Tuta is in Germany, part of the 14 Eyes, which share intelligence with the US. If you are an American engaged in activism under the current administration, do not use Tuta. They are absolutely obligated to comply with sealed warrants for your data, and nobody there is going to put their livelihood or freedom on the line for you, nor should they be expected to.

Yeah I was considering this service. There are a few things that make me hesitant, like searchability of emails and possibly calendar features and integration. But this one is definitely at the top of my list.

Don't use PGP.

https://www.latacora.com/blog/2019/07/16/the-pgp-problem/

Also read "Why does Tuta Mail not use PGP?" here: https://tuta.com/encryption