In theory you could also use yacy... But that is intended as search engine and not as archive.
Edit: while looking into it I found alternatives [2] and Memex [3] seems to be interesting.
Edit2: I remember 2 Show HNs. One recorded your entire desktop and made it searchable. Can't remember what that was called, but the AllSeingEye I found [4]
[2] https://docs.archivebox.io/en/latest/Web-Archiving-Community...
I currently use Memex, but this is different approach, and I keep looking for a polished experience that can get more mainstream users into archiving/offline browsing.
Looks like I got some research for this week
Also, I don't want to do it if I have to change the way I use the protocol so I would want the same methods to be pretty much available and to work the same way.