When comparing OwnCloud vs SpiderOak, the Slant community recommends SpiderOak for most people. In the question“What are the best cloud storage services?” SpiderOak is ranked 10th while OwnCloud is ranked 11th. 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 Open source software
Pro Allows selective sync
Desktop clients offer sync almost as versatile as dropbox.
Pro You have full control with your data
Only chose a provider or host it on your soho-server.
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
Cons
Con Not plug and play as Dropbox etc
You may need some help installing it on your web space, though some providers offer free install server.
