What I like about Proton Pass is the aliases for your email, they are one of the neatest features I have seen in the last time, even firefox now has that feature
Like as in beer? No. Or free as in freedom? Also no.
However, iCloud will give you a large amount of the feature set for a fraction of the price (starts at $0.99/mo) and will likely give privacy not too far from what Proton gives you.
In the end, there’s always a risk with putting any information on the web.
it's an email generated by a service like Firefox Relay, Proton Pass or Simple Login, etc, connected to your email (only on the receiving part) used as a way to hide and protect your actual email from spam when registering to anything. That way, this alias email redirects incoming mail to your real email, and when you receive spam, or something you don't want in your Inbox, you just deactivate that alias.