Comparison of online backup services

This is a comparison of online backup services.

Online backup is a special kind of online storage service; however, various products that are designed for file storage may not have features or characteristics that others designed for backup have. Online Backup usually requires a backup client program. A browser-only online storage service is usually not considered a valid online backup service.

Online folder sync services can be used for backup purposes. However, some Online Folder Sync services may not provide a safe Online Backup. If a file is accidentally locally corrupted or deleted, it depends on the versioning features of a Folder Sync service, whether this file will still be retrievable.

Comparison

Provider	Windows 1	Linux 1	Mac 1	Android 1	iOS 1	Encrypted storage	Zero knowledge 2	Secure Key Management 3 [1]	Limited MB plan 4	Unlimited MB plan 4	$/MB plan 4	Unlimited BW 16	Provider	Cloud hosted Net Drive 5	Sync 7	Autodetect changes 12	Public file hosting 8	Physical media restore 9	Server location(s) 10	Free online storage (non-trial) 13	Maximum per-file size	External hard drive support 14	Hybrid Option 15	Green Hosting	OpenSaaS
Backblaze	Yes	B2 only	Yes	Yes	Yes	Yes [2]	No [2] Company must be given passphrase (to private key) to restore any data.	No	No	Yes	No	No	Backblaze			Yes	Yes	Yes	United States,   Europe	10 GB [3]	No limit	Yes	No
Baidu Cloud	Yes	Yes	Yes	Yes	Yes	Yes [4]	No	?	No	No	Yes		Baidu		Yes	Yes	Yes		China	2000 GB	4 GB (Non-member) 10 GB (Member) 20 GB (Super Member). [5]		?
Barracuda Backup Service	Yes	Yes	Yes			Yes [6]	No	?	No fee per computer	No	Yes		Barracuda Backup Service	Yes[ citation needed ]	Yes		No	Yes	United States, Canada, APAC,   Europe	No			?
Box	Yes	No	Yes	Yes	Yes	Yes [7]	No [7]	?	Yes	No			Box	Yes [8]	Yes [9]	Yes			United States	10 GB	250 MB (Free) 5 GB (Paid)
Carbonite	Yes	No	Yes	Yes	Yes	Yes	Partial, optional for Windows only [10]	?	Yes (Business only)	Yes (Home only)	No [11]	Yes [12]	Carbonite		Yes	Yes	Yes [13]		United States	No	4 GB	Yes [14]	Yes
CloudMe	Yes	Yes	Yes	Yes	Yes	No, but 3rd party apps available[ citation needed ]		?		No		Yes	CloudMe	Yes [15]	Yes	Yes			Sweden	3 GB	150 MB (Free Accounts) No limit (Premium Accounts)	No Limit	No
Comodo Backup	Yes	No	No			Yes [16]	No	?	Yes	No	Yes (5)		Comodo Backup	No	No		No		United States	No
CrashPlan	Yes	Yes	Yes	Yes	Yes	Yes [17]	Yes, except for web restore [18]	Yes	Yes, 10TB	No	No	Yes [19]	CrashPlan	No	No	Yes [20]	No	No	United States,   Australia [21]	No	No Limit	Yes [22]	No
Dropbox	Yes	Does not work on filesystems other than ext4 and btrfs	Yes	Yes	Yes	Yes	No [23]	?			Yes		Dropbox	No	Yes	Yes	Yes			2 GB	No Limit [24]	Yes [25]			No
Dropmysite	Yes	Yes	Yes			Yes	No	?	Yes	No	No	Yes	Dropmysite		Yes	Yes	Yes		Global	2 GB	No limit		?
Egnyte	Yes	Yes	Yes			Optional [26]	Optional [26]	?					Egnyte	Yes [27]	Yes	Yes	Yes		United States	No	No limit		?
ElephantDrive	Yes	Yes [28]	Yes	Yes [29]		Yes	Optional (off by default) [30]	?	Yes	No			ElephantDrive	Yes [31]	Yes [32]	Yes	Yes [33]		United States	2 GB		Yes	?	No, Amazon AWS [34] [35]
Google Drive	Yes	No, no provider-sanctioned Linux support. [36] [37] [38]	Yes	Yes	Yes	Yes	No	?		No, Limited to 5 TB per user. See comments for details. [39]	Yes	Yes	Google Drive	No	Yes	Yes	Yes		United States, Worldwide	15 GB	5 TB [40]			Yes: 78% (supplied) 100% (matched) [41]	No
