Backblaze B2 vs Synology C2 (2026): which should you pick?
As of Nov 13, 2026, Backblaze B2 and Synology C2 share a 2.0 GPA, and only Backblaze B2 has a free plan.
Checked Nov 12, 2026 · graded Nov 12, 2026 and Nov 13, 2026 by ToolGPA
Backblaze B2 grades higher on platforms. Synology C2 grades higher on ease of use. They get the same grade on value for money, the free plan and features.
Price, platforms and features side by side. The table says where each price was read and when.
Backblaze B2
S3-compatible object storage billed per terabyte
Synology C2
Synology's cloud storage and backup for NAS and S3 workloads
Which one is for you
Pick Backblaze B2 if
- Fits if you have developers or an IT person to point backup tools at an S3 bucket
- Works for teams storing terabytes of backups that rarely get read back
Look elsewhere if
- Skip it if you want a folder that syncs to your laptop, as there is no consumer sync app
- Tight if you read a lot back: egress beyond 3 times your stored data costs $0.01 per GB
- Watch out: API calls past the first 2,500 a day cost $0.004 per 10,000 on Class D transactions
- Watch out: B2 Overdrive is $15 per TB and up, with a multi-petabyte commitment bought by quote
Pick Synology C2 if
- 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
Look elsewhere if
- 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
How we grade them
| 2.0GPABackblaze B2Fair | 2.0GPASynology C2Fair | |
|---|---|---|
| Value for money | C$6.95 per TB a month matches the category's middle price. This is a different kind of product from consumer storage, billed by the terabyte. | C$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. |
| Free plan and trial | CThe first 10 GB is always free, with free egress up to 3 times what you store, and you'll pass 10 GB quickly. | CA 30-day free trial with no credit card needed. There's no free plan. |
| Features | CStorage through an S3-compatible API with lifecycle and partner integrations, but the page shows no consumer sync app. It does its narrow job fully. | CHyper 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. |
| Ease of use | DIt needs an API, keys and tooling, so it's a developer service. No store rating on record. | CNo rating on record. You connect it from a Synology NAS or an S3 tool and set up your own backup jobs. |
| Platforms and integrations | BThe vendor lists 8 integrations and an S3 API, but it is web only, with no apps. | CWeb portal plus Mac, Windows and Linux programs, with Veeam, Cyberduck and Synology DSM. No phone app is named. |
| Best for | cheap object storage for developers and IT teams | backing up a Synology NAS to the cloud |
The GPA is the average of the five grades: an A is 4 points, an F is none. The full reasons are on each tool's page: Backblaze B2 and Synology C2. How we grade
Price against what you get
Backblaze B2 starts at $6.95 a month and scores 2.0 out of 4 on features, ease of use and platforms. Synology C2 starts at $7.99 a month and scores 2.0.
They score the same, and Backblaze B2 starts $1.04 a month lower. Of the other file storage and sync services on the chart, 20 score higher than Backblaze B2 for less, and 21 score higher than Synology C2 for less.
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
Where they differ
- Synology C2 is end-to-end encrypted, according to its own site.
- Synology C2 also covers file sync.
At a glance
| Backblaze B2 | Synology C2 | |
|---|---|---|
| Pricing | Free plan | Free trial |
| Starts at | $6.95 per TB / month | $7.99 per TB / month (C2 Object Storage) |
| Free plan | The first 10 GB of storage is always free, with free egress up to 3x the data stored. | None |
| Free trial | None listed | 30-day free trial, no credit card required |
| Web | ||
| macOS | ||
| Windows | ||
| Linux | ||
| Made by | Backblaze | Synology Inc. |
| Price read from | backblaze.com | c2.synology.com |
| Checked | Nov 12, 2026 | Nov 12, 2026 |
Worth knowing
Backblaze B2
- Egress beyond 3x the average monthly data stored costs $0.01 per GB, except to partner CDNs and compute services.
- Class D API transactions cost $0.004 per 10,000 calls after the first 2,500 each day.
- B2 Overdrive needs a multi-petabyte commitment and is sold by quote.
- It is a storage service for developers and IT teams; the page shows no consumer sync app.
Synology C2
- 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
Backblaze B2
- S3-compatible object storage
- The page describes S3-compatible storage for active archiving, backup and recovery, media and application workloads.
- No minimums on files or duration
- There are no minimum file size or storage duration fees, and class A, B and C API calls are free on pay as you go.
- Free egress allowances
- Egress is free up to 3x the average data stored, and free to partner CDNs and compute services such as Cloudflare, Fastly and bunny.net.
- Capacity commitments
- Customers can commit to a set amount of storage for 1 to 5 years, billed for the full term at contract start with a locked rate.
Synology C2
- 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.
Plans
Backblaze B2
Backblaze B2$6.95
per TB / month, billed monthly on byte-hours stored
Pay as you go, or commit to capacity for 1 to 5 years with discounts. Free egress up to 3x stored data, then $0.01/GB.
B2 Overdrive$15
per TB / month and up
For AI, HPC and research workloads: dedicated vaults, unlimited free egress and a multi-petabyte commitment. Sold by quote.
Synology C2
C2 Object Storage$7.99
per TB / month
S3-compatible storage with free retrieval, no API or deletion fees and no minimum storage duration.
C2 OneStorageCustom
One capacity plan covering Hyper Backup, Hybrid Share, Object Storage and Surveillance365; price shown by a calculator.
Ways to pay less
Backblaze B2
- Other savings
Discounts for volume and term commitments
The pricing page says discounts are available when you commit to volume and a 1 to 5 year term; the amounts are not published.
Synology C2
No public discounts listed.
Common questions
Which is cheaper, Backblaze B2 or Synology C2?
As of Nov 12, 2026, Backblaze B2 is cheaper to start with: $6.95 a month, against $7.99 a month for Synology C2. Backblaze B2 starts at $6.95 per TB / month, and Synology C2 starts at $7.99 per TB / month (C2 Object Storage).
Which has a free plan, Backblaze B2 or Synology C2?
As of Nov 12, 2026, only Backblaze B2 has a free plan. Synology C2 does not, though it has a free trial.
Which platforms do Backblaze B2 and Synology C2 run on?
As of Nov 12, 2026, only Synology C2 lists macOS, Windows and Linux apps. Both list a web app. A platform missing from a listing is one its maker's pages did not mention.
More comparisons
How this page was made
- The verdict at the top follows a fixed rule. When both tools are in the same category and either is in our top three for it, the verdict follows that ranking: the higher-placed tool is our pick. The top three weigh who each tool suits as well as its grades, so a pick can go against the GPA. Otherwise the page does not pick one and says which grades higher: the higher GPA first; on a tie, the one with a free plan, then the one that starts cheaper in dollars a month, counted the same way for both; if they are still level, what the choice depends on.
- The grades are our own, from each tool’s review or report card. The GPA is their average.
- Prices, plans and platforms come from each tool’s listing. The table above says where each price was read and when.
- The differences and the answers to the questions are worked out from those listings.