EU Sovereignty Score
Self-hosted / open sourceGIS & GeospatialHeadquarters: EU

mviewer: sovereignty score and 8 European alternatives

mviewer is a thematic map viewer that runs in the browser and is built on OpenLayers and Bootstrap. Organisations use it to publish maps, thematic layers and geographic applications on their own website. The project began as a mapping application of the French region of Brittany, which developed it under the name Kartenn. mviewer is installed as server software on your own infrastructure; the project site describes the installation as quick and easy.

The source code has been freely reusable since 2014 and is under the GPL-3.0. According to the project site, mviewer is developed by a community of developers and users, with the Brittany Region as its initiator; no separate legal entity is mentioned. The project lives in the mviewer GitHub organisation, where version 4.1 appeared in March 2026. Because you host the software yourself, your map data and configuration stay with you and you do not depend on a commercial supplier.

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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
EU (EU)Verified by hand
EU adequacy decision
No — no adequacy decisionVerified by hand
Sovereignty model
Open-source, distributedVerified by hand
Data hosting
EUVerified by hand
Open-source
YesVerified by hand
GDPR-compliant
YesVendor-stated
Category
GIS & Geospatial
Type
Product
Website
mviewer.netlify.app ↗

How we verify · Something wrong? Suggest a correction

Top EU-based & GDPR-compliant alternatives to mviewer

The European alternatives to mviewer 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

75 European GIS & Geospatial 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 mviewer

mviewer is headquartered in EU 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 mviewer scores best on data residency.

mviewer 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 mviewer 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 mviewer?

It depends on your use case. Strong EU alternatives to mviewer include 3Dsurvey, 52°North and Airbus Defence & Space. On this page you can compare 8 EU alternatives by jurisdiction, data residency and open-source status.

Are there open-source alternatives to mviewer?

Yes. Open-source EU alternatives to mviewer include 52°North, Camptocamp, Clearance and CloudCompare. These keep your data fully under your own control and let you self-host if you want to.

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

mviewer is headquartered in EU (EU) and hosts data in EU. It is also open-source, so you can self-host it. That makes mviewer 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 GIS & Geospatial

GIS & Geospatial: Geographic information systems, map visualisation and spatial data analysis. 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 mviewer — GDPR-compliant & EU-hosted · EU Sovereignty Score