Greenthink was a group of underground hip hop musicians and rappers.
The group originally consisted of rappers Doseone and Why?. Other artists contributed to varying degrees, including Sole, Alias, Slug, Mr. Dibbs, Jel, Odd Nosdam, Boom Bip, Illogic, Josiah Wolf, Circus, Lionesque and Kris Brown.
Greenthink released two albums. After releasing their last album Blindfold, they were joined by Odd Nosdam to form Clouddead.