iCloud	Yes	No	Yes	No	Yes	Yes	Optional (off by default) [42]	?	No	No	Yes		iCloud	?	Yes	?	?		China for mainland China accounts; [43] unknown for others	1 GB (everyone) [44] 5 GB (Apple users only) [45]				Yes, 94% [34]	No
iDrive	Yes	Yes, but one has to manually run perl scripts. [46]	Yes	Yes	Yes	Yes [47]	Optional (excludes web interface) [48]		No	No	Yes [49]		iDrive		Yes	Yes	Yes	Yes	unknown	5 GB		Yes
Infrascale	Yes	Yes	Yes	Yes	Yes	Yes	Optional	Optional	Yes	Yes	No	Yes	Infrascale	No	Yes	Yes	Yes	Yes	United States,   Canada,   United Kingdom,   South Africa,   Australia,   New Zealand,   Jamaica	No	No limit	Yes	Optional
Jumpshare	Yes	No	Yes	No	Yes	Yes [50]			Yes	No	No	Yes [51]	Jumpshare		Yes	Yes	Yes	No	United States,   Europe	2 GB	250 MB on free, Unlimited on Jumpshare Plus			Yes: 75% (supplied) 100% (matched) [52]
Jungle Disk	Yes	Yes	Yes	Yes	Yes	Yes [53]	Yes [53]	Yes			Yes	Yes	Jungle Disk	Yes [54]	Yes	Yes	Yes		United States,   Europe	No	No limit in Backup Vault	Yes		Partial, Amazon AWS [34] [55] or Rackspace Cloud Files.
KeepVault	Yes	No	No			Yes [56]		?	Yes	No	Yes		KeepVault			Yes			United States		20 GB
Livedrive	Yes	No	Yes	Yes	Yes	No	No	?	Yes	Online Backup only	No	Yes	Livedrive	Yes (paid-only) [57]	Yes [58]	Yes	Yes	Yes	United Kingdom	No	No limit	Yes
MediaFire	Yes	Upload only	Yes	Yes	Yes	No	No	?	Yes	No	Yes	Yes	MediaFire	No	Yes	Yes	Yes		United States	10 GB	No Limit	No	No
MEGA	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes [59]	Yes	No	Yes	Yes	Mega Ltd.	No	Yes	Yes, using MEGA Desktop App	Yes	No	Europe,   New Zealand	20 GB	No limit	No	No
MiMedia	Yes	No	No			Yes [60]	No	?	Yes	No	Yes	Yes	MiMedia	No [61]	No	Yes	No	No	United States	7 GB	3 GB	Yes
OneDrive	Yes	No, see note [62]	Yes	Yes [63]	Yes	Yes [64]	No	?	Yes	No			OneDrive	No	Yes					5 GB for new users, 25 GB for older users	100 GB [65]			Yes: 75% sourced 100% matched	No
SpiderOak	Yes	Yes	Yes	Download Only	Download Only	Yes [66]	Yes [67]	?	Yes	Business only (min 10 users)	Yes	Yes	SpiderOak	No [68]	Yes	Yes	Yes			(2 GB free for 60 days only)	No limit	Yes	Yes [69]		No
SugarSync	Yes	No	Yes	Yes	Yes	Yes [70]	No [71]	?	Yes	No	No		SugarSync		Yes	Yes	Yes (SugarSync account needed for folders)			No	100 MB (web) No limit (client app) [72]
Syncplicity	Yes	No	Yes	Yes	Yes	Yes [73]	No [73]	?			Yes		Syncplicity		Yes	Yes	Yes		United States	10 GB
Tarsnap	Yes via [WSL2](https://www.tarsnap.com/download.html#windows) or Cygwin	Yes	Yes	No	No	Yes	Yes [74]	?	No	No	Yes		Tarsnap	No						No				No, Amazon AWS [34] [75]	No
Tresorit	Yes	Yes [76]	Yes	Yes	Yes	Yes	Yes	Yes [77]	Yes	No	Yes	Yes	Tresorit	Yes [78]	Yes	Yes	Yes	No	Ireland,   Netherlands [79]	3 GB [80]	0.5 GB (free), 10 GB (paid) [81]	Yes	No
Unitrends Vault2Cloud	Yes	Yes	Yes			Yes [82]	No	?	No	Yes	Yes		Unitrends Vault2Cloud	Yes[ citation needed ]	Yes		No	Yes	United States	No
Yandex.Disk	Yes	Yes [83]	Yes	Yes	Yes	No [84]	No	?	Yes				Yandex.Disk	Yes [85]	Yes	Yes	Yes		Russia	10 GB	50 GB
Zmanda Cloud Backup	Yes	No	No			Optional [86]	Optional [86]	?			Yes		Zmanda Cloud Backup	Yes[ citation needed ]				Yes	United States,   Europe,   Singapore,   Japan		No limit	Yes	Yes	Partial, Amazon AWS or Google Cloud Storage [34] [87]

