Company name: Go2
Where it's based: Boston
When it was founded: 1999
What year it was a Fierce 15: 2006
Website: www.go2.com

Why it was a Fierce 15: Mobile directory service provider go2 was a survivor of the dot-com bust, and enjoyed placement on the decks of all major U.S. carriers for directory services. In 2005 it claimed more than 24.2 million unique user sessions. Click here for more.

What has happened since it was awarded the Fierce 15: Go2 Media merged with 80108 Media in 2007 to integrate local content offerings with new mobile publishing technology and a network of local writers and guides across the U.S. The company said it has partnerships with U.S. carriers and top publishers, and allows mobile brands to leverage its advertising platform and content. Go2 said its product remains free and that it generates revenue from advertising. Go2 said it topped 3 million monthly visitors, and plans to integrate its entertainment product with social communities and to develop larger media partnerships.