In 2007, searches at the five major core search engines increased 15% to 9.6 bln searches, according to comScore. Google Sites led with 5.6 bln searches in December 2007, up more than 30% from 2006. Yahoo! Sites ranked second with 2.2 bln searches, followed by Microsoft Sites (940 mln), Time Warner Network (442 mln), and Ask Network (415 mln).
| Search engine | December 2006 | December 2007 | Growth, YTY |
| Total | 8,348 | 9,636 | 15% |
| 4,317 | 5,629 | 30% | |
| Yahoo! | 2,300 | 2,211 | -4% |
| Microsoft | 871 | 940 | 8% |
| Time Warner Network | 465 | 442 | -5% |
| Ask Network | 396 | 415 | 5% |