What is the best alternative to Tarsnap?
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Pro Available for many platforms
The Spideroak client is available for Linux, MacOS, Windows, Android and iOS.

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
You set it up once and from then it runs in the background whenever you are not using your computers (or at specified times).
Pro Supports multiple backup destinations
You can set up different files/folders to back up to specific places.
Pro Differential and incremental file backup
CrashPlan updates only that part of the file that has changed, saving bandwidth and time.
Con Heavy client
The BackupClient is based on Java and therefore a lot more memory-intensive than most other backup solutions
Con Home edition discontinued
CrashPlan's home edition will be shut down on October 23, 2018. They are no longer accepting new signups or subscription renewals.
Pro No file size limits
Allows you to store your HD videos, FLAC music files, and large documents.
Pro Desktop app doesn't take space on hard disk
Computers see it as a network drive.
Pro Cross-platform
Backup and use your files from any device with Windows, Mac, Linux, Android, or iOS.
Pro No filesize of traffic restrictions
There are no limitations of file size or amount of data you can upload. The $5/mo plan gets you unlimited cloud storage.
Pro Beginner-friendly defaults
The default configuration includes everything except for system files to be backed up. That also includes external USB drives. This will work for most people. It can, of course, be customized to each person's liking.
Pro Excellent restoration performance
Backblaze creates a zip file of all your files for you to download, thus decreasing the amount of data you need to download and increasing the speed of the download since it's one connection instead of multiple that need to be opened and closed for a list of files.

Con No Linux support
There's no Linux client for Backblaze.
Con Backblaze does not support network (NAS) drives
If you use a thing like Drobo, Backblaze will not back it up.
Pro Only you know the encryption password
No privacy concerns.
Pro Reliable
Amazon services offer solutions with almost 100% durability and 99.99% availability. Even if the system loses data-centers, you will still be able to access your files.
Pro Can store data directly in a variety of cloud storage providers
Arq is client-side software that runs on your computer and talks directly to generic cloud data storage providers. No third-party service in the middle means lower costs, better reliability, lower risk of a service ceasing to operate, ease of migration to other storage targets. Amazon Glacier a...
Con Complicated setup
When it comes to ease of use most cloud backup service are pretty easy as it is just one signup, with Arc you need to download install and activate it to then register for an Amazon account, this extra step may be troublesome to some people or just annoying.
Pro Encrypted locally before sending (using GnuPG)
Data is encrypted locally before being sent, and kept encrypted by a key that is never stored on the remote machine. So you might even store your data on a public space, people would still need your key or brute force it.
Pro Bandwidth and space efficient
Duplicity uses the rsync algorithm so only the changed parts of files are sent to the archive when doing an incremental backup. For instance, if a long log file increases by just a few lines of text, a small diff will be sent to and saved in the archive. Other backup programs may save a complete co...
Pro Versioning and incremental backup
You can retrieve older versions or files you recently deleted locally even after having updated your backup.
Pro Cheap (about $0.01/GB/Month)
Same price a Google Drive, but more flexible as you pay for what you use (Google Drive you have to jump from 100 MB to 1 TB for example). Also supports larger backups.
Pro Optionally supports versioning
Versioning can be enabled at no extra cost so you may retrieve older versions or deleted files.
Pro Works with duplicity
duplicity allows to encrypt data locally using GPG and it supports Google Cloud Storage.
Pro Shared folder with Stash
Stash is a local sync folder similar in functionality to Dropbox.
Pro Prevents from social engineering attacks
Mozy end-users are not susceptible to social engineering. At Mozy, there is no one person who can authorize the deletion of a given individual’s data. Our process of cleaning and deleting a customer’s data is a very structured and automated process, and you can’t call us up and short circuit...
Con No unlimited storage plan
Every plan for Mozy has a limit on the storage meaning there is no price one can pay for piece of mind of unlimited storage.
Pro Easily scalable
There's no cap in storage or traffic. Cost is based on usage.
Pro Super cheap with a year's worth of free service
S3 storage costs $0.03 per GB and gets cheaper the more is stored, PUT, COPY, POST, or LIST requests are $0.005 per 1,000 requests and GET and all other requests are $0.004 per 10,000 requests. And with some restrictions is available for free for a year.
Pro Easy to setup with CDN
Simple to set up with Amazon's CloudFont CDN.
Con Setting up automatic public permissions is confusing
By default, S3 sets uploaded files to private. You can configure your S3 bucket to auto-apply public permissions by copying and pasting a template. But the template might be intimidating to some users.
Con Confusing web interface
Amazon S3's web interface is quite confusing, especially for first-time users, but there are many tutorials online that help beginners to set up a static site on S3.
Con No SFTP support
Amazon S3 does not have SFTP support, instead the S3 web interface has to be used.
Pro Extermely low-cost
$0.007 per gigabyte per month is comparatively cheap and allows for large amounts of cloud storage.
Con Data transfer out >1GB costs money
Retrieving a backup over 1GB costs money starting at $0.090 for 10GB.
Con Can't get to data instantly
Data retrieval can take several hours to initiate.
Pro Option for hosting the database service on the cloud server.
If you wanna host your database on the cloud server, you can have both the option as Database as a Service (Pre-installed and managed database) or Infrastructure as a Service (If you want to have root access and manually want to install the database).
Pro High uptime
All the cloud services are with 99.95% uptime.
Pro Cost-friendly
F(x) Data Cloud provides public cloud server at a cheap price. The basic plan starts at $1.99/month.
Con No GPU provided
GPU is not provided.
Pro Cross-platform desktop and mobile
Box is available for Windows, OS X, iOS, Android, BlackBerry and Windows Phones. Which mean access to ones files no matter the device or platform used.
Pro Extendable via plugins
There are plug-ins for applications that allow interactions with Box.
Con Log in on every use
Any time the app is opened the user's log-in needs to be typed in, which can become annoying. While it is a nice privacy feature, an option to turn it off would be nice.

