It is sustained by grants and donations, although I'm not clear how near or far it is from being indefinitely sustainable. The Signal foundation was establishe

It is sustained by grants and donations, although I'm not clear how near or far it is from being indefinitely sustainable. The Signal foundation was established in 2018 with $105 million from WhatsApp co-founder Brian Acton, and it actively solicits donations. I give $20 a month. They released a blog post at the end of 2023 emphasizing the need for donations and estimating operating costs would cross $50m/year in 2025. https://en.m.wikipedia.org/wiki/Signal_Foundation https://en.m.wikipedia.org/wiki/Signal_Foundation https://signal.org/blog/signal-is-expensive/ https://signal.org/blog/signal-is-expensive/