Google:

The technology company has its headquarters in Mountain View, California, United States and has an employee base of over 10000. With focus on internet related products and services, the company is on the path of making global information accessible to all. The company's line of services includes provides web-based search, advertisements, maps, software applications, mobile operating systems, consumer content, enterprise solutions, commerce, and hardware products.

Offices: Bengaluru, Gurgaon, Hyderabad and Mumbai

Amazon:

The online retailer with headquarters in Seattle WA, USA stands second in the list. The company also has cloud computing business and offers a range of products and streaming services.

Offices: Bangalore, Chennai, New Delhi, Hyderabad and Mumbai.

Intel:

Headquartered in Santa Clara, California, United States. The tech company engages in designing, manufacturing and selling computer components and related accessories. The major products of the company include microprocessors and semiconductor chips.

Offices: Ahmedabad, Bangalore, Chennai, Gurgaon, Hyderabad, Kolkata, Mumbai, New Delhi, Noida, Pune and Secunderabad.

IBM:

Headquartered in Armonk New York, United States with an employee strength of over 10000 employees. The company through the use advanced IT manufactures hardware, middleware and software.

Offices: Ahmedabad, Bangalore, Bhubaneshwar, Chandigarh, Chennai, Coimbatore, Gurgaon, Hyderabad, Kolkata, Mumbai, New Delhi, Noida, Pune and Visakhapatnam

Tata Consultancy Services (TCS)

With headquarters in Mumbai, the technology arm of the conglomerate Tata Group, offers consultancy and technology service solution.

Offices: Ahmedabad, Bangalore, Bhopal, Bhubaneswar, Chennai, Coimbatore, Gandhinagar, Gurugram, Hyderabad, Jamshedpur, Kochi, Kolkata, Lucknow, Mapusa, Mumbai, Nagpur, New Delhi, Noida, Patna, Pune, Raipur, Trivandrum and Vadodara.