Updated May 31, 2014

Bottom line

SpiderOak offers superior privacy and security protection for cloud storage users. The company's entire business model is based on ensuring users have the peace of mind that their files and data are secure. SpiderOak also offers syncing between devices, file backup and 2 GB of free storage, but it's primarily a security-focused cloud storage service without many bells and whistles.

Ease of use

When privacy is the priority. Thanks to its strong encryption and privacy policies, SpiderOak garners positive reviews for security and privacy, particularly in the wake of the National Security Agency spying scandal. Early on, SpiderOak's sign-up process involved jumping through a lot of hoops in the name of privacy. Today, sign-up resembles that of other services -- you'll register with an email address and credit card if you plan to use more than the 2 GB of free storage; after downloading, you'll create a user name and password (SpiderOak employees won't ever have access to it or any other of your data). The program works with Windows, Mac OS X and Linux systems as well as iOS and Android devices, but its software can't be accessed via a browser. Some reviewers say uploads can be slower than other services'.

ProsStrong privacy and security measures, Easy syncing, Works with Mac, PC, LinuxConsNo editing features