yet it's fair to say that:
- Signal was incepted by US gov funds
- During most of it's initial conception phase it was US gov funded
- therefore some of the characteristics its users still suffer today (like reliance on strong selectors, pinky-promise of non-retaining metadata, centralized architecture based on the same "cloud" as the one of the CIA and other decisions hostile to free/libre software users and ethics) originate from that era.
https://www.gnu.org/philosophy/ is a good place to start.