The recent impact of Facebook buying Friendfeed has made great resonance in the world of social media sites and especially for facebook as it has now gained the real-time search. This is giving direct competition to Twitter which has been the best provider of real-time search so far. Twitter is really threatened by the increasing popularity of Facebook and recently, it has been noted that Facebook had double the amount of visitors as compared to Twitter in the last month.

In the month of July, according to the latest estimates from comScore, Facebook attracted 87.7 million unique visitors in the U.S., which was 14 percent higher than in June, 2009. Twitter, in contrast, only saw 21.2 million unique U.S. visitors to its Website, a 6 percent rise compared to the month before. In absolute terms, Facebook added about ten million new visitors in the month of July versus roughly one million new visitors for Twitter.

At 87.7 million unique, Facebook moves from the sixth largest Web media property in the U.S. to the fifth, passing the combined sites of Fox Interactive Media (80.9 million unique) and coming within striking range of AOL (104.8 million). That is just in the U.S. Facebook is already the fourth largest site in the world. Twitter is doing better worldwide as well, with a total of 44.5 million unique visitors in June.

However, these estimates are for Twitter is only from Twitter.com and does not include mobile or desktop clients such as Tweetdeck, Seesmic, or Tweetie, but it should be a good proxy for overall growth. So is the case with the figures of Facebook as the numbers indicated don’t include activity on other sites other apps via Facebook Connect either.