Bing gains market share while Google continues to grow

However, according to Greg Sterling, principal analyst at Sterling Market Intelligence, Bing's continued growth may not be making Google all that nervous.

"Interestingly, Google doesn't appear to be suffering," he said. "It's Yahoo, AOL and Ask that are apparently seeing losses."

Market-research firm, comScore issued its October U.S. search-engine rankings and figures have shown that Google's share of the search-engine market is still growing. Google earned 65.4 percent of the market in October, compared to 64.9 percent in September.

Google's dominance seems unshaken as combined market shares of Bing and Yahoo have less than half the market share that Google boasts - all this despite having Microsoft inking a search-partnership deal with Yahoo in July to target Google.

According to comScore, Yahoo's performance continues to disappoint even with recent major investments into innovative features. The once-dominant search engine slipped to 18 percent market share compared to 18.8 percent in September.

Yahoo may be the biggest loser in October but at 18 percent, the search engine is set for a new low. In September, Yahoo launched a global brand campaign to realign its business around simplifying and enhancing the web experience for people around the world. The company also sold various divisions recently in order to "focus" better on its primary businesses.