EU Sovereignty Score
EU sovereignStorage & BackupHeadquarters: DE

Online Compliance Center (OCC): sovereignty score and 8 European alternatives

The Online Compliance Center (OCC) is a platform from sitaas GmbH for the data in Microsoft 365. It offers backup and restore for Exchange Online, SharePoint Online, OneDrive for Business, Teams and Entra ID, compliance archiving for statutory retention periods, data management to reduce storage costs, and eDiscovery. According to the vendor, the platform was developed in-house and includes the technology of the netmail compliance archive, which sitaas took over with the acquisition of Netmail EMEA GmbH in October 2025. It is delivered as a cloud service.

sitaas GmbH is based in Idstein, Germany, and its website names no parent company. The vendor states that data is stored exclusively in Germany, in ISO-certified data centres. It also states that the solution is based on Microsoft Azure and reads data directly through Microsoft APIs, so infrastructure of a US provider is part of the delivery chain. For a European organisation, ask which Azure regions are used, who controls the encryption keys and which sub-processors are involved.

See the 8 European alternatives ↓Assess your stack with Online Compliance Center (OCC) pre-selected
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Sovereignty score
71 / 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-360
    Key management with a European vendor
  • Freedom from lock-in SOV-640
    Closed source: switching requires data migration
  • Source & runtime sovereignty SOV-4 · SOV-655
    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 14, 2026
Headquarters
DE (EU)Verified by hand
Sovereignty model
Vendor-hosted (EU)Verified by hand
Data hosting
EUVerified by hand
Open-source
NoVerified by hand
GDPR-compliant
NoVendor-stated
Category
Storage & Backup
Type
Product
Website
online-compliance-center.com ↗

How we verify · Something wrong? Suggest a correction

Top EU-based & GDPR-compliant alternatives to Online Compliance Center (OCC)

The European alternatives to Online Compliance Center (OCC) come from our knowledge base of over 9,200 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

44 European Storage & Backup 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 Online Compliance Center (OCC)

Online Compliance Center (OCC) is headquartered in DE 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 Online Compliance Center (OCC) scores best on data residency.

Online Compliance Center (OCC) 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 Online Compliance Center (OCC) 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 Online Compliance Center (OCC)?

It depends on your use case. Strong EU alternatives to Online Compliance Center (OCC) include Acronis, Atempo and Backup ONE. On this page you can compare 8 EU alternatives by jurisdiction, data residency and open-source status.

Are there open-source alternatives to Online Compliance Center (OCC)?

Yes. Open-source EU alternatives to Online Compliance Center (OCC) include Bacula Systems, Bareos and BorgBackup. These keep your data fully under your own control and let you self-host if you want to.

Is Online Compliance Center (OCC) GDPR-compliant and where is the data hosted?

Online Compliance Center (OCC) is headquartered in DE (EU) and hosts data in EU. That makes Online Compliance Center (OCC) 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 Storage & Backup

Storage & Backup: Business storage, backup solutions, object storage 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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8 European alternatives to Online Compliance Center (OCC) — GDPR-compliant & EU-hosted · EU Sovereignty Score