GrandCentral provides users with a single phone number that can access all their numbers, such as mobile, home, and work numbers.

The basic idea around GrandCentral is one phone number for all your phones, for life. As we change jobs, homes and cell phones, there are a lot of phone numbers to keep track of, and keeping everyone up to date with your most recent phone numbers is a real cost. If you use GrandCentral you can give out a single phone number. What happens when a person calls that number depends on his/her relationship to you, and what you are doing at the time.

GrandCentral rebranded to Google Voice after its acquisition by Google.

Founders:  Craig Walker, Vincent Paquet