of 1.8% in the fourth quarter; group net profit rose 18.3% to €296.8m. Year-end headcount was 51,275, of whom 8,484 worked in international service centres. Alongside consulting and systems integration, the group sells its own software for banking and human-resources administration, and it has a large public-sector and defence business in France and the United Kingdom. It is a regional rather than global choice.