This isn't really a brand-versus-brand fight, it's a philosophy question that comes up the moment someone's photo library or work archive outgrows a single laptop. Synology represents the self-hosting path: buy a physical NAS device once, own your data outright, no subscription. Cloud backup, benchmarked here against Backblaze as the simplest representative example, represents the subscribe-and-forget path: pay monthly, never touch hardware, never worry about a drive failing in your closet. Over years of actual use, which approach genuinely costs less and protects your data better?
To find out, we ran the same dataset (a mix of photos, documents and video) through a mid-range Synology NAS and a Backblaze cloud subscription for 90 days, calculated real total cost of ownership over a 5-year window including hardware replacement and drive failure scenarios, and timed full restores from both systems under realistic conditions. Here's everything we found, round by round.
Round 01 · 5-Year Total CostThe total cost question — what does each path actually cost over years?
We calculated real total cost of ownership over a 5-year window: Synology's upfront hardware plus drives plus a realistic drive-replacement scenario, against a continuous Backblaze subscription over the same period, for a comparable amount of stored data (roughly 4TB).
Synology — higher upfront, lower over time at scale
Synology's upfront cost (NAS enclosure plus drives) is substantial, but once paid, ongoing cost is minimal beyond electricity, our 5-year calculation found it becomes meaningfully cheaper than a continuous subscription once you're storing several terabytes of data.
Cloud Backup — low upfront, scales with storage size
Backblaze's subscription has effectively zero upfront cost, but our 5-year calculation showed the ongoing monthly fee accumulates to exceed Synology's total cost once you cross a few terabytes of stored data, the crossover point that matters most for this decision.
Where the crossover point actually sits
Based on our calculation, a NAS typically becomes the cheaper option somewhere around the 2-3 year mark for libraries in the multi-terabyte range, and the gap widens the more data you store. For smaller libraries under roughly 1TB, the math often favors cloud backup's zero upfront cost instead.
Synology Winner
- Becomes cheaper than ongoing subscription after the crossover point
- Marginal additional cost as storage needs grow
- Substantial upfront hardware investment required
Cloud Backup
- Zero upfront cost, immediate start
- Accumulates to a higher 5-year total for large libraries
- Cost scales directly with subscription tier as data grows
Round 02 · Maintenance & SetupThe maintenance question — what does each path actually require from you?
We tracked the real time investment required to set up and maintain both systems over our 90-day testing period.
Synology — real setup time, real ongoing maintenance
Setting up the Synology NAS took genuine effort, initial configuration, drive installation, software setup, and ongoing maintenance included periodic firmware updates and monitoring drive health, real but not overwhelming time investment for anyone reasonably comfortable with technology.
Cloud Backup — install and forget
Backblaze's setup took minutes, install the app, confirm, done, with essentially zero ongoing maintenance required, the simpler experience by a clear, wide margin for anyone who doesn't want to think about backup infrastructure at all.
"A NAS is a real piece of infrastructure you're responsible for, not a problem you solve once and walk away from."
— Karthik Nair, Editor, Software & SecuritySynology
- Full control over your own hardware and configuration
- Real setup time and ongoing maintenance burden
Cloud Backup Winner
- Minutes to set up, near-zero ongoing maintenance
- No technical infrastructure to manage long-term
- Lowest barrier to entry of the two
