The German branch of Seafile: https://seafile.de/en/products/

I switched all my data (about 250Gb) to them from Dropbox a couple of months ago and it has worked out well enough.

Features:

- servers not based in the US

- encryption

- privacy

- open source (thanks lima)

- multiple libraries (like multiple separate Dropbox folders)

- nice file manager for unsynced (parts of) libraries

- price

- payment options (Bitcoin)

- supports more OSes

- one can run one's own server

Cons vs Dropbox:

- syncing problems not always obvious

- some UX issues

- photo support

- selective sync cumbersome (if not using libraries)

- no LAN sync

And Seafile is open source, too.

I use Syncthing: https://syncthing.net/

Totally distributed, works like magic. Being distributed means you do have to blindly trust a third party, but also that don't have to worry about $ per megabite. For example, one of the machines I have in my Syncthing network is a Raspberry Pi with a 3TB drive getting a backup of my laptop $HOME and important stuff from other machines all the time.

Is it a Pi 1? I tried for months to get it to work with it, but even overclocked, it was still too damn slow to function.

I love Syncthing, though, but I had to take the Pi out of the pool.

Yeah, admittedly I also tried with a Pi 1 but it was too slow, now I have a Pi 3 for that.

Spideroak, if your reason for switching is privacy.

I use (and pay for) Spideroak pretty much for that reason but given that their client is not open source I kinda feel like it's just homeopathic security. They could backdoor my client and I wouldn't know better.

So I definitely wouldn't store very sensitive stuff on SpiderOak either but I guess it's slightly better than dropbox.

OwnCloud https://owncloud.org

Has anyone tried sync.com? From their website they claim end to end encryption and seem to take privacy ands security seriously.

As long as the client is proprietary, how can one know that they are any better than Dropbox?

Feature-wise sync.com looks interesting, but there seem to be very few users out there. I would be worried that they disappear when they run out of VC money.