However Proton is promoting it as a non-custodial wallet. I think every bitcoin knowledgeable person can say it’s not. That makes me doubt the company’s ethics.
I just listened to nostr:npub10qrssqjsydd38j8mv7h27dq0ynpns3djgu88mhr7cr2qcqrgyezspkxqj8
with nostr:npub1cj8znuztfqkvq89pl8hceph0svvvqk0qay6nydgk9uyq7fhpfsgsqwrz4u and Andy Yen. I also thought nostr:npub18s4zkd0wjq5gkthz4paw2704ty4s354wcp2krvxy0sewz3g9z2cs73ydrt came out of nowhere, but listening to the story of how Proton got blocked by PayPal back in 2014 and they used Bitcoin to fix this issue, it all made sense
Discussion
From what I've seen on nostr:npub1rxysxnjkhrmqd3ey73dp9n5y5yvyzcs64acc9g0k2epcpwwyya4spvhnp8 video about the wallet, it is non-custodial. You can get your seed phrase on it. And it's also open source, so you can check it by yourself
I did, and the only thing you need to regenerate the wallet on another device is your proton login (email and pass). So they are holding the key somehow.