I’m also looking to migrate off CrashPlan. ( sad really )
I’m comparing UrBackup and Duplicati as my solutions for family backup. I see number of other posts here in a similar predicament.
I find that Duplicati is a little fiddly t use and I would be concerned about user error, also a file restore seems to take a very long time depending on what volume of database files needs to be downloaded.
I think UrBackup is very promising. I agree with other posters here tht it does need a client side PKI based encryption option. I would gladly sacrifice server disk space and deduplication of backed up data in favour of files being encrypted using a GPG or other PKI encryption key. For me this is a must-have feature.