Bangalore: The top three Indian IT services firms, TCS, Infosys and Wipro, have increased their share of the country's export revenues to 41 per cent in the current year, up from 26 per cent three years ago, says IT research firm Forrester.

Sudin Apte, senior analyst and country head for Forrester in India, said at a press conference in Bangalore yesterday, "The top three are pulling further ahead in revenue growth when compared to other players."

He said that TCS, Infosys and Wipro were growing well above the industry average, while a majority were performing below it, which pointed to industry undergoing a massive polarisation.

"Over 500-odd firms are growing at or less than the industry average, while some of them struggle with revenue and profit growth. As a result, polarisation of Indian IT firms accelerates with every passing quarter," Apte said.

Apte said for the 'billion-dollar babies' ie Cognizant, Satyam and HCL Technologies, the next two years would prove to be the last window of opportunity to catch up with their larger peers.

Small and medium firms, according to him, were on shaky ground as their "diminishing brands" fail to attract talent, while dispersed client base prevented them from building domain skills. "They need to specialise", he stressed.