EU Sovereignty Score
Self-hosted / open sourceCAD & EngineeringHeadquarters: AD

That Open Platform: sovereignty score and 8 European alternatives

That Open Platform is an open-source toolkit for building BIM and IFC applications for the web. It is developed by That Open Company, which describes its work as free and open-source technology for the architecture, engineering, construction and operations (AECO) sector. The source code is published on GitHub under the MIT licence, which permits use, modification and integration of the components in other software.

The legal entity behind the project is TOC Systems, SL, whose registered office is in El Tarter in Andorra. Andorra is outside the EU and the EEA, so a European organisation that relies on the company for support or contractual terms should take that jurisdiction into account. The vendor's website does not describe a hosted service for the toolkit, which is distributed as source code. An organisation can therefore run the components on its own infrastructure and keep project data and IFC models under its own control.

See the 8 European alternatives ↓Assess your stack with That Open Platform pre-selected
MastodonLinkedInBlueskyXEmail
Sovereignty score
77 / 1000 = high exposure
100 = sovereign
  • Jurisdiction SOV-250
    Headquartered outside the EU (AD)
  • 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 12, 2026
Headquarters
AD (OTHER)Verified by hand
EU adequacy decision
Yes — found adequate by the European CommissionVerified by hand
Sovereignty model
Open-source, distributedVerified by hand
Data hosting
OTHERVerified by hand
Open-source
YesVerified by hand
GDPR-compliant
NoVendor-stated
Category
CAD & Engineering
Type
Product
Website
thatopen.com ↗

How we verify · Something wrong? Suggest a correction

Top EU-based & GDPR-compliant alternatives to That Open Platform

The European alternatives to That Open Platform come from our knowledge base of over 7,800 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

88 European CAD & Engineering vendors are in the catalogue. View the whole category · Submit an alternative · View category on the map

Is That Open Platform 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 That Open Platform

That Open Platform is headquartered in AD, 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.

That Open Platform 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.

That Open Platform 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 That Open Platform 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 That Open Platform?

It depends on your use case. Strong EU alternatives to That Open Platform include ACCA software, ALLPLAN and AUCOTEC Engineering Base. On this page you can compare 8 EU alternatives by jurisdiction, data residency and open-source status.

Are there open-source alternatives to That Open Platform?

Yes. Open-source EU alternatives to That Open Platform include Blender. These keep your data fully under your own control and let you self-host if you want to.

Is That Open Platform GDPR-compliant and where is the data hosted?

That Open Platform is headquartered in AD (OTHER) and hosts data in OTHER. Its GDPR compliance is limited or unclear. 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 12, 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 CAD & Engineering

CAD & Engineering: Computer-aided design, 3D modelling and engineering simulation software. 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 CAD & Engineering page — with no effect on your score
8 European alternatives to That Open Platform — GDPR-compliant & EU-hosted · EU Sovereignty Score