Legend

• ^1 Windows/Linux/Mac/iOS/Android/BlackBerry : Supported operating systems for thick client (native binary application), which provide background data transmission and setting services.
• ^2 Zero knowledge: The service provider has no knowledge of the user's encryption key, ensuring privacy of the backup data. ^{[88] [89] [90]}
• ^3 Secure Key Management: If yes, the user holds and controls the encryption key. If no, the service provider holds and controls the encryption key.
• ^4 Payment options/plans:
  • Limited MB plan: Pay per computer. Additional fee for storage over a threshold.
  • Unlimited MB plan: Pay per computer. Storage per computer is unlimited.
  • $/MB plan: Pay per unit of storage, but unlimited computers may share that storage.
• ^5 Cloud hosted Net Drive: Cloud can serve storage over WebDAV, SMB/CIFS, NFS, AFP or other NAS protocol, allowing files to be streamed from the cloud. A change made to the cloud is immediately accessible to applications on all clients without needing to pre-download (sync) the file in full.
• ^7 Sync: Synchronization between computers, and/or mobile devices (PDA, MDA,...)
• ^8 Public Internet file hosting
• ^9 Restore via physical media
• ^10 Server location: Countries where physical servers are located. Where the data will be located.
• ^11 Still in Beta version
• ^12 Whether the desktop client (if available) can detect and upload changes without scanning all files.
• ^13 Many backup services offer a limited free plan, often for personal use. Often it is possible to increase the free backup limit through coupons, referrals, or other means that are not included in this column. This column also does not include free trials that are only available for a limited period of time.
• ^14 External hard drive support: Can refer to an alternate backup destination or whether the service can back up external drives.
• ^15 Hybrid Online Backup works by storing data to local disk so that the backup can be captured at high speed, and then either the backup software or a D2D2C (Disk to Disk to Cloud) appliance encrypts and transmits data to a service provider. Recent backups are retained locally, to speed data recovery operations.
• ^16 Unlimited BW: If bandwidth capping or limits are used on accounts.

Comments

Acronis

Up to five PCs, always incremental backups, remote access from the web

Backblaze

Data de-duplication; block-level incremental.

Barracuda Backup Service

Data de-duplication; real-time hybrid on-site/off-site data back-up.

BullGuard Backup

5 PC/license, fast upload speeds, mobile access, encrypted transfer and storage, password-protected settings, free 24/7 support.

Carbonite

Block-level incremental, Home or Pro editions. iPhone/ Blackberry/ Android App available to remotely access data from the online backup (For Pro: Users of the computer which are backed up, not available for the Administrator of the Pro). Can manually select files to upload that are larger than 4 GB.