Con No Linux client
They are not willing to listen to Linux community. They've also deleted a bunch of messages from Linux users on their forum
Con Missing collaborative apps
Not being able to easily back up office works through an integrated office suite can be a set back when comparing to backup apps like Drive. While you can set certain apps to save their files to the Box folder, it is not as easy as using something like Google Docs, which not only saves while you a...
Pro Users can order a physical copy of their data
For users in the US there is a option to receive their backup data on external media, meaning not only is there a backup in the cloud but you can order hard backups anytime.
Pro Intuitive software
Does not require deep system knowledge to operate Carbonite's software.
Pro Unlimited online storage
The $59.99/yr plan gets you unlimited cloud storage.
Con They've lost data before
There have been occasions where a paid subscriber was not ever able to get back their data.
Con No external hard drive support in the $59.99/yr plan
You need to upgrade to the HomePlus $99.99/yr plan to back up external drives.
Pro Elastic storage
Elasticity in the pricing allows for users to only pay for what they use in data, this way there is no overcharging when ones limit wasn't hit. This also allows for users to constantly change their backup usage without fear of being charged too much or having to constantly switch their plans.
Pro Backups can be performed on systems that reside on-premise or cloud
User can choose to backup to their own private cloud as well as a public cloud such as AWS. This choice allows for piece of mind as to where ones data is residing.
Pro Free 30 day trial
User have the option to test out the software with a 30 day free trial.
Pro Client-side encryption
Encryption is performed before content gets uploaded to the cloud.
Pro Cross-platform
With clients for Windows, Mac, iOS, Android, Windows Phone, and Blackberry.
Pro Free storage space (get additional space through bonuses)
5 GB, up to 16 GB with bonuses.
Con Proprietary
Because the software is proprietary, there's no way to review the security practices or really know how the software operates under the hood. As such it can be considered as not safe for sensitive information.
Pro Collaboration via Office 365
If you use Office 365 with OneDrive, you can share a file to edit collaboratively in real time.
Pro Microsoft Office integration
It integrates with Word, Excel, PowerPoint, etc as if you were using OneDrive locally.
Pro Full integration in Windows 10
Once setup OneDrive folder and local folders can be the same slowing for seamlessly integration into Windows OS.
Con Strictest code of conduct
Terms of Service forbid any kind of nudity, or that incites, advocates, or expresses pornography or racism among other things.
Con Becomes slower when it picks up a "Linux" user-agent
This may be intentional by Microsoft to force OneDrive users to use Windows. When OneDrive picks up a "Linux" user-agent it becomes slow whereas when from the same computer and browser it picks up a "Windows" user-agent it becomes considerably faster.
Pro 50GB free
There's also three upgrade plans, starting at 500GB and $110/yr.
Pro Cross platform
Linux, Windows and Mac.
Pro Client-side encryption
All files uploaded to Mega are first encrypted on the users side. To access files a decryption key must be supplied. For ease of use, the decryption key can be appended to the URL you share.
Con Higher than normal chance of a forced service shutdown
Mega has a higher than normal chance of having legal troubles due its founders past, thus there's a higher than normal chance that the service may be shut down with all your files in it and no way to retrieve them.
Con No account recovery
The only way to access your account is with a password and there is no way to recover it if you lose it.
Pro 15GB free
This space is shared across Drive, Gmail & Picasa.
Pro File sharing & collaborative editing
Google account holders and non-holders can be set to access and/or collaborate on files/folders in real-time. Additionally, you can find files you've shared not only by filename but by person you've shared the files with.
Pro Integrates with other Google services
For example, you can use search to search through both Drive and Gmail.
Con No official client for Linux
Google as of yet has a client for Linux, leaving many who use the service forced to use third party apps or the webpage.
Con Data privacy not guaranteed
Data privacy is widely known as one of Google's weaknesses. Data shared through Google is most likely matched up with the user's profile inside other Alphabet inc. subsidiaries, and, due to the business model, used commercially.
Pro Easy to use
You can use Dropbox via website, by installing a desktop client that creates a folder that you simply drag and drop files into, or with their mobile app. Everything synchronizes across all devices used and cloud storage. And Dropbox offers easy methods of sharing whatever is within it.
Pro Allows sharing a single file via link
Whether using desktop client or web interface, simply right click on the file you want to share and select Dropbox > Share link, then send the link to the people you want to share the file with. The recipient does not require a Dropbox account.
Pro Cross-platform desktop and mobile
Dropbox is available on iOS, Android, BlackBerry, Windows, OS X and Linux. By having a client for so many OS's pretty much anyone is covered no matter what kind of device or OS they are using.

Con Not secure
They don't apply end-to-end encryption, files are visible to admins, governments, etc..
Con Too little free space
There is just too little of free space available comparing to the competition.
Con All-or-nothing (non-selective) upload
Uploading generated contents (cache, compiled code, etc.) is prone to conflicts, wastes bandwidth and free space.
Pro Synchronisation and backup services
iCloud syncs a users settings and files across a range of Apple hardware making for a simple solution to backup and sync data across ones Apple devices.
Pro Documents in the Cloud
Integrates different office tools such as Keynote or Pages for writing and presentations, etc with iCloud.
Con Certain file restrictions
Does not allow uploading certain file types.
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