EU Sovereignty Score
Self-hosted / open sourceCloud Storage (Personal)Headquarters: FR

Sync-in: sovereignty score and 8 European alternatives

Sync-in is a self-hostable platform for file storage, synchronisation and collaboration. It is aimed at teams and organisations that want their own workspace for files, with spaces, guests, groups and fine-grained permissions. Features include protected public links with expiry dates and passwords, WebDAV, full-text search, an activity log, comments, file locking and joint document editing with Collabora Online, OnlyOffice or Euro-Office. Sign-in can use local accounts, OIDC or LDAP, with multi-factor authentication. Desktop clients exist for Windows, macOS and Linux, plus a command-line client. Files remain readable on the server's file system.

Sync-in is a French company and an open-source project under the AGPL-3.0-or-later licence, with its source code on GitHub. The company offers support, partnerships and professional services. You install the software with Docker or npm on your own infrastructure, so your data and access rules stay under your control.

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Sovereignty score
94 / 1000 = high exposure
100 = sovereign
  • Jurisdiction SOV-2100
    Headquartered in the EU: European law applies
  • Data residency SOV-3100
    EU-only hosting
  • Cryptographic key sovereignty SOV-390
    Self-hostable: encryption keys under your own control
  • Freedom from lock-in SOV-680
    Open source: low switching costs
  • Source & runtime sovereignty SOV-4 · SOV-6100
    Source code auditable, forkable and self-hostable

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 14, 2026
Headquarters
FR (EU)Verified by hand
Data hosting
Self-hosted, e.g. in EU (your choice)Verified by hand
Open-source
YesVerified by hand
GDPR-compliant
YesVendor-stated
Category
Cloud Storage (Personal)
Type
Product
Website
sync-in.com ↗

How we verify · Something wrong? Suggest a correction

Top EU-based & GDPR-compliant alternatives to Sync-in

The European alternatives to Sync-in come from our knowledge base of over 8,400 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

30 European Cloud Storage (Personal) 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 Sync-in

Sync-in is headquartered in FR and therefore falls under European law: the GDPR, NIS2 and the Data Act. No foreign legislation can compel access to your data.

Data is hosted exclusively in the EU, so Sync-in scores best on data residency.

Sync-in is open source. You can audit the source code, self-host the software and keep the encryption keys under your own control. Switching is easier because data and software are not tied to a single party.

What this means for your organisation depends on your whole stack and context. The free assessment weighs Sync-in 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 Sync-in?

It depends on your use case. Strong EU alternatives to Sync-in include CloudMe, Cozy Cloud and Cryptee. On this page you can compare 8 EU alternatives by jurisdiction, data residency and open-source status.

Are there open-source alternatives to Sync-in?

Yes. Open-source EU alternatives to Sync-in include Cozy Cloud, Cryptee, Filen, FileSender and Internxt. These keep your data fully under your own control and let you self-host if you want to.

Is Sync-in GDPR-compliant and where is the data hosted?

Sync-in is headquartered in FR (EU) and hosts data in EU. It is also open-source, so you can self-host it. That makes Sync-in an EU-sovereign choice in its own right; the EU alternatives on this page are comparable European tools.

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 14, 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

In the changelog

Earlier changes to this page, as listed in the public changelog.

Digital sovereignty in Cloud Storage (Personal)

Cloud Storage (Personal): Personal cloud storage — sync and share files. 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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8 European alternatives to Sync-in — GDPR-compliant & EU-hosted · EU Sovereignty Score