Wireless - Seattle, Washington, United States
Mr. Number develops apps for smartphones that let consumers control who can call or text them and when. More than four million people use Mr. Number to let friends know when they are free to talk and when they are busy; to block calls and texts from people that they don't want to hear from again; and to find out who is calling when they don't recognize a number in the first place. Backed by Menlo Ventures, Mr. Number was founded by Jason Devitt and Mike Wells and is based in Palo Alto, CA.