A piracy / sharing community for leftists.
I'm on my phone so it's not as simple to link to evidence, but you or someone else could search it in the meantime.
As someone else said, ProtonMail sells snake oil. Its handling of keys is not at all appropriate and they rat on activists. This means the privacy anyone may think they have with them is false.
Depends on your definition of legit : https://lemmy.ml/post/79956
And as always it depend on your needs. If you need to hide communication within a group of people, you all need to use protonmail, otherwise the mail comes out of protonmail server without more security than any other mail provider (from what I understand).
If you want to fight centralization of services, protonmail is already really big, and did not create a federated solution to their encryption method, so they are not helping. Then you should find a local, or at least small independent email provider.
If you just want to be outside of the US, protonmail is great for you.
If you are a political activist of any sort, and fear your government, then recent history showed that protonmail don't want to protect you from this kind of intrusion.
You should know they supported the HK riots.