I used changelly recently to buy hive
The link to my post explains more but basically bank account to coin base, buy btc, and then use changelly to convert and transfer to my hive account.
I did look at simple swap, and while I was able to go from btc to hive, it didn't seem to let me go the other way (and while I don't plan to sell anytime soon, I need to know there is an option for an off-ramp... changelly would allow me to do that)
Changelly also has a bonus in no KYC, literally just asks for an email address :-)