When comparing SpiderOak vs Sync, the Slant community recommends Sync for most people. In the question“What are the best cloud storage services?” Sync is ranked 4th while SpiderOak is ranked 10th. The most important reason people chose Sync is:
250% more space than Dropbox basic plan.
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 5GB of free storage
250% more space than Dropbox basic plan.
Pro Privacy conscious
Terms and conditions favor user privacy.
Pro Encryption
Data is fully encrypted on the client-side, both in-transit and at-rest.
Pro Two-factor authentication
Even free accounts offer 2FA.