[InternetOfStuff]

There's also mailbox.org

While their offerings differ in the details, by and large they offer the same thigns as fastmail.

[msh]

Unfortunately they have stopped accepting credit cards. They now only take bitcoin and bank transfer (and cash by mail and some other non international stuff)

[newscracker]

That's a bummer. I checked now and found that it does accept PayPal and a couple of other options (where it may be possible to use a credit card without having an account), but those come with additional privacy issues.