Mark Spencer

Who is Mark Spencer?

Mark Spencer is an American computer engineer and is the original author of the GTK+-based instant messaging client Gaim, the L2TP daemon l2tpd and the Cheops Network User Interface.

Mark Spencer is also the creator of Asterisk, a Linux-based open-sourced PBX in software. He is the founder, chairman and CTO of Digium, an open-source telecommunications supplier most notable for its development and sponsorship of Asterisk. Spencer shifted from CEO to Chairman and CTO in early 2007.

While attending Auburn University, Spencer co-oped at Adtran when he wrote l2tpd. He went on to start a Linux technical support business. Spencer did not have enough money to buy a PBX for his company so he decided to write Asterisk and later founded Digium.