Deduplicated, compressed, encrypted backup with unlimited versions.

Secure, reliable backup to protect your most important files from data loss and ransomware.

Sync your data across all of your devices. Access all of your historical versions and deleted files with no time limits or restrictions. We offer unparalleled privacy for you and your data.

The SpiderOak One Backup desktop application is available for Linux, macOS, and Windows operating systems; mobile app available for Android and iOS.

150 GB Plan: $6 Per Month or $69 annually, Unlimited Devices

400 GB Plan: $11 Per Month or $115 annually, Unlimited Devices

2 TB Plan: $14 Per Month or $149 annually, Unlimited Devices

Syncthing replaces proprietary sync and cloud services with something open, trustworthy and decentralized. Your data is your data alone and you deserve to choose where it is stored, if it is shared with some third party and how it's transmitted over the Internet.

I have been looking for a good way to back up my files, without much luck. My requirements are:

Encrypted (on the original machine).
Fast/bandwidth-efficient (deduplication is a plus).
Open-source.
Cheap.

Every single piece of software I have ever tried fails in at least one of the above. I currently use SpiderOak, which is everything except open-source, so that fails too.

However, my quest is finally over. I have discovered the Holy Grail of backups, and its name is Attic.
UPDATE: I have now switched over to Borg, which is a fork of Attic that seems better-maintained. This article still mostly applies to Borg, though.

BorgBackup (short: Borg) gives you:

Space efficient storage of backups.
Secure, authenticated encryption.
Compression: LZ4, zlib, LZMA, zstd (since borg 1.1.4).
Mountable backups with FUSE.
Easy installation on multiple platforms: Linux, macOS, BSD, ...
Free software (BSD license).
Backed by a large and active open source community.

Attic and borg are "deduplicating backup program(s)" that can create and maintain remote backups over SSH.

Over the course of 2014 and 2015, attic and borg have become the de facto standard for efficient, secure, remote backups.

They both provide:

• source data encrypted on the source with no keys or access given to the remote receiver
• fast, bandwidth efficient and deduplicating
• fully open source
• active, current development

In short: attic and borg are the rsync tools of the cloud generation

We built our own cloud platform - we are not reselling another cloud like Amazon or Google.

We give you a real, live UNIX filesystem running on our 99.9999% resilient ZFS platform.

You may access the account with any tool that runs over SSH. Tools like attic and borg.

We have a world class network with locations in three US cities as well as Zurich and Hong Kong.

Special "attic accounts" are available at a very deep discount for technically proficient UNIX engineers.

• filesystem snapshots are disabled since you'll be doing versioning and retention with attic or borg.

There is NO attic/borg specific technical support or integration engineering. You're here because you're an expert.

    2 cents per GB/month - 40 GB minimum, paid annually - Click here for that rate and plan

    No other costs. No contracts. All transfer/bandwidth/usage is free.

As of the Summer of 2012, the rsync.net storage platform is based on ZFS. We utilize raidz-3 (a raid array that can withstand 3 failed disks, as opposed to raid-6 that can withstand only 2 failed disks) with conservatively sized (12 disk) vdevs. We also create zpools with 4 or fewer vdevs.

Our ZFS platform uses the very best practices (IT, or "disk only" firmware on our host bus adaptors and only ECC RAM) as well as very conservative (overkill, really) disk replacement and scrub schedules.

All power is conditioned and backed by battery banks which are backed by diesel generators. Physical machines are connected to at least two distinct power circuits.