The following is a list of the largest notable information technology consulting firms in the world, along with their corporate headquarters location and the total number of consultants they have. Many of these serve primarily as third-party consultants and outsourcing partners. Many enterprise software companies employ their own consultants for services related to their own products. Among the corporations listed below, the number of consultants listed is less than their total number of employees. Note: Not all employees of these firms are consultants and firms with less than 10,000 employees are not included.
Name | Headquarters | Total employees | As of |
---|---|---|---|
Tata Consultancy Services | Mumbai, India | 614,795 | March 2023 [1] |
Infosys | Bengaluru, India | 343,234 | March 2023 [2] |
Wipro | Bengaluru, India | 256,921 | March 2023 [3] |
HCL Technologies | Noida, India | 225,944 | March 2023 [4] |
birlasoft | Pune, India | 12,193 | March 2023 [5] |
Tech Mahindra | Pune, India | 152,400 | March 2023 [6] |
Hinduja Global Solutions | Bengaluru, India | 21,685 | December 2022 [7] |
WNS Global Services | Mumbai, India | 59,755 | March 2023 [8] |
eClerx | Mumbai, India | 16,804 | December 2022 [9] |
ITC Infotech | Bengaluru, India | 12,000 | June 2021 [10] |
NTT Data | Tokyo, Japan | 195,100 | March 2023 [11] |
firstsource | Mumbai, India | 23,018 | March 2023 [12] |
Fujitsu | Tokyo, Japan | 124,216 | March 2022 [13] |
LTIMindtree | Mumbai, India | 84,546 | March 2023 [14] |
Mphasis | Bengaluru, India | 34,042 | March 2023 [15] |
Pactera | Dalian, China | 23,954 | |
Neusoft Group | Shenyang, China | 20,000 | December 2020 [16] |
L&T Technology Services | Vadodara, India | 22,233 | March 2023 [17] |
Persistent Systems | Pune, India | 22,598 | March 2023 [18] |
Cyient | Hyderabad, India | 15,864 | March 2023 [19] |
KPIT Technologies | Pune, India | 11,013 | March 2023 [20] |
Coforge | Noida, India | 23,224 | March 2023 [21] |
Zensar Technologies | Pune, India | 10,563 | March 2023 [22] |
Datamatics | Mumbai, India | 10,744 | March 2022 [23] |
NCS Group | Singapore | 10,000 | |
Name | Headquarters | Total employees | As of |
---|---|---|---|
Accenture | Dublin, Ireland | 738,143 | February 2023 [24] |
Alten | Boulogne-Billancourt, France | 54,100 | December 2022 [25] |
Asseco | Rzeszow, Poland | 32,400 | January 2023 [26] |
Atos | Bezons, France | 110,270 | March 2023 [27] |
Capgemini | Paris, France | 342,700 | September 2023 [28] |
Deloitte | London, England | 415,000 | May 2022 [29] |
Ernst & Young | London, England | 365,399 | June 2022 [30] |
Globant | Luxembourg City, Luxembourg | 27,500 | September 2023 [31] |
Grant Thornton International | London, England | 62,000 | December 2022 [32] |
Indra | Madrid, Spain | 56,573 | March 2023 [33] |
KPMG | Amstelveen, Netherlands | 273,424 | September 2023 [34] |
Luxoft | Zug, Switzerland | 17,000 | March 2023 |
Orange Business Services | Paris, France | 29,100 | December 2022 [35] |
PricewaterhouseCoopers | London, England | 364,232 | June 2023 [36] |
Sopra Steria | Paris, France | 53,724 | March 2023 [37] |
TietoEVRY | Espoo, Finland | 24,071 | March 2023 [38] |
T-Systems | Frankfurt, Germany | 28,000 | December 2022 [39] |
Name | Headquarters | Total employees | As of |
---|---|---|---|
Avanade | Seattle, Washington, United States | 50,000 | December 2021 [40] |
Booz Allen Hamilton | McLean, Virginia, United States | 25,803 | February 2019 [41] |
CGI Inc. | Montreal, Canada | 91,000 | March 2023 [42] |
Cognizant Technology Solutions | Teaneck, New Jersey, United States | 351,500 | March 2023 [43] |
Conduent | Florham Park, New Jersey, United States | 58,600 | March 2023 [44] |
DXC Technology | Tysons, Virginia, United States | 134,035 | December 2022 [45] |
EPAM Systems | Newtown, Pennsylvania, United States | 57,450 | March 2023 [46] |
EXL Service | New York City, New York, United States | 45,400 | December 2022 [47] |
Genpact | New York City, New York, United States | 119,000 | March 2023 [48] |
Hewlett Packard Enterprise | Spring, Texas, United States | 60,200 | March 2023 [49] |
Leidos | San Diego, California, United States | 45,000 | December 2022 [50] |
Kyndryl | New York, New York, United States | 87,708 | January 2023 [51] |
Softtek | Monterrey, Mexico | 12,000 | November 2017 [52] |
Science Applications International Corporation | Reston, Virginia, United States | 23,000 | February 2019 [53] |
Telus International | Vancouver, Canada | 58,000 | December 2020 [54] |
Unisys | Blue Bell, Pennsylvania, United States | 17,200 | December 2020 [55] |
UST | Aliso Viejo, California, United States | 30,000 | October 2023 |
Virtusa | Southborough, Massachusetts, United States | 30,000 | October 2020 |
Gartner | Stamford, Connecticut, United States | 19,830 | March 2023 [56] |
Slalom Consulting | Seattle, Washington, United States | 13,000 | April 2023 [57] |
Name | Headquarters | Total company employees | As of |
---|---|---|---|
Algar Tech | Uberlândia, Brazil | 21,000 | November 2022 [58] [ circular reference ] |
Totvs | São Paulo, Brazil | 12,000 | November 2022 [59] [ circular reference ] |
Stefanini IT Solutions | Jaguariúna, Brazil | 30,000 | April 2022 [60] |
Generally speaking, a calendar year begins on the New Year's Day of the given calendar system and ends on the day before the following New Year's Day, and thus consists of a whole number of days. A year can also be measured by starting on any other named day of the calendar, and ending on the day before this named day in the following year. This may be termed a "year's time", but not a "calendar year". To reconcile the calendar year with the astronomical cycle certain years contain extra days. The Gregorian year, which is in use in most of the world, begins on January 1 and ends on December 31. It has a length of 365 days in an ordinary year, with 8760 hours, 525,600 minutes, or 31,536,000 seconds; but 366 days in a leap year, with 8784 hours, 527,040 minutes, or 31,622,400 seconds. With 97 leap years every 400 years, the year has an average length of 365.2425 days. Other formula-based calendars can have lengths which are further out of step with the solar cycle: for example, the Julian calendar has an average length of 365.25 days, and the Hebrew calendar has an average length of 365.2468 days. The Lunar Hijri calendar is a lunar calendar consisting of 12 months in a year of 354 or 355 days. The astronomer's mean tropical year, which is averaged over equinoxes and solstices, is currently 365.24219 days, slightly shorter than the average length of the year in most calendars.
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