EU Sovereignty Score
Self-hosted / open sourceCompliance & GRCHeadquarters: LU

Mercator: sovereignty score and 8 European alternatives

Mercator is an open-source web application for mapping an organisation's information system. It is based on the mapping guide of the French cybersecurity agency ANSSI and is aimed at CISOs, IT managers and technical teams. According to its developer, the map covers seven views, from supplier contracts and the GDPR register of processing activities down to physical infrastructure. Mercator offers reports, export to Excel, CSV and PDF, a REST API and role-based access with LDAP or Active Directory authentication. You install it yourself, for example with Docker.

Mercator is maintained by Sourcentis, a limited-liability company in Luxembourg that also offers professional support and custom development. The source code is on GitHub under the GPL-3.0 licence. Sourcentis states that it offers no cloud service for Mercator: the software runs on your own infrastructure and no data goes to the developer. That suits organisations that want to keep information-system data within Europe and without an external SaaS provider. The project also appears in French public-sector free-software catalogues.

See the 8 European alternatives ↓Assess your stack with Mercator pre-selected
MastodonLinkedInBlueskyXEmail
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
LU (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
Compliance & GRC
Type
Product
Website
sourcentis.com ↗

How we verify · Something wrong? Suggest a correction

Top EU-based & GDPR-compliant alternatives to Mercator

The European alternatives to Mercator 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

63 European Compliance & GRC vendors are in the catalogue. View the whole category · Submit an alternative · View category on the map

Is Mercator one of many dependencies?

Score your whole stack in about three minutes. Free, no account needed.

Assess your stack →View a sample report (opens in a new tab)

Why digital sovereignty matters with Mercator

Mercator is headquartered in LU 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 Mercator scores best on data residency.

Mercator 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 Mercator 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 Mercator?

It depends on your use case. Strong EU alternatives to Mercator include 2B Advice PrIME, Actecil and Adherent. On this page you can compare 8 EU alternatives by jurisdiction, data residency and open-source status.

Are there open-source alternatives to Mercator?

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

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

Mercator is headquartered in LU (EU) and hosts data in EU. It is also open-source, so you can self-host it. That makes Mercator 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 Compliance & GRC

Compliance & GRC: Governance, risk management, compliance, privacy management and cookie consent. 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

See all →
Open in the alternatives dashboardMissing a vendor? Submit itAre you this vendor? You can also become a sponsor on the Compliance & GRC page — with no effect on your score
8 European alternatives to Mercator — GDPR-compliant & EU-hosted · EU Sovereignty Score