Cloudberry Backup

Image & File Based backups, data de-duplication, block-level and multiple cloud providers supported.

CloudJuncxion

Decentralized multi-cloud backup with integrated sharing, sync, backup, and Cloud NAS. Fault-tolerance against failure of a constituent cloud.

Crashplan

Unlimited destinations. Data de-duplication; block-level incremental. Can run server-free, exchanging backup space with friends and family.

Datashield

High-level encryption, personalized encryption key, shared cloud drive, sync folder functionality .

Dolly Drive

Cloud storage that is specifically designed for the Mac. Also allows users to store files exclusively in the cloud for seamless access on any computer or mobile device.

Diino

iPhone/Android app available.

Dropbox

Data de-duplication, delta sync, iPhone/Android/Blackberry app available.

Dropmysite

website backup, database backup, SFTP support, free up to 2 GB.

Egnyte

Delta sync, Google Docs sync, user and group management

ElephantDrive

Auto-transfer from defunct Xdrive.

F-Secure

[Steek acquired by F-Secure July 2009]

Humyo

Humyo was acquired by Trend Micro and will become part of Trend Micro SafeSync. Humyo no longer accepts new clients.

IASO Backup

Advanced^{[ clarification needed ]} data reduction technology. Data de-duplication mechanism. High level^{[ clarification needed ]} of scalability and cost effectiveness.

ICFiles

Secure File Share Storage. Proprietary license download client. High level security, SOC 2 TYPE II, ISO 27001,27017, 27018, CSA, PCI, HIPAA, CJIS, EU Model Clauses, on request private servers for FISMA and FedRAMP.

IDrive

Proprietary license download client. Automatic Selection. Continuous Data Protection. "Virtual drive" explorer.

Jungle Disk

Proprietary license download client sample code.

KeepVault

Real-time hybrid on-site and offsite data backup.

Memopal

Cross-user de-duplication, delta sync.

MiMedia

Initial seed via a MiMedia-owned external hard drive available (no extra cost, shipping included).

Mozy

Data de-duplication; block-level incremental. "Mozy Data Shuttle" physical seeding service available for extra fee.

Replicalia

Professional Backup for Professional Data.

SpiderOak

Data de-duplication."Zero Knowledge" encryption.

StoreGrid Cloud

Byte-level incremental backup, local backup, Disk Image backup—BMR and physical seeding.

Syncplicity

Google Docs sync, Central Management with Business Console.

Tarsnap

Client source available; data de-duplication; block-level incremental.

TeamDrive

Store encrypted data on any WebDAV server; supports working offline; files can be commented; built-in support for conflict resolution.

Unitrends Vault2Cloud

Data de-duplication; hybrid on- and off-premises data backup; physical seeding.

UpdateStar Online Backup

Data de-duplication; block-level incremental.

Usenet backup

Is the method of storing backup data on the usenet. ^[91]

Windows Live Mesh

Replaces windows live sync and windows live folder.

Zetta Enterprise-grade Online Backup

Supports Linux, Mac OS, and Windows, high speed WAN optimization, SAS 70 certified data centers.

Zmanda Cloud Backup

Available in German and Japanese languages, supports MS SQL Server, MS Exchange, SharePoint, MySQL Database, System State, Oracle.

Versioning

Any changes can be undone, and files can be undeleted.

Acronis

Supports detailed history of changes to files with browsing by date or version number.

Backblaze

Old versions of files are kept for 30 days by default; One-year or Forever Retention is optional. ^[92]

Box

Versioning is included in paid subscription

Carbonite

Keeps old versions for up to three months. It keeps one version for each day of the past week, one version for each of the previous three weeks, and one version for each of the previous two months that the file has been backed up. Versioning available for PC computers only; not available for Mac.

CloudJuncxion

Supports multiple versions less than a week old, one version less than two weeks old, one version less than month old, and one version older than a month.

Crashplan

Options: All, or staged (daily, then weekly, etc.).

Cubby

All previous versions and deleted files are kept until explicitly removed by the user or the user runs out of space. All deleted files and previous versions count towards the storage limit.

