Google accounted for 65.98% of all US searches in the four weeks ending December 29, 2007. Yahoo! Search, MSN Search and Ask.com each received 20.88, 7.04 and 4.14% respectively. The remaining 49% search engines in the Hitwise Search Engine Analysis Tool accounted for 1.71% of U.S. searches.
| Engine | Dec.-07 | Nov.-07 | Dec.-06 |
| 65.98% | 65.10% | 63.15% | |
| Yahoo! | 20.88% | 21.21% | 21.62% |
| MSN | 7.04% | 7.09% | 9.80% |
| Ask | 4.14% | 4.63% | 3.72% |
Source: Hitwise