Cloud storage and backup

Cloud storage is a service that keeps your files on remote servers so you can reach, sync and recover them from any device. These cloud storage & backup reviews compare nine services on encryption, three-year cost per terabyte, renewal prices and how long they keep old versions.

9 cloud storage and backup services, ranked by research score

pCloudBest overall

2 TB for $99.99 a year or $499 once, apps for every platform including Linux, and a choice of US or EU storage; encryption is a paid add-on.

WindowsmacOSLinuxiOSAndroidWeb

8.3/10

From $49.99/yr

Official site pcloud.com

Proton DriveBest for privacy

End-to-end encryption on every plan, open-source audited apps and up to 10 years of file versions; terabytes come in the Duo and Family bundles.

WindowsmacOSiOSAndroidWebCLI (Windows, macOS, Linux)

8.3/10

From $3.49/mo

Official site proton.me

Sync.comBest encrypted storage for small teams

Every file end-to-end encrypted, up to 365 days of history and team admin controls; prices double after the first year.

WindowsmacOSiOSAndroidWebLinux (WebDAV)

8.2/10

From $6/mo

Official site sync.com

IDriveBest for backing up several devices

One 5 TB plan backs up every computer and phone you own, with 30 versions per file, for $83.88 the first year and $119.88 after.

WindowsmacOSLinuxiOSAndroidWeb

8.2/10

From $6.99/mo

Official site idrive.com

Backblaze Computer BackupBest unlimited computer backup

Unlimited backup of one Mac or PC and its drives for $99 a year, with one year of version history free and mailed USB restores.

WindowsmacOSiOS (access)Android (access)Web

Microsoft 365Best for Windows and Office users

OneDrive is built into Windows; Microsoft 365 Personal bundles 1 TB with Office for $99.99 a year, and Files Restore rolls back 30 days.

WindowsmacOSWebiOSAndroid

7.7/10

From $19.99/yr

Official site microsoft.com

DropboxBest sync and app integrations

The most mature sync with an official Linux app and wide integrations; Plus costs $119.88 a year for 2 TB with 30 days of history.

WindowsmacOSLinuxiOSAndroidWeb

7.6/10

From $9.99/mo

Official site dropbox.com

IcedriveBest low-cost storage with encryption

Client-side encryption included on 2 TB for $59 the first year and $99 after, with a Linux app; short history and a young company.

WindowsmacOSLinuxiOSAndroidWeb

Google WorkspaceBest free storage

Google Drive gives every account 15 GB free and the best real-time co-editing; 2 TB costs $9.99 a month, with no end-to-end encryption.

WebAndroidiOSWindows (via Outlook sync)macOS (browser and Drive for desktop)

Compare side by side

Every score and price in one table. Select a column to sort. Prices are US list prices; hover a price for the full terms.

Comparison of every tool in this category
pCloud8.37.69.07.89.08.2$49.99/yrYes14 days
Proton Drive8.39.57.28.87.49.0$3.49/moYes30 days
Sync.com8.29.07.68.67.68.0$6/moYes30 days
IDrive8.27.69.28.67.67.4$6.99/moYes–
Backblaze Computer Backup8.17.69.29.06.58.4$189––
Microsoft 3657.76.47.87.68.68.6Microsoft 365 Basic 100 GB $19.99/yr––
Dropbox7.66.86.87.49.68.0$9.99/moYes–
Icedrive7.57.48.46.68.06.6$59Yes30 days
Google Workspace7.45.87.86.89.08.615 GB free––

Is cloud storage the same as backup?

No. Sync storage keeps one folder identical on every device, so a deleted or ransomware-encrypted file is gone everywhere until you restore it from history. A backup copies your whole computer and keeps past versions for recovery.

Most services sold as cloud storage are really sync, including pCloud, Dropbox, OneDrive and Google Drive, while Backblaze and IDrive are true backup services that copy whole machines and keep their history. You often need one of each, and the US cybersecurity agency CISA’s ransomware guide recommends keeping offline, encrypted backups of critical data and testing them regularly.

Which cloud storage or backup service fits you?

Default to pCloud for sync. Its 2 TB plan costs $99.99 a year with no first-year discount to unwind, it runs on Windows, macOS and Linux, and you choose US or EU storage. Switch only when one applies.

  • If your files must stay private, use Proton Drive, which encrypts every plan end to end, publishes its app code and keeps file versions for up to 10 years on paid plans.
  • If a small team shares client files, pick Sync.com. Encryption is on by default.
  • If you protect several computers and phones, IDrive backs up all of them into 5 TB for $83.88 the first year and $119.88 after.
  • If one computer holds a lot of data, choose Backblaze. No storage cap, $99 a year.
  • If you want Office anyway, Microsoft 365 Personal bundles 1 TB of OneDrive with the apps for $99.99 a year.
  • If you share big files with clients all day, Dropbox has the most mature sync and the widest app integrations, though Plus keeps only 30 days of history for $119.88 a year.
  • If you run Linux on the desktop, drop Proton Drive, Sync.com, OneDrive and Google Drive. pCloud, Dropbox and Icedrive have Linux sync apps.

