How Is Signal Profitable? Posted by mason96 on Tuesday November 01, 2022 @09:12AM from the twitter.com dept. https://twitter.com/signalapp/status/1587112550419861507 ( 2 comments | 2 points | on HN )
They are funded by a long-term, zero interest note from WhatsApp co-founder Brian Acton.
Pretty much all contributions, so i guess: https://www.signal.org/donate/