Synology C2 review (2026): is it worth $7.99 a month?
Synology's cloud storage and backup for NAS and S3 workloads
Black Friday: is there a Synology C2 sale?
Synology C2 report card
Fair · out of 4.0 · graded Nov 13, 2026
Best for backing up a Synology NAS to the cloud
Synology C2 is cloud storage and backup that works with Synology's own NAS boxes, with S3-compatible object storage at $7.99 a terabyte a month. It isn't a general file sync app, the OneStorage price is only shown by a calculator, and some backup options need the Advanced plan.
Who Synology C2 is for
- Fits if you own a Synology NAS and want an offsite copy
- Works for teams that want S3 object storage at a flat per-terabyte rate
Who Synology C2 is not for
- Not for you if you want a consumer file sync app, because C2 is built around Synology NAS and S3 workloads
- Skip it if you don't own Synology hardware or an S3 tool to connect
- Watch out: prices exclude VAT, which is added at checkout
- Tight if you want deduplication or custom rotation, which need the Advanced plan of C2 Storage for Hyper Backup
- Watch out: OneStorage pricing is shown only by a capacity calculator
Why Synology C2 gets a 2.0
Five grades, each with its reason. The GPA is their average: an A is 4 points, an F is none.
- CValue for money$7.99 a TB a month for Object Storage, before VAT, which is between the middle ($7) and the dearer quarter ($9.99) of file storage. OneStorage has no readable price.
- CFree plan and trialA 30-day free trial with no credit card needed. There's no free plan.
- CFeaturesHyper Backup storage, Hybrid Share, S3 object storage, web restore and Express Box. But it's built for Synology NAS, and deduplication and custom rotation need the Advanced plan.
- CEase of useNo rating on record. You connect it from a Synology NAS or an S3 tool and set up your own backup jobs.
- CPlatforms and integrationsWeb portal plus Mac, Windows and Linux programs, with Veeam, Cyberduck and Synology DSM. No phone app is named.
What these grades rest on. Graded from this listing, whose facts were read from Synology's own pages on 12 November 2026. Not based on using the product, and shorter than our full reviews. How we review and grade.
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<a href="https://toolgpa.com/tools/synology-c2#review"><img src="https://toolgpa.com/badge/synology-c2.svg" alt="Synology C2: 2.0 GPA on ToolGPA" width="196" height="56"></a>Where Synology C2 stands among file storage and sync services
Synology C2's GPA of 2.0 is higher than 4 of the 45 other file storage and sync services we grade, and level with 8.
Its paid plans start at $7.99 a month, against a middle price of $6.32 for the category: 24 of the 37 others that charge start lower.
On features, ease of use and platforms it scores 2.0 out of 4. 21 tools score higher and cost less.
Each grade against the category
Every bar is all 46 file storage and sync services we grade, cut by the letter each got. Synology C2’s own letter is outlined.
- CValue for moneyAbove 9 of 45, level with 23
- CFree plan and trialAbove 4 of 45, level with 29
- CFeaturesAbove 1 of 45, level with 33
- CEase of useAbove 9 of 45, level with 13
- CPlatforms and integrationsAbove 0 of 45, level with 11
Price against what you get
Each dot is one of 40 file storage and sync services. Further left costs less, and higher up scores better on features, ease of use and platforms. Point at a dot to see which tool it is.
Features, ease of use and platforms, averaged
What paid plans start at, a month (each step along is roughly double) →
- The best score at each price
- Has a free plan
- No free plan
Keep Synology C2, or make your own?
Keep it
To replace Synology C2 you would be making files kept in step across devices without losing one. That is not a weekend's work, with an AI app builder or without one.
That makes this kind of software worth paying for, not this one in particular: 33 of the 45 other file storage and sync services grade higher. It costs $95.88 a year.
What you could not
- Files kept in step across devices without losing one.
- A file manager working directly on your disk.
- Apps for macOS, Windows and Linux that stay in step with each other.
- It plugs into other products, Veeam, Cyberduck and Synology DSM among them, and has an API.
- End-to-end encryption done properly.
- A physical object that comes with it.
What this rests on. Synology C2’s listing: what it does, where it runs, what it plugs into and what it costs. It is a judgement about the kind of software this is. We have not built a replacement for it, and making your own means looking after it too. How we decide, and every tool’s verdict.
What is Synology C2?
Synology C2 is a family of cloud services from Synology: C2 Storage for backing up and syncing Synology NAS data, C2 Object Storage with an S3-compatible API, and backup for PCs and Microsoft 365. Data can be held in Frankfurt or Seattle data centers.
Worth knowing
- C2 Storage is designed for Synology NAS; it is not a general-purpose consumer file sync app.
- The OneStorage price is shown only by a capacity calculator, so no figure was readable; $7.99 per TB is the Object Storage rate on its page.
- Prices exclude VAT, which is added at checkout by billing address.
- Deduplication and custom rotation need the Advanced plan of C2 Storage for Hyper Backup.
Key features
- C2 Storage for Hyper Backup
- Backs up Synology NAS data with versioning, deduplication on the Advanced plan and client-side AES-256 encryption.
- Hybrid Share
- Connects branch-office NAS devices to central cloud storage, streaming requested files and caching frequent ones locally.
- C2 Object Storage
- S3-compatible API with versioning and Object Lock, in EU and US data centers, with 11 nines of durability.
- Web portal restore
- Browse and download backed-up files from a browser, or restore with Hyper Backup Explorer on Windows, Mac and Linux.
- C2 Express Box
- A physical device for moving the first large batch of data into C2; options are available by contacting Synology.
Synology C2 pricing
As of Nov 12, 2026, Synology C2 is a paid product with a free trial, starting at $7.99 per TB / month (C2 Object Storage).
- Starts at
- $7.99 per TB / month (C2 Object Storage)
- Free plan
- None
- Free trial
- 30-day free trial, no credit card required
| Plan | Price | What you get |
|---|---|---|
| C2 Object Storage | $7.99per TB / month | S3-compatible storage with free retrieval, no API or deletion fees and no minimum storage duration. |
| C2 OneStorage | Custom | One capacity plan covering Hyper Backup, Hybrid Share, Object Storage and Surveillance365; price shown by a calculator. |
Read from c2.synology.com on Nov 12, 2026. Prices change, so confirm with Synology C2 before you buy.
Works with
- Veeam
- Cyberduck
- Synology DSM
Synology C2 alternatives
- Synology C2 vs Backblaze B2
Free plan · from $6.95/mo
- Synology C2 vs Wasabi
Free trial · from $7.99/mo
- Synology C2 vs IDrive
Free plan · from $0.25/mo
- Synology C2 vs Storj
Free trial · from $7/mo
Common questions
Does Synology C2 have an Android app?
No Android app was listed when its pages were read on Nov 12, 2026. Synology C2 is listed for Web, macOS, Windows and Linux.
Does Synology C2 have an iPhone app?
No iPhone app was listed when its pages were read on Nov 12, 2026. Synology C2 is listed for Web, macOS, Windows and Linux.
Is Synology C2 open source?
Synology C2 is not described as open source on its own site, as read on Nov 12, 2026.
Is Synology C2 end-to-end encrypted?
Synology C2 describes itself as end-to-end encrypted on its own site. Nobody here has audited that.
Does Synology C2 have an API?
Yes. Synology C2 offers a public API, according to its own site.
Sources for this page
The prices, plans, platforms and features above were read from these pages on Nov 12, 2026.