EU Sovereignty Score
Self-hosted / open sourceERP & FinanceHeadquarters: DE

Win-CASA: sovereignty score and 8 European alternatives

Win-CASA is property management software from Software24.com GmbH of Stephanskirchen, Germany. It is aimed at managers of rental and condominium (WEG) properties, in-house portfolio managers and people starting out in the trade. The software covers contact and property records, bookkeeping, service-charge and heating-cost statements, an assistant for owners' meetings with a resolution book, document management and a built-in online portal for tenants and owners. A mobile app, CASA24, is available as well. You can choose between a local installation and a cloud app run from a data centre.

Software24.com GmbH is based in Germany, and its website names no parent company. The vendor does not state where the data centre for the cloud version is located or who operates it, so ask where your data is stored and which processing agreement applies. With a local installation the data stays on servers you control, which gives the most independence from foreign jurisdictions. For a European organisation this is a German vendor subject to EU data-protection law.

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Sovereignty score
80 / 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-380
    Closed source, but self-hostable: encryption keys and runtime under your own control
  • Freedom from lock-in SOV-640
    Closed source: switching requires data migration
  • Source & runtime sovereignty SOV-4 · SOV-680
    Closed source, but self-hostable on your own infrastructure

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
DE (EU)Verified by hand
Data hosting
Self-hosted, e.g. in EU (your choice)Verified by hand
Open-source
NoVerified by hand
GDPR-compliant
NoVendor-stated
Category
ERP & Finance
Type
Product
Website
software24.com ↗

How we verify · Something wrong? Suggest a correction

Top EU-based & GDPR-compliant alternatives to Win-CASA

The European alternatives to Win-CASA come from our knowledge base of over 9,200 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

333 European ERP & Finance 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 Win-CASA

Win-CASA is headquartered in DE and therefore falls under European law: the GDPR, NIS2 and the Data Act. No foreign legislation can compel access to your data.

Win-CASA runs on infrastructure you choose and control yourself. You decide where the data lives, including fully within the EU if you want — this is not a fixed hosting choice made by the vendor.

Win-CASA is closed source, but you run the software yourself on your own infrastructure. The encryption keys and the runtime therefore stay under your own control, though you cannot audit or modify the source code. Ask about export options and open standards to limit software-level lock-in.

What this means for your organisation depends on your whole stack and context. The free assessment weighs Win-CASA 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 Win-CASA?

It depends on your use case. Strong EU alternatives to Win-CASA include 24SevenOffice, A3ERP and Abacus. On this page you can compare 8 EU alternatives by jurisdiction, data residency and open-source status.

Are there open-source alternatives to Win-CASA?

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

Is Win-CASA GDPR-compliant and where is the data hosted?

Win-CASA is headquartered in DE (EU) and hosts data in EU. That makes Win-CASA 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 ERP & Finance

ERP & Finance: Enterprise resource planning, accounting, financial 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.

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8 European alternatives to Win-CASA — GDPR-compliant & EU-hosted · EU Sovereignty Score