Signal Foundation

This article is about the charitable foundation. For the software, see Signal (messaging app). For the protocol used by Signal, see Signal Protocol.

Signal Foundation

Signal Technology Foundation
Predecessor	Open Whisper Systems
Formation	January 10, 2018 (2018-01-10)
Founded	January 10, 2018 (2018-01-10)
Founders	Moxie Marlinspike Brian Acton
Type	501(c)(3) nonprofit organization
Tax ID no.	82-4506840
Headquarters	650 Castro Street, Suite 120-223
Location	Mountain View, California
Region served	Global
Products	Signal Messenger
Key people	Brian Acton (Executive Chairman) Meredith Whittaker (President)
Subsidiaries	Signal Messenger LLC
Revenue	$29,413,537 (2024)
Expenses	$38,019,696 (2024)
Staff	36 (2020)
Website	signalfoundation.org

Preview warning: Page using Template:Infobox organization with deprecated parameter subsid. Replace with subsidiaries.

Preview warning: Page using Template:Infobox organization with deprecated parameter focus. It should be removed.

The Signal Technology Foundation, commonly known as the Signal Foundation, is an American non-profit organization founded in 2018 by Moxie Marlinspike and Brian Acton. Its mission is to "protect free expression and enable secure global communication through open source privacy technology." Its subsidiary, Signal Messenger LLC, is responsible for the development of the Signal messaging app and the Signal Protocol.