What are the alternatives to Ubuntu One? [closed]
Since canonical is shutting down Ubuntu One, what are the possible alternatives?
I currently use Ubuntu One as a backup service for my Documents folder and various other folders I deem important. Of course I have backups on an external hard drive as well, but nevertheless, I find Ubuntu One to be very useful. What I'm especially looking for is a cloud service that does not need a special folder (such as a dropbox or google drive folder); something that is able to integrate into my own file system and syncs just any folder I want to.
I am aware that this question is rather subjective, but I do guess many people who have used Ubuntu One are now in the dark.
The following is a list of the cloud services similar to Ubuntu One that work in Ubuntu (Can be installed with a .DEB file) and may provide support for the Unity Systray:
Dropbox 
Website - https://www.dropbox.com/
Starting Free Space - 2 GB
Bonus Space - 25 GB to 50 GB when used on an Smartphone
Characteristics - Sync Files/Folders between devices.
Unity SysTray Support- YES
Open Source - NO
InSync 
Website - https://www.insynchq.com/
Characteristics - Sync Files/Folders with Google Drive. Extensive Sharing properties. 15 Day Trial.
Unity SysTray Support - YES
Open Source - NO
OwnCloud 
Website - http://owncloud.org/
Characteristics - Sync Files/Folders between Devices on your "Own Cloud".
Support - http://owncloud.org/providers/
Unity SysTray Support - YES
Open Source - YES (GitHub)
SpiderOak 
Website - https://spideroak.com/
Starting Free Space - 2 GB
Characteristics - Sync Files/Folders between devices. Advanced GUI System & File History
Unity SysTray Support - YES
Open Source - NO
Wuala 
Website - http://www.wuala.com/
Starting Free Space - 0 GB Paid Only
Characteristics - Sync Files/Folders. GUI System and an easy way to manage files across devices.
Unity SysTray Support - YES
Open Source - NO
Tonido 
Website - http://www.tonido.com/
Starting Free Space - 2 GB
Characteristics - Sync Files/Folders between computers.
Unity SysTray Support - YES
Open Source - NO
TeamDrive 
Website - http://www.teamdrive.com/
Starting Free Space - 2 GB
Characteristics - Sync Files/Folders between computers. File Collaboration (Multi User Support)
Bonus Space - Up to 10 GB by inviting others.
Unity SysTray Support - YES
Open Source - NO
SeaFile 
Website - http://seafile.com/en/home/
Starting Free Space - 1 GB
Characteristics - Sync Files/Folders between computers.
Unity SysTray Support - YES
Open Source - YES (GitHub)
Syncany 
Website - http://www.syncany.org/
Starting Free Space - Depends on which cloud service you use
Characteristics - Sync Files/Folders between computers. Can use Picasa, RackSpace, Amazon, Google, Windows Share and even WebDAV as a repository. Nautilus integration. Advanced GUI. Can integrate with other Cloud Services. Very flexible.
Unity SysTray Support - YES
Open Source - YES (GitHub)
Copy (Barracuda) 
Website - https://www.copy.com/home/
Starting Free Space - 15 GB
Characteristics - Up to 5 Devices Synced, 5 GB+ for every invite, Can personalized space provided for a single user. Nautilus integration. Advanced GUI. Can integrate with other Cloud Services. Very flexible. Supports soft symlinks.
Unity SysTray Support - YES
Open Source - NO
Others that may be used (Open Source):
OwnDrive - https://owndrive.com/
- Unified Access to multiple Cloud Services
- 1 GB Free Space
SparkleShare - http://sparkleshare.org/
- Open Source (GitHub)
- Version Control & Privacy
Others that may be used (Closed Source):
Asus Web Storage - https://www.asuswebstorage.com/navigate/
- 5 GB free space
- More free space if you use ASUS Devices
SugarSync - https://www.sugarsync.com/
- 30 Day Trial
- 60 GB Starting Size (Not free)
BitTorrent Sync - http://www.bittorrent.com/sync/downloads
- Offer API to Developers
- Direct Transfer between Devices
BitCasa - https://www.bitcasa.com/
- 5 GB (Upto 20 GB via inviting others) Free Space
- Up to 3 Clients
GoAruna - http://goaruna.com/
- 2 GB Free Space
- Works on many devices
In my case I stick with Dropbox and InSync. Tried SpiderOak and there was a lack of User-Friendliness that I did not use it after a week. InSync is pretty cool (Saves me a lot of time). Lastly Syncany has pretty cool options to connect to other cloud services and even create your own for privacy.
One of my favorite services that no one is listing is BitTorrent Sync. They offer UNLIMITED transfer and storage space; it works just like Dropbox.
The ONLY downside is that it is indeed BitTorrent; one computer has to be on with the files. I just let it run on my laptop. It's multiplatform, and its incredibly sharable.
Ther's also Dropbox, which I highly recommend.