| Rank | Name | Domain | Jun-08 | May-08 | Jun-07 | Growth |
| 1 | www.facebook.com | 45.29% | 42.88% | 15.75% | 172% | |
| 2 | Bebo | www.bebo.com | 25.04% | 26.82% | 33.50% | -20% |
| 3 | MySpace | www.myspace.com | 14.75% | 15.28% | 29.37% | -48% |
| 4 | Windows Live Spaces | spaces.live.com | 1.59% | 1.49% | 82.00% | -98% |
| 5 | Friends Reunited UK | www.friendsreunited.co.uk | 1.55% | 1.44% | 2.64% | -45% |
| Source: Hitwise | ||||||