CrashPlan

It runs continuously in the background to ensure that the files selected are backed up.
The Crashplan client automatically backs up to ensure that customers are using the very latest client and are not in danger of security leaks.

The Crashplan client is cross-platform and will run on Linux and Mac

Code42 appears to have removed their plan for standard household users and now only has plans for small and large businesses. Unfortunate for the average household computer user.

When I used Crashplan for backup in Beijing, China, the upload speeds were horrendously slow. I assume this was not the fault of Crashplan, but the result of serious Internet throttling by the internet provider or by state security apparatus in China where all connections to the outside world are severely curtailed. Backing up 200gb of data took nearly half a year. But my experience was likely unusual.

Based on other user reports of Crashplan, the upload and download speeds are quite good.

Flexibility, reliability, ease of use, configuration options. Unlimited storage, file modification history. Local backup and peer to peer options.

Withdrawal of home user option, which I understand given the economics of providing unlimited storage.

We needed to find a replacement for an online backup software package that was no longer working reliably for our company. CrashPlan was easy to install and was up and running within an hour. The initial load of our data took many hours, but that is to be expected.

The reporting options are actually a bit more complex than what I need. Reports can be set up for several users, but we only have one user.

Over 10 years ago, CrashPlan Pro came recommended by an IT friend. I've been using since then.

Overall, the ease of use for the end user is nice. However, the admin portal and all the intricate settings takes some time to get used to as well as tweaking of the settings.