💾 Disaster Recovery & Ransomware Defense

Best Encrypted Cloud Backup Services 2026

Compare automated, continuous computer backup solutions. Protect your PC, Mac, and external hard drives against total disk failure, hardware loss, and zero-day ransomware.

Best Overall: Unlimited Backup

Backblaze

Rating: 4.6/5 • From $6.75/mo

Completely unlimited backup storage per computer with automatic external drive inclusion, AES-128/256 encryption, and 1-year version history.

✓ Truly unlimited data (zero file size caps)
✓ Backs up connected external USB drives
✓ Rapid restore by mail (encrypted USB drive)
• Single computer license per subscription

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Best for Multiple Devices

IDrive

Rating: 4.5/5 • From $4.95/mo

Multi-device backup covering PCs, Macs, mobile phones, and NAS devices under a single shared storage allotment (5TB to 20TB).

✓ Unlimited PCs, Macs, and mobile devices
✓ Private Key Encryption (PEK) available
✓ Disk image & clone backup capabilities
• Fixed storage caps (5TB / 10TB)

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Best for Professionals & SMBs

CrashPlan

Rating: 4.4/5 • From $9.99/mo

Enterprise-grade automated computer backup designed for power users, creators, and small businesses with continuous byte-level deduplication.

✓ Unlimited cloud backup with granular file retention
✓ Configurable CPU throttling and schedule rules
✓ High-compliance AES-256 zero-knowledge encryption
• Higher base price point than consumer backups

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Cloud Backup Benchmark & Feature Comparison

Evaluation Criteria	Backblaze	IDrive	CrashPlan
Storage Quota	100% Unlimited	5 TB to 20 TB Tiers	100% Unlimited
Devices per Subscription	1 Computer (+ Unlimited USB Drives)	Unlimited PCs, Macs & Phones	1 Computer per license
Zero-Knowledge Key (PEK)	Optional Private Key	Optional Private Key	Custom Key Supported
External Hard Drive Backup	Yes (Included standard)	Yes (Counts against quota)	Yes (Included standard)
File Version History	1 Year Standard (Forever optional)	30 Versions retained	Unlimited Version History
Rapid Physical Restore Delivery	FedEx Encrypted Hard Drive (Refundable)	IDrive Express Drive	Web & Local client only
Entry Monthly Cost	From $6.75/mo ($99/yr)	From $4.95/mo ($59.62/yr)	$9.99/mo per device

Why You Need Dedicated Encrypted Cloud Backup in 2026

Relying solely on consumer cloud sync (such as Google Drive, OneDrive, or Dropbox) is one of the most hazardous security errors individuals make. Sync tools synchronize local changes in real time—meaning if a ransomware variant encrypts your local documents, that corrupted state is instantly mirrored to the cloud, destroying your files across all synced endpoints.

True cloud backup solutions employ write-once archival versioning, system-level file system snapshotting, and background monitoring that prevents infected local data from overwriting historical snapshots.

Need to compare interactive cloud drive sync against disaster backup? See our pCloud vs Backblaze Head-to-Head Comparison.

Frequently Asked Questions

What is the difference between cloud storage and cloud backup?

Cloud storage (like Dropbox or pCloud) synchronizes specific folders across active devices for day-to-day collaboration. Cloud backup (like Backblaze or IDrive) continually creates automated mirror copies of your entire hard drive, operating system files, and connected external drives to ensure recovery after hardware failure or ransomware.

Can encrypted cloud backup protect against ransomware?

Yes. Leading backup platforms maintain immutable file version history (typically 30 days to 1 year). If ransomware encrypts your local drives, you can roll back your system to an uninfected point-in-time snapshot prior to the infection.

Which backup service offers truly unlimited storage?

Backblaze and CrashPlan offer truly unlimited cloud backup per licensed computer with no file size limits. IDrive operates on fixed multi-device storage tiers (e.g. 5TB or 10TB) that can backup unlimited computers and mobile devices under a single plan.

What is a Private Encryption Key (PEK) in cloud backup?

A Private Encryption Key (PEK) ensures that files are encrypted on your local machine using a custom passphrase before uploading. The cloud provider cannot view or decrypt your backup files without this key, providing true zero-knowledge privacy.