The servers are in the US, so it’s not really a good choice for doing things the US does not like, but they have a way better track record than protonmail and I don’t remember anything anticommunist about them.

https://riseup.net/en/about-us

"We do this by providing communication and computer resources to allies engaged in struggles against capitalism and other forms of oppression.

We value, support, and engage in struggles for human liberation, the ethical treatment of animals, and ecological sustainability. We join in the fight for freedom and the self-determination of all oppressed groups. We oppose all forms of prejudice, authoritarianism, and vanguardism."

Their whole staff are named after bird species.