Non-EU vendorPersonal Backup & SyncHeadquarters: TW

Synology C2 Backup: sovereignty score and 8 European alternatives

Synology C2 Backup is a cloud service for backing up endpoints and Microsoft 365, managed from a single console. It comes in two editions: C2 Backup for Business, for centralised backup of Windows PCs and servers, Macs and Microsoft 365 (Exchange and OneDrive), and C2 Backup for Individuals, for personal PCs and OneDrive. The service makes full-device backups of Windows and macOS. C2 is delivered as client software with a cloud service hosted by Synology.

Synology is headquartered in Taiwan and is a privately held company. C2 has data centres in Frankfurt (Germany) and Seattle (United States); according to Synology, users can choose where their data is hosted, and each site is independently compliant with local regulations and laws. Synology states that C2 uses server-side and client-side encryption with user-generated private keys. The software is not open source. Choosing Frankfurt keeps data in the EU, but the provider remains a non-European company.

See the 8 European alternatives ↓Assess your stack with Synology C2 Backup pre-selected

Mastodon LinkedIn Bluesky X Email

Sovereignty score

42 / 1000 = high exposure
100 = sovereign

Jurisdiction SOV-250
Headquartered outside the EU (TW)
Data residency SOV-350
Hosting inside and outside Europe (EU, OTHER)
Cryptographic key sovereignty SOV-340
Key management with a non-European vendor
Freedom from lock-in SOV-640
Closed source: switching requires data migration
Source & runtime sovereignty SOV-4 · SOV-630
Closed source, runtime with the vendor

SOV codes: the matching objective in the European Commission's Cloud Sovereignty Framework. Official source

How the score is calculated

Facts and evidence

Last checked October 5, 2026

Headquarters	TW (OTHER)Verified by hand
EU adequacy decision	No — no adequacy decisionVerified by hand
Sovereignty model	Vendor-hosted (non-EU)Verified by hand
Data hosting	EU, OTHERVerified by hand
Open-source	NoVerified by hand
GDPR-compliant	YesVendor-stated
Category	Personal Backup & Sync
Type	Product
Website	c2.synology.com ↗

How we verify · Something wrong? Suggest a correction

Top EU-based & GDPR-compliant alternatives to Synology C2 Backup

The European alternatives to Synology C2 Backup come from our knowledge base of over 7,800 vendors. We only list vendors headquartered in the EU or the EEA; fully European-owned vendors rank before vendors with a foreign owner. For each alternative you see the country, the open-source status and a short description.

Score per alternative: 0 = high exposure, 100 = sovereign

20 European Personal Backup & Sync vendors are in the catalogue. View the whole category · Submit an alternative · View category on the map

Is Synology C2 Backup one of many dependencies?

Score your whole stack in about three minutes. Free, no account needed.

Assess your stack →View a sample report (opens in a new tab)

Why digital sovereignty matters with Synology C2 Backup

Synology C2 Backup is headquartered in TW, outside the EU. Contracts and data therefore also fall under non-European law. The GDPR applies through contractual terms, but in a conflict with local legislation you have less certainty than with a European vendor.

Synology C2 Backup hosts data in EU, OTHER. Exactly what stays within the EU — and what does not — is defined by the vendor's data processing agreement and sub-processor list, not by a setting you control yourself; check those documents for the precise scope, including backups, logs and support access.

Synology C2 Backup is closed source and hosted by the vendor. The encryption keys and the runtime sit with the vendor and switching requires data migration. Ask about bring-your-own-key, export options and open standards.

What this means for your organisation depends on your whole stack and context. The free assessment weighs Synology C2 Backup together with your other vendors and gives a total score, a heatmap and the main risk drivers.

Frequently asked questions

What is the best European alternative to Synology C2 Backup?

It depends on your use case. Strong EU alternatives to Synology C2 Backup include Acronis True Image, Ashampoo Backup and Backup4all. On this page you can compare 8 EU alternatives by jurisdiction, data residency and open-source status.

Are there open-source alternatives to Synology C2 Backup?

Yes. Open-source EU alternatives to Synology C2 Backup include BorgBackup, Cryptomator and FreeFileSync. These keep your data fully under your own control and let you self-host if you want to.

Is Synology C2 Backup GDPR-compliant and where is the data hosted?

Synology C2 Backup is headquartered in TW (OTHER) and hosts data in EU, OTHER. The vendor states it is GDPR-compliant, but the data falls under non-EU jurisdiction. For full EU data residency the EU alternatives on this page usually offer more certainty.

Details and sources

Verified by handHeadquarters, owner, hosting locations and licence have been checked by us against public sources. Free of charge and for every vendor, not a paid label. Nothing in this knowledge base is taken over automatically. Last checked on October 5, 2026.

Sources

Public sources used in the latest check of this record.

c2.synology.com/

Compliance evidence

The links below point to the vendor's own public documents. We only record what we found: a missing link means "not found publicly", not "not compliant".

No public compliance evidence has been recorded for this vendor yet. Do you know its DPA or subprocessor list? Something wrong? Suggest a correction

Digital sovereignty in Personal Backup & Sync

Personal Backup & Sync: Personal backup tools, file synchronisation and data recovery. In this category the choice of vendor determines who has legal access to your data, where that data lives and how easily you can switch later.

Also in this category

See all →

Open in the alternatives dashboard Missing a vendor? Submit it Are you this vendor? You can also become a sponsor on the Personal Backup & Sync page — with no effect on your score