Pros / The backup and restore speeds are very fast.

Cons / The overall value of the subscription plan is very low.

 Verdict / SOS Online Backup performed very well in our tests, but the cost is very high to back up 1TB of data.

Infrascale's SOS Online Backup is all about protecting your data and keeping your files private, which is why it's one of the most secure cloud backup services available. While the upload and download speeds in our PC tests were above average, the performance on a Mac was exceptional. The big downside, however, is the enormous cost.

For our review of cloud backup services for Macs, we evaluated the cost of each service at three levels: an individual with 1TB of storage, a small family with three computers and 1TB of storage, and a large family of five computers and 1TB of storage. We also tested the backup and restore speed because this is the best indication of performance. Finally, we evaluated SOS Online Backup's ease of use from the perspective of a novice user.

SOS Online Backup's personal subscription includes five computers, regardless if you subscribe to 50GB storage or 10TB of storage. For our cost evaluation, we reviewed the 1TB plan, which costs $399.99 per year. It costs the same, whether you're an individual or a large family with five computers. This makes it one of the most expensive Mac online backup services available. By comparison, the best Mac backup service we reviewed costs $44.62 a year for the same amount of storage among the same number of computers. This cost difference is difficult to ignore, which is why SOS Online Backup received a failing grade at each level of our value analysis.

In our backup tests, SOS Online Backup received an A-, recording an average speed that suggests it could take about 3.5 days to complete a 1TB backup set. This made it one of the fastest apps in our tests. Of course, it's important to note that these speeds are relative and will differ according to your own bandwidth limitations.

Its Ease of Use for the backup process received a C-. While the app has a "Backup Now" button that allows you to initiate a backup set with one click, setting up this feature involves nine steps. On average, most Mac backup apps have three steps. Another issue is the cog symbol used for the settings. While a cog symbol is a common indication of settings, novice users aren't going to understand what it means until they've clicked on it. Overall, the app has a slightly steeper but still average learning curve.

The restore speed was also very good, receiving an A- in our tests. The relative speed suggests you could restore 1TB of storage in about five days. The Ease of Use for the download phase of the app received a C in our evaluation. The primary reason for this was the number of steps involved in the file-restoration process. We counted as many as 11 steps between choosing the files you want to restore and actually initiating a restore. While there is a learning curve, it's just average.

Data security is one of SOS Online Backup's priorities. All of your files, whether backed up from a desktop or a mobile phone, are protected with triple-layer 256-bit encryption. The first layer of encryption occurs before backing up your files. The second layer occurs while the files are in transit to or from the servers. Another layer of encryption is applied once the files are stored on the servers.

Another great security feature is the option to customize the encryption key during the first layer of encryption. This private encryption key is optional, because it comes with some responsibility on your part – if you forget the key, you can't have it reset. Still, a private encryption key means that no one can view the files except for you. This ensures privacy and security.

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With triple-layer encryption and the option to customize the encryption key, SOS Online Backup is one of the most secure Mac cloud backup services you can use. The backup and restore speeds were exceptionally fast in our tests. However, the service has a very high cost for 1TB of storage at each level of users we reviewed, and the overall Ease of Use was just average.

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Specifications and Benchmarks

Price & Value

Value for Large Family (1TB +5 Users)
Value for Small Family (1TB +3 Users)
Value for Individual (1TB + 1 Users)
Computers per Subscription
Yearly Subscription Cost

File Restoration

Ease of Use
Unlimited File Versioning
In-Place Restore
External Drive Restore
Courier Recovery

File Backup

Ease of Use
Continuous Backup
Mirror Image Backup
Drive Seeding
Local Backup
Device Syncing


256-bit AES
SSL Transfer Encryption
Personal Encryption Key
Two-Step Verification
Servers Owned & Maintained

Help & Support

Live Chat