Four times voted as Most Outstanding Search Engine, Google is an undisputed market leader of search engine industry. Google is a crawler based search engine, which is known for providing both comprehensive coverage of web page and most relevant information. It attracts the largest number of searches and the number goes upto 250 million searches everyday.

Yahoo! is the second largest player in the industry with 32% of market share. Yahoo! started as a human based directory but turned into Crawler based search engine in 2002. Till early 2004, it was powered by Google but after that they started to use their own technology.

Overture stands next to Google in terms of number of searches per day. It is owned by yahoo and attracts more than 167 million searches per day. Overture was the first search engine who came up with PPC program. AskJeeves initially gained fame in 1998 and 1999 as being the "natural language" search engine that let you search by asking questions and responded with what seemed to be the right answer to everything. When launched, it was run by around 100 editors who monitored search logs. Today, however, AskJeeves depends on crawler-based technology to provide results to its users.