I already use a password manager (bitwarden) which has has a account recovery using an emergency contact. I use my password manager sharing feature as sending document by email is less secure, document is retained by all email and cache server, while PM (password manager) keep the document e2e encrypted with an expiration date. Proton support emergency access, not sure the rest. Some thought: Not everyone has a password manager, but those that do might not require this tool. If your product is mostly for emergency access once invalid, how do you sell a yearly subscription ?