Dolly Drive

Yes. Keeps unlimited versions of files.

Dropbox

By default, Dropbox saves a history of all deleted and earlier versions of files for 30 days for all Dropbox accounts. ^[93]

Dropmysite

Provides incremental backups with the ability to download every snapshot.

ElephantDrive

Any number of versions can be kept for any amount of time.

Google Drive

Old versions of files are kept for 30 days or 100 revisions. Revisions can be set not to be automatically deleted.

IASO Backup

All versions of files can be kept for different periods of time, starting from 1 month to 1 year or more.

ICFiles

No files are kept after delete, auto delete clears at every 24 hours.

iDrive

Up to 10 old versions of files are kept forever (until explicitly removed).

Mozy

Old version of files are kept for 30 days. Pro 60 days, Enterprise 90 days. ^[94]

PowerFolder

Five versions are kept online. In the client it is configurable how many versions to store locally.

SOS Online Backup (Infrascale)

All versions are kept. Only the largest counts towards the storage limit.

SpiderOak

All versions are kept. All files can be undeleted.

SugarSync

Five versions are kept. Only the most recent version of each of existing files as well as deleted files count towards the storage limit.

Sync.com

Sync.com saves a history of all deleted and earlier versions of files, 30 days for free accounts, indefinitely for premium plans.

Syncplicity

Old versions of files, as well as deleted files, are kept for 30 days. Configurable for business or enterprise-class services.

TeamDrive

All previous versions are kept and can be restored.

Tresorit

Versioning is included in paid subscription

Zetta Enterprise-grade Online Backup

All versions are kept. All files can be undeleted.

Other features and limitations

Other notable limitations or features.

Baidu Cloud

Must be registered by verified phone first.

Box

Performance degrades after 10,000 files in sync folder. Technical limit of 40,000 files in sync folder. Does not sync .tmp files, Outlook PST files, hidden files (hidden folders are synced), or any file or folder with \/*?":<>| in the name. ^[95]

CloudJuncxion

Decentralized fragment-and-disperse storage across a collection of heterogeneous clouds for maximal security. Supports a Virtual Private Cloud model for complete control by the enterprise customer. Supports Sync Groups for greater control over synchronization of files across multiple devices.

Dropbox

Performance degrades with more than 300,000 files in sync folder. This is a soft limit. ^[96]

Google Drive

All account types are limited to 750 GB upload bandwidth per day. ^[97] Enterprise accounts are now limited to 5 TB per paid user on the account whereas prior to May 2023 only a single user was required for the advertised unlimited storage. Once 5 users are on an Enterprise account, more storage can be requested in 25 TB allotments once every 90 days, but extra storage is not guaranteed. The extra allotted storage is also removed when users on the account drop under 5. Thus unlimited storage is unfeasible to attain with Google Drive's new restrictions.

Sugarsync

Limited to 80,000 files per top level sync folder. To work around, one can create multiple syncing folders, but each top level folder is limited to 80k files. Also, Microsoft outlook and Apple iTunes databases are unsupported. ^[98]

Trustbox

A 3-layer encrypted storage supports privacy for an unlimited file version retrieval. Restore any file from any point in time. ^[99]

Defunct services

• Bitcasa closed its services in February 2017. ^[100]
• Copy was discontinued on May 1, 2016 ^[101]
• Dell DataSafe was discontinued on June 11, 2015. ^[102]
• drop.io
• Mozy, shutdown in 2019, and it redirects users to Carbonite
• Norton Zone was discontinued on July 7, 2014. ^[103]
• Streamload aka MediaMax
• Ubuntu One was discontinued on June 1, 2014. ^[104]
• Windows Live Mesh
• Wuala was discontinued on November 15, 2015. ^[105]
• Xdrive
• ZumoDrive

See also

• File hosting service
• Remote backup service
• Comparison of online music lockers
• Comparison of file synchronization software
• Comparison of file hosting services
• Cloud storage
• Shared resource
• File sharing
• List of backup software

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