[cllu]

One thing I cannot understand is that Dropbox API does not provide any kind of hash for files (in both v1 and v2). In contrast, Amazon Cloud Drive and Google Drive provides md5 hash, and OneDrive provides sha1Hash and crc32Hash. The lack of hash info makes custom app to compare and upload local files extremely painful.

[dmix]

Git annex [1] is a far more capable solution for file syncing and remote backups. It comes with a built-in assistant which syncs directories making it an adequate Dropbox replacement.

Git annex automatically uses SHA256 on all files as the UUID (optionally set SHA512 in .gitattributes). You can PGP sign your git commits to add more verification.

Plus you dont have to trust a 3rd party with your data, as it can sync entirely over local networks via SSH, directly to a USB harddrive, and it supports encryption when using S3 or other cloud storage.

I managed to teach my non-technical girlfriend how to use it without much effort but getting business people to use it might be a hurdle.

[1] https://git-annex.branchable.com/