I'd have to go against Tuta, as they've been called out numerous times for posting outright lies about their competition on social media. They fabricated a chainmail-style "announcement" from Google announcing a Gmail shutdown date, saying that you should move to Tuta mail. I called them out on this, and they deleted the post shortly after, saying that they "didn't fact-check the lead that was sent to them", even though their post was the earliest existing copy of that fake announcement I could find, suggesting that they created the fake document, themselves.

If they're willing to lie about something so banal, they're willing to lie about something important. I don't trust them, and I certainly won't give them my money.