Quarterly revenue from Europe rose 35 per cent, the strongest growth since the company started breaking out revenue by region two years ago.
The Teaneck, New Jersey-based company's revenue from the region grew 22.7 per cent in the year-earlier quarter.
Europe contributed $470.1 million, or 19.4 per cent, to total revenue in the quarter ended March 31.
Revenue growth in North America, Cognizant's biggest market, slowed slightly to 16.1 per cent, to $1.84 billion, after rising 16.3 per cent in the first quarter of 2013.
India-based rivals Tata Consultancy Services Ltd and Infosys Ltd also reported better-than-expected profit for the quarter ended March.
Cognizant's net income rose to $348.9 million, or 57 cents per share, in the first quarter from $284.2 million, or 47 cents per share, a year earlier.
Revenue rose about 20 per cent to $2.42 billion.
Analysts on average had expected earnings of 55 cents per share on revenue of $2.43 billion, according to Thomson Reuters I/B/E/S.
Cognizant forecast revenue of $2.50 billion to $2.53 billion for the current quarter, slightly below the average analyst estimate of $2.54 billion.
The company said it continued to expect revenue to grow by at least 16.5 per cent to $10.3 billion this year. Cognizant forecast full-year adjusted earnings of at least $2.54 per share.
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