Tuta and Proton's political circumstances are very different from Autistici/Inventati's.
https://theintercept.com/2025/01/28/proton-mail-andy-yen-trump-republicans/
https://cyberinsider.com/tuta-refutes-allegations-of-it-being-a-front-for-spy-agencies/
Maybe they're politically-neutral or maybe one or both are sabotaged somehow, but either way, they aren't explicitly anti-fascist.