Non-EU vendorPersonal Backup & SyncHeadquarters: US

SpiderOak ONE Backup: sovereignty score and 8 European alternatives

SpiderOak ONE is a backup service with built-in sync and secure sharing for Windows, macOS and Linux. It makes versioned copies of selected folders with point-in-time recovery, keeps folders consistent across devices (including through a Hive folder), and offers share rooms and file links that expire automatically. SpiderOak ONE is delivered as a client app with a hosted cloud service.

SpiderOak is a US company and describes itself as 100% US-owned and operated. According to SpiderOak, backups are stored in its own data centre; the company says it owns and operates its servers and does not use third-party providers such as AWS or Microsoft Azure. Its support documentation states that files are encrypted on the device with AES-256 before upload, and SpiderOak says it cannot read them (No Knowledge). The software is not open source. For a European organisation, the provider remains a US party; client-side encryption limits what the provider can read, but it does not change the company's jurisdiction.

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Sovereignty score

27 / 1000 = high exposure
100 = sovereign

Jurisdiction SOV-210
Headquartered in the US: CLOUD Act and FISA 702
Data residency SOV-350
Hosting inside and outside Europe (EU, OTHER)
Cryptographic key sovereignty SOV-320
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-615
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	US (US)Verified by hand
EU adequacy decision	Only for companies individually certified under the EU-US Data Privacy FrameworkVerified 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	spideroak.one ↗

How we verify · Something wrong? Suggest a correction

Top EU-based & GDPR-compliant alternatives to SpiderOak ONE Backup

The European alternatives to SpiderOak ONE Backup come from our knowledge base of over 6,800 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

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

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Why digital sovereignty matters with SpiderOak ONE Backup

SpiderOak ONE Backup is headquartered in the United States. US vendors fall under the CLOUD Act and FISA 702: US authorities can compel access to data, even when that data sits in a European data centre. That is the core of the jurisdictional exposure in our model.

SpiderOak ONE 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.

SpiderOak ONE 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 SpiderOak ONE 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 SpiderOak ONE Backup?

It depends on your use case. Strong EU alternatives to SpiderOak ONE 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 SpiderOak ONE Backup?

Yes. Open-source EU alternatives to SpiderOak ONE 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 SpiderOak ONE Backup GDPR-compliant and where is the data hosted?

SpiderOak ONE Backup is headquartered in US 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.

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.

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