GoDaddy is an Internet domain registrar and web hosting company that offers e-business related software and services as well.
The GoDaddy logo consists of “The Go Daddy Guy”, featuring a man with a pair of green sunglasses, orange wavy hair and a star on the head, and the GoDaddy logotype beside the man. The logotype was designed using a font named Good Dog Plain designed by Ethan Paul Dunham. The font is a commercial one and you can view more details about it here.
Update: On April 10, 2016, GoDaddy made a major overhaul of its logo since its inception in 1997. While the icon remained almost the same, the font for the logotype became Boing Bold, which is a bold and somewhat rounded sans serif created by British font designer Henrik Kubel.
GoDaddy Logo since 2016
Download GoDaddy Font
We are currently unable to find a free alternative or a font similar to the commercial font identified above, and you will need to follow the relevant links above and purchase the font.