When comparing SpiderOak vs Koofr, the Slant community recommends SpiderOak for most people. In the question“What are the best cloud storage services?” SpiderOak is ranked 10th while Koofr is ranked 27th. The most important reason people chose SpiderOak is:
Thus you have a single service for all of the things.
Specs
Ranked in these QuestionsQuestion Ranking
Pros
Pro Combines cloud syncing, storage service and backup client
Thus you have a single service for all of the things.

Pro Available for many platforms
The Spideroak client is available for Linux, MacOS, Windows, Android and iOS.
Pro Incrementals
SpiderOak updates only that part of the file that has changed, saving bandwidth and time.

Pro Zero knowledge
Data is locally encrypted before uploading to Spideroak. They cannot recover your data even if they wanted to since it is stored in encrypted state on their servers.
Pro Unintrusive
Pro Multiple connections
Can connect multiple accounts from the same provider.
Cons
Con Reauthorization issues
If you are using reauthorize,it will cause error : Access to this external account is currently not possible due to expired token.
To fix it, you need to remove them first, then connect them like new users does
Con Limited free user experience
Won't show conncted drives in desktop application to free users.
Only able to connect to OneDrive, Google Drive and Dropbox.
