[howlett]

I've made a very similar thing: https://www.remotepassword.com

Works on both Windows and Linux but the passwords are stored online (GPG encrypted). The main idea was to be able to revoke a password if a machine has been compromised.

[ahnick]

That's an interesting idea. Kind of a simpler HashiCorp Vault service offered as a SaaS. I guess you would also be competing somewhat with any cloud provider that offers secrets management, but they are probably going to be more expensive and not as focused on this use case. The closest thing I could find to this is https://secrethub.io/, but looks like they are in private beta still.

The only downside I can really see here is clients are dependent on remotepassword.com being secure. (which is inherent in any SaaS model) For example, if remotepassword.com was compromised then all passwords could be deleted rendering downstream scripts dependent on those secrets temporarily inoperable and of course someone could start logging the password inputs on the website.