Three years of list prices tell you more than one:

PlanStorage3-year costPer TB over 3 years
BackblazeUnlimited, 1 computer$297$59.40 at 5 TB
IDrive Personal5 TB$323.64$64.73
pCloud Premium Plus2 TB$299.97$149.99
Dropbox Plus2 TB$359.64$179.82
Proton Duo2 TB (2 users)$539.64$269.82

Backup is cheapest per terabyte. That is all it does.

When should you not pay for cloud storage?

When your files fit in a free tier and you already keep a backup: Google gives every account 15 GB shared across Gmail, Photos and Drive, IDrive offers 10 GB for backup, and pCloud up to 10 GB. Don’t bother with terabytes for a few gigabytes of documents.

If you’ve already paid for Microsoft 365, you own OneDrive storage too: 1 TB on Personal, or 6 TB shared among six people on Family for $129.99. Don’t forget to check what you already pay for.

What traps catch cloud storage buyers?

Three come up repeatedly: renewal prices that double, sync folders treated as backup, and the word “encrypted” read as “private”. Each one bites late.

  1. Renewal jumps. Sync.com’s 1 TB plan costs $72 in its first year and $144 after, and Icedrive’s 6 TB plan goes from $149 to $269. Don’t skip the second-year price when you compare plans.
  2. Short history. Thirty days is the norm. When ransomware hits, history length matters more than price: Proton Drive keeps up to 10 years and Sync.com up to a year.
  3. Encryption claims. Every service here encrypts files on its servers, but only end-to-end encryption keeps the provider out. In 2024 ETH Zurich researchers found that a compromised server could attack the encryption at Sync.com, pCloud and Icedrive.

Lifetime plans are a fourth, quieter trap. pCloud’s 2 TB lifetime plan costs $499, five years of its annual price, and only pays off if the company lasts. Most people forget that part. Keep a second copy elsewhere.

How do we build our cloud storage & backup reviews?

Every service gets a research score out of 10 from official pricing and terms, security research, incident reports and documented features. We don’t run speed tests. Affiliate commissions never change a score.

Privacy and encryption carry 25%, price and long-term value another 25%, versioning and recovery 20%, apps and sharing 20%, and company track record the last 10%. In practice the tie between pCloud and Proton Drive at 8.3 is broken by the unrounded score, so read the criterion notes for your own priority. Related: notes and docs apps and productivity.

How we score cloud storage and backup services

Every product here is scored 0 to 10 on the same criteria, using published evidence. The overall score is the weighted average.

Privacy & encryptionWhether end-to-end (zero-knowledge) encryption is on by default, a paid add-on or missing; who holds the keys; legal jurisdiction; independent audits and open-source code; published research such as the 2024 ETH Zurich study; breach history.weight25%
Price & long-term valueMonthly, annual and lifetime prices; first-year discounts and the renewal price after them; total cost per terabyte over three years; free tier size; refund window.weight25%
Versioning & recoveryHow long deleted files and previous versions are kept, version caps, whole-account rollback or ransomware recovery, and restore options such as mailed drives.weight20%
Apps, sync & sharingDesktop apps for Windows, macOS and Linux; mobile apps and photo backup; files on demand or virtual drives; share controls (passwords, expiry, download limits); collaboration and team features.weight20%
Company track recordYears in operation, ownership and financial transparency, how incidents were disclosed and handled, and how much a lifetime plan depends on the company surviving.weight10%

Questions people ask

What is the cheapest cloud storage per terabyte?

Backup services win. Over three years at list prices, Backblaze costs $59.40 per terabyte if you back up 5 TB from one computer, and IDrive Personal costs $64.73 per terabyte for 5 TB across unlimited devices. Among sync services, pCloud 2 TB works out to $149.99. Bigger plans cost less per terabyte.

Which cloud storage is end-to-end encrypted?

Proton Drive and Sync.com encrypt every file end to end on every plan, and Icedrive includes client-side encryption on paid plans. pCloud sells encryption as a $49.99-a-year add-on. Dropbox, Google Drive and OneDrive personal plans lack it. The provider holds the keys.

Is a lifetime cloud storage plan worth it?

Only when you plan to stay for years and accept the company risk. pCloud's 2 TB lifetime plan costs $499, equal to five years of its annual plan, and pCloud defines lifetime as 99 years or the account holder's life. Icedrive's costs $699. Don't trust any single provider with irreplaceable files.

How long do cloud services keep deleted files?

When you delete a file on most personal plans, including pCloud, Dropbox and OneDrive, it stays recoverable for 30 days. Proton Drive keeps versions for up to 10 years on paid plans, Sync.com from 90 to 365 days, and Backblaze includes one year of version history at no extra cost.

Which cloud storage works on Linux?

If you've moved to Linux, pCloud, Dropbox and Icedrive have desktop sync apps, and IDrive covers Linux backups. Proton Drive offers only a command-line tool, Sync.com only WebDAV, and OneDrive and Google Drive have no official Linux desktop app. Backblaze Computer Backup does not support Linux.