...or Owncloud [1], or Nextcloud [2], or Syncthing [3], or Seafile [4], all of them free software, none of them needing 'future discounts' like the Duple site promises to 'beta testers' since they are free software.

[1] https://owncloud.org/

[2] https://nextcloud.org/

[3] https://syncthing.net/

[4] https://www.seafile.com/

It actually looks very cool, I'm going to try it.

What would be the business model?

How does it protect your data if your house burns down?

If that is really something to worry about you can just copy stuff off and drop the copy off at a relatives house. These days you can get 1-2TB 2.5" drives for cheap. Off site storage has become reasonably convenient even if you are moving physical objects around.

Dropbox isn't a backup anyways. Have an offsite backup that is encrypted. Could be the cloud, could be a hard drive you keep at your parents' house.

Not how does it, how do you. You should spread the data to an offsite or secondary location.

So, a backup solution where part of the instructions is..."another backup solution"

Come on.

Uh, yeah? A common rule in IT is 3-2-1 backups.

3 copies

2 different devices or medias

1 offsite

If your data isn't that important, then don't.

https://www.us-cert.gov/sites/default/files/publications/dat...

A) Cloud backup solutions already abstract away replicating multiple copies for redundancy.

Unless Google/Dropbox/Amazon/Microsoft go out of business, you are not likely to lose data from your backup via act of god (aka data center fire)

B) The simple interface of web solutions is still ultimately that if you want redundancy, just pick 2 (or 3) different providers. Myself - I use Google Drive for backup of my most core files, and Backblaze for the whole shabang.

Right, so you have as part of your backup solution "another backup solution"

My point is backup that's not Offsite is not backup at all.

Defense in depth applies to reliability of backups as well as security :P

There is this practice called "backing up".

If you try it, you might find you can protect your data more easily than you can protect most other things in your house if it burns down.

"E2EE coming soon"