EU Sovereignty Score
EU sovereignE-signaturesHeadquarters: AT

A-Trust: sovereignty score and 8 European alternatives

A-Trust is an Austrian qualified trust service provider under eIDAS. Founded in 2000, it offers qualified electronic signatures, including through ID Austria, Handy-Signatur and xIDENTITY. For companies there are a Signatur-Box, hash signing (CSC), timestamps with long-term validation, and qualified seals for businesses and authorities, alongside signature cards and certificates for areas such as PSD2. A-Trust also supplies signatures to platforms such as Adobe Acrobat Sign and DocuSign. According to the company, it manages more than 4 million active qualified certificates and holds ISO 27001 certification.

A-Trust GmbH is headquartered in Vienna. Its German subsidiary, A-Trust Vertrauensdienste GmbH in Mönchengladbach, is wholly owned by the Austrian parent. An encyclopedic article from 2017 lists Austrian chambers, banks and companies as shareholders; that overview may be outdated. No non-European parent is named. The services are not open source. As a qualified provider, A-Trust falls under the eIDAS supervisory regime.

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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 5, 2026
Headquarters
AT (EU)Verified by hand
Sovereignty model
Vendor-hosted (EU)Verified by hand
Data hosting
EUVerified by hand
Open-source
NoVerified by hand
GDPR-compliant
YesVendor-stated
Category
E-signatures
Type
Product
Website
a-trust.at ↗

How we verify · Something wrong? Suggest a correction

Top EU-based & GDPR-compliant alternatives to A-Trust

The European alternatives to A-Trust 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

51 European E-signatures 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 A-Trust

A-Trust is headquartered in AT 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 A-Trust scores best on data residency.

A-Trust 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 A-Trust 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 A-Trust?

It depends on your use case. Strong EU alternatives to A-Trust include Agrello, Assently and Autenti. On this page you can compare 8 EU alternatives by jurisdiction, data residency and open-source status.

Are there open-source alternatives to A-Trust?

Our list of EU alternatives to A-Trust is mostly commercial options. Browse the category on the map for open-source choices.

Is A-Trust GDPR-compliant and where is the data hosted?

A-Trust is headquartered in AT (EU) and hosts data in EU. That makes A-Trust 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 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 E-signatures

E-signatures: Electronic signatures, trust services, eIDAS services. 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.

Also in this category

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8 European alternatives to A-Trust — GDPR-compliant & EU-hosted · EU Sovereignty Score