Signal Foundation
The non-profit foundation that owns the Signal messenger — founded 2018 with a $50M donation from WhatsApp co-founder Brian Acton.
President: Meredith Whittaker (ex-Google, AI ethics activist) since 2022. Operating costs ~$40M/year (2024 filing). Funding: donations + Acton's initial gift. The Signal Protocol is licensed for free to WhatsApp, Facebook Messenger, Skype, etc. The foundation takes no government money (crucial for credibility).