EU Sovereignty Score
Self-hosted / open sourceNetwork & Firewall ManagementHeadquarters: FR

ALCASAR: sovereignty score and 8 European alternatives

ALCASAR is a free network access controller (NAC) built as a captive portal. It authenticates users on public, corporate or home networks regardless of their device, and filters access per user or group by network protocol, domain name, URL and IP address. It also provides an HTTP antivirus, time windows, download and bandwidth limits, and logging. It is used in settings such as schools, libraries, companies and town halls. You install it on a virtual machine or a mini-PC with two network cards.

ALCASAR is an independent French project under the GNU GPLv3. Its development team is led by two developers and includes a community of developers, testers and writers on a forum. No legal entity or hosted service is mentioned. Because you run the software on your own infrastructure, authentication data and logs stay inside your own network. According to the project site, the logging helps network managers in France comply with the law, and ALCASAR is compatible with the European WiFi4EU initiative. It is also listed in the Comptoir du Libre catalogue.

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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
FR (EU)Verified by hand
Sovereignty model
Open-source, distributedVerified by hand
Data hosting
EUVerified by hand
Open-source
YesVerified by hand
GDPR-compliant
YesVendor-stated
Category
Network & Firewall Management
Type
Product
Website
alcasar.net ↗

How we verify · Something wrong? Suggest a correction

Top EU-based & GDPR-compliant alternatives to ALCASAR

The European alternatives to ALCASAR 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

62 European Network & Firewall Management 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 ALCASAR

ALCASAR is headquartered in FR 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 ALCASAR scores best on data residency.

ALCASAR 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 ALCASAR 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 ALCASAR?

It depends on your use case. Strong EU alternatives to ALCASAR include Accelleran, ADTRAN Networks (ADVA) and Alcatel-Lucent Enterprise. On this page you can compare 8 EU alternatives by jurisdiction, data residency and open-source status.

Are there open-source alternatives to ALCASAR?

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

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

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

Cyber Resilience Act

Public signals that relate to the EU Cyber Resilience Act. They do not count towards the score. A missing line means "not found publicly".

We found none of these signals on the vendor's own site when we checked.

For products in scope of the CRA, CE marking is required from 11 December 2027; this cannot be checked yet.

Checked on October 14, 2026. What is the Cyber Resilience Act?

In the changelog

Earlier changes to this page, as listed in the public changelog.

Digital sovereignty in Network & Firewall Management

Network & Firewall Management: Central management of firewalls, switches and Wi-Fi, network access control (NAC), load balancing and DNS/DHCP/IPAM. 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 ALCASAR — GDPR-compliant & EU-hosted · EU Sovereignty Score