Signal Foundation Signal Technology Foundation Founded January 10, 2018; 3 years ago (2018-01-10)[1] Founders Moxie Marlinspike Brian Acton Type 501(c)(3) nonprofit organization Tax ID no. 82-4506840 [2] Focus Open-source privacy technology Headquarters 650 Castro Street, Suite 120-223 [3] Location Mountain View, CA Area served Global Key people Brian Acton (Executive Chairman & CEO)[4][3] Subsidiaries Signal Messenger Revenue (2018) $609,365 [5] Staff (2020) 36 [6] Website signalfoundation.org Formerly called Open Whisper Systems