5. Cognizant

Average Requests: 2017

Percentage: 0.62

Originally founded as an in-house technology unit of Dun & Bradstreet in 1994, Cognizant started serving external clients in 1996. Cognizant's IPO was launched in 1998, after a series of corporate splits and restructures of its parent companies. During the dot com bust, it grew by accepting the application maintenance work that the bigger players were unwilling to perform.

4. Wipro

Average Requests: 2944

Percentage: 0.90

Led by Azim Premji, the leading Indian IT service provider started off as an edible oil manufacturer. As of 2012, the company has over 130,000 employees and a worldwide presence with global centers across 54 countries. The company operates in four segments: IT products and services, Consumer care and lighting, Healthcare and Infrastructure engineering.

3. Deloitte

Average Requests: 2981

Percentage: 0.92

Headquartered in New York, the company is the second largest professional networking company of the world in terms of revenue. It has 182,000 employees in more than 150 countries providing audit, tax, consulting, enterprise risk and financial advisory services.