This just in from web analytics firm Hitwise. Social network MySpace continues to see the most U.S. traffic — 72.73 percent share of the social networking market — but that’s a slight drop from its April traffic and a five percent drop from the previous May.
Meanwhile, the only other significantly large social network in the U.S., Facebook, grew 42 percent this May over last, seemingly at MySpace’s expense. See graph below for more. As I recently argued, Facebook’s advantage appears to be that it captures real-world relationships in a way that its rivals don’t, at least not as much. This may account for its increasing market share, although proving such causal relationships has yet to be done.
Aside: MyYearbook, a high school social network, keeps growing fast, even though it’s far, far smaller than either of its rivals.

6:09 am
`myspace com said:
[...] 72.73 percent share of the social networking market ?? but that??sa slight drop under its April …http://venturebeat.com/2008/06/18/hitwise-facebook-gaining-on-myspace-in-the-us/Interview with Eerie Von Eerie Von might be best known for his time as bass player for Samhain and [...]
12:41 pm
Rumor: High school social network MyYearbook raising a “huge” round » VentureBeat said:
[...] has, according to Hitwise, seen a 384 percent increase in traffic over the last year — from 0.29 percent to 1.40 [...]
9:06 pm
Teen Social Network myYearbook Gets $13 Million said:
[...] myYearbook says it sees 10 million unique visitors monthly, and also makes the claim that it is the third largest social network in the US (this may be the case, but it is only a fraction of the size of Facebook and MySpace). When we last wrote about them, there was speculation that the site may have more high school users than Facebook. This is almost certainly no longer the case (Facebook has seen dramatic growth since that time), but myYearbook continues to produce impressive stats, with 384% in year-over-year growth. [...]
9:53 pm
TechCrunch Japanese アーカイブ » 青少年向けSNSのmyYearbookが$13M(1300万ドル)を調達 said:
[...] myYearbookによると、同サイトは毎月1000万のユニークユーザーが訪れており、アメリカ国内で3番目に大きなソーシャルネットワークであると言っている(事実かもしれないが、FacebookやMySpaceに比べればごく小さいものだ)。前回同サイトを取り上げた 記事では、同サイトが高校生のユーザーに限ってはFacebookよりも多くのユーザーを獲得していると推測されていた。これに関してはどうやら今現在は違うようだが(前回の記事以来Facebookのユーザー数は驚異的に成長している)、myYearbook側も 前年比成長率384%という大変優秀な成長を記録している。 [...]
3:30 am
Teen Social Network myYearbook Gets $13 Million | The Latest Business Opportuinty Buzz said:
[...] Still, myYearbook continues to produce impressive stats if you look at Hitwise, with 384% in year-over-year growth. [...]
4:04 am
Teen Social Network myYearbook Gets $13 Million | Trinitude Network said:
[...] Still, myYearbook continues to produce impressive stats if you look at Hitwise, with 384% in year-over-year growth. [...]
4:10 am
MyYearBook is growing in US teen market, raises million said:
[...] the site may have more high school users than Facebook. According to Hitwise, the site enjoyed a 384% year-to-year [...]
9:24 am
Simply Gadgets » Blog Archive » Teen Social Network myYearbook Gets $13 Million said:
[...] Still, myYearbook continues to produce impressive stats if you look at Hitwise, with 384% in year-over-year growth. [...]