Best Cloud Backup for NAS in 2026
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We evaluated cloud backup services based on pricing transparency, native NAS integration, storage limits, and data recovery features. This ranking is designed for individuals and businesses using Network-Attached Storage devices like Synology and QNAP who need reliable off-site data protection.
How we ranked these
At a glance
| # | Product | Score | Best for |
|---|---|---|---|
| 1 | IDrive | 9.2 | Users needing multi-device coverage under one plan with flexible storage tiers |
| 2 | Backblaze B2 | 8.8 | Users seeking cheap IaaS storage or those using backup managers to connect NAS to cloud |
| 3 | ElephantDrive | 8.5 | Users of specific NAS brands seeking cost-effective, dedicated solutions |
| 4 | Carbonite | 7.9 | Businesses prioritizing multi-computer coverage with structured tiered plans |
IDrive
9.2- Unlimited devices covered under one subscription
- True archiving: files remain stored until manually deleted
- Incremental backups transfer only modified file portions
- Plans range from $9.95/mo (5 TB) to $99.95/mo (100 TB)
- Storage overage costs ~$0.25 to $0.50 per GB
- Requires manual pruning to avoid limit fees
- No specific native NAS plugin mentioned; relies on mapped drives
Best for: Users needing multi-device coverage under one plan with flexible storage tiers
Backblaze B2
8.8- Direct NAS support for Synology devices without plugins
- Low storage cost at $0.005/GB/month
- Strong file versioning and recovery capabilities
- First 1 GB of downloads per day is free
- Download costs apply at $0.01/GB after the daily 1 GB free quota
- General NAS support requires third-party backup managers like CloudBerry
- No fixed monthly plan; pay-as-you-go model
Best for: Users seeking cheap IaaS storage or those using backup managers to connect NAS to cloud
ElephantDrive
8.5- Specialized integration for QNAP, Synology, WD, and D-Link NAS
- Optional zero-knowledge encryption
- Supports 10 devices per plan
- Paid plans start at $10/month for 1 TB
- Limited information on specific drawbacks or overage policies
- Higher entry price compared to Backblaze B2's pay-as-you-go
- Fewer device slots than IDrive's unlimited offering
Best for: Users of specific NAS brands seeking cost-effective, dedicated solutions
Carbonite
7.9- Virtual Drive feature for file access
- Safe Core plan covers up to 25 computers for $24/month
- Structured tiered plans (Safe Core, Safe Power, Safe Ultimate)
- 250 GB to 500 GB storage options available
- Higher monthly cost starting at $24/month for 250 GB
- Lower storage capacity compared to IDrive's 5-100 TB options
- No specific mention of native NAS integration in sources
Best for: Businesses prioritizing multi-computer coverage with structured tiered plans
Our verdict
IDrive offers the best balance of unlimited device support and flexible storage tiers, while Backblaze B2 is the most cost-effective for direct Synology NAS integration.
Frequently asked questions
Does IDrive support NAS devices directly?
IDrive supports NAS devices via mapped drives or IDrive apps, but does not offer a native plugin like Backblaze for Synology.
What is the cost of Backblaze B2 for NAS backups?
Backblaze B2 charges $0.005/GB/month for storage, with the first 1 GB of downloads per day free and $0.01/GB for excess downloads.
Which service offers zero-knowledge encryption for NAS?
ElephantDrive offers optional zero-knowledge encryption for its specialized NAS integrations.
How many devices does IDrive cover per subscription?
IDrive covers unlimited devices (PC, Mac, Linux, iOS, Android) under one subscription.
