Bluepulse

Company name: Bluepulse
Where it's based: San Mateo, Calif.
When it was founded: 2006
Year it was a Fierce 15: 2008
Website: www.bluepulse.com

Why it was a Fierce 15: Bluepulse tried to create a unified mailbox as an application. The company claimed that its application worked on more than 1 billion mobile phones, and was focused on helping friends communicate with each other better--unlike other mobile social networks that helped users discover new people to chat with on the mobile Web. Click here for more.

What has happened since it was awarded the Fierce 15: Bluepulse did not respond to multiple requests for an update. Based on an Internet redirect from www.Bluepulse.com, the company appears to have dropped its previous business plan in favor of an iPhone app called "aphoot," which the company describes as a "mobile butler" that can do things like provide driving directions.