SyncThing seems like a safer bet (better community, proper OSS, etc). :)
Some previous discussions:
* "Syncthing: Open Source Dropbox and BitTorrent Sync Replacement" https://news.ycombinator.com/item?id=7734114 (7 years ago|184 comments)
* "Syncthing is everything I used to love about computers" https://news.ycombinator.com/item?id=23537243 (1 year ago|159 comments)
* "Syncthing: Syncing All the Things" https://news.ycombinator.com/item?id=27929194 (3 months ago|172 comments)
For real transfer with big (> 500TB) Aspera will deliver what it says over WAN (over the Atlantic).
If you have better connections and not so much data syncthing will probably work if you can have someone manually take care of all exceptions.[2]
If you know your data and you can build quite a lot of stuff yourself you can get almost the same speed as Aspera with UDT.
There is also a go implementation of UDTs used by kcptun[3] but I haven't tried that.
1 https://github.com/syncthing/syncthing
2 I don't intend to disrespect syncthing here, but when your dealing with TB scale 24/7 things are never really up all the time, the network is unreliable, the sender host filesystem is corrupt and the receiver host filesystem is full or broken or ...
Syncthing solves a large part of syncing data between devices using your own VPS, server(s), etc. If your VPS provider goes out of business, you can then just fire up a new VPS and hook it back up to your local machine(s).
* Hugo, a static site generator: https://gohugo.io
* Gogs, a git service: https://gogs.io
* Syncthing: https://github.com/syncthing/syncthing
* CockroachDB, a scalable SQL database: https://www.cockroachlabs.com/