[jasonsync]

https://www.Sync.com (full disclosure, I work there).

[pathsjs]

Unfortunately, it is only partially cross platform (no Linux client) :-(

[LordDragonfang]

Sync to a compatible VM or server and then set up rsync?

[pathsjs]

That could be doable, but requires setting up an always available server in my home and installing Windows on that - not exactly the best of ergonomics

[jimbo366]

Does it support differential sync? It's the only reason why I'm still using Dropbox.

[shreyshrey]

For majority of the users delta sync doesn’t bring much benefits . See here https://www.getfilecloud.com/blog/2017/03/myths-and-facts-ab...

Most of the modern files like office documents and pdfs are compressed. Delta Sync only will help in scenarios if you have bitmaps and vm disks.

[jasonsync]

The Sync apps provide end-to-end encryption, so the entire file is uploaded when it changes. Agreed differential sync can be a good thing, especially with super large files that change often.