Google remained the top search property with 5.6 bln core searches conducted in December 2007, representing a 58.4% share of the search market, according to comScore. Yahoo! Sites ranked second with 22.9%, followed by Microsoft Sites (9.8%), Time Warner Network (4.6%), and Ask Network (4.3%). Yahoo! Sites experienced the most significant market share increase, gaining 0.5 share points versus November 2007.
| Search engine | Nov 2007 | Dec 2007 | Growth, YTY |
| Total Search | 100.0% | 100.0% | 0.0 |
| 58.6% | 58.4% | -0.2 | |
| Yahoo! | 22.4% | 22.9% | 0.5 |
| Microsoft | 9.8% | 9.8% | 0.0 |
| Time Warner | 4.5% | 4.6% | 0.1 |
| Ask | 4.6% | 4.3% | -0.3 |