Non-EU vendorPersonal Backup & SyncHeadquarters: US

Arq Backup: sovereignty score and 8 European alternatives

Arq Backup is desktop backup software for macOS and Windows. You can back up to a cloud account you already have, an SFTP server, an external drive or a NAS, and to several destinations at once. According to the vendor, backups use end-to-end encryption so that only you can read them, and they are stored in a documented, open format. The optional Arq Premium subscription adds storage managed by Arq and web access to your backups.

Arq is made by Haystack Software LLC, based in Lexington, Massachusetts, in the United States. The company describes itself as self-funded. The application is proprietary, with command-line restore tools published on GitHub. Where your data ends up depends on the destination you choose: a European cloud provider, your own NAS or an SFTP server in the EU keeps it under your control. The vendor's site does not state where Arq Premium storage is located. As a US company, Haystack Software is subject to US law, including the CLOUD Act.

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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	arqbackup.com ↗

How we verify · Something wrong? Suggest a correction

Top EU-based & GDPR-compliant alternatives to Arq Backup

The European alternatives to Arq 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 Arq Backup

Arq 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.

Arq 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.

Arq 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 Arq 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 Arq Backup?

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

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

Arq 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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