Self-hosted / open sourceOffice & ProductivityHeadquarters: GB

ZetaOffice: sovereignty score and 8 European alternatives

ZetaOffice is an office suite built on LibreOffice that runs in the browser and as a desktop application. It offers a word processor (Writer), spreadsheets (Calc) and presentations (Impress), and suits organisations that want to embed document editing or generation in their own systems. A JavaScript wrapper called zetajs lets developers control the suite in the browser. Desktop builds exist for Linux and Windows. The site describes the desktop builds and paid services as beta, and an earlier NLnet grant under the NGI Zero programme supported work on encrypted collaborative editing.

ZetaOffice was developed by allotropia in Hamburg. Since a merger announced in May 2025 the company belongs to Collabora Productivity, a UK company, and the legal notice on the allotropia site now names Collabora Productivity Germany GmbH. ZetaOffice is open source and the zetajs wrapper is under the MIT licence. You can self-host it or use the vendor's CDN, part of the paid packages; the site does not say where that CDN is hosted.

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Sovereignty score

77 / 1000 = high exposure
100 = sovereign

Jurisdiction SOV-250
Headquartered outside the EU (GB)
Data residency SOV-3100
No hosting in Europe (OTHER)
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-665
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 16, 2026

Headquarters	GB (OTHER)Verified by hand
EU adequacy decision	Yes — found adequate by the European CommissionVerified by hand
Data hosting	Self-hosted, e.g. in OTHER (your choice)Verified by hand
Open-source	YesVerified by hand
GDPR-compliant	YesVendor-stated
Category	Office & Productivity
Type	Product
Website	zetaoffice.net ↗

How we verify · Something wrong? Suggest a correction

Top EU-based & GDPR-compliant alternatives to ZetaOffice

The European alternatives to ZetaOffice come from our knowledge base of over 9,500 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

37 European Office & Productivity 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 ZetaOffice

ZetaOffice is headquartered in GB, 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.

ZetaOffice hosts data outside the EU (OTHER). Personal data therefore leaves the EU, which requires a transfer mechanism under the GDPR and pulls the data residency score down.

ZetaOffice 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 ZetaOffice 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 ZetaOffice?

It depends on your use case. Strong EU alternatives to ZetaOffice include Ashampoo Office, Calligra Suite and Craft Docs. On this page you can compare 8 EU alternatives by jurisdiction, data residency and open-source status.

Are there open-source alternatives to ZetaOffice?

Yes. Open-source EU alternatives to ZetaOffice include Calligra Suite, CryptPad, EGroupware, Euro-Office, eXo Platform and Framasoft (Framapad/Framacalc). These keep your data fully under your own control and let you self-host if you want to.

Is ZetaOffice GDPR-compliant and where is the data hosted?

ZetaOffice is headquartered in GB (OTHER) and hosts data in 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 16, 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.

57 open-source products from the NLnet programme added (October 16, 2026)

Digital sovereignty in Office & Productivity

Office & Productivity: Office software, word processing, spreadsheets and groupware. 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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