EU Sovereignty Score
Self-hosted / open sourceTelephony & VoIPHeadquarters: DE

Kamailio: sovereignty score and 8 European alternatives

Kamailio is an open-source SIP server for voice, video and messaging infrastructure. It acts as a SIP registrar, proxy or redirect server and is used for tasks such as load balancing, least-cost routing, session border control, presence and instant messaging, and as a gateway between SIP and WebRTC. Kamailio is software that operators install and run themselves, from small installations to carrier-scale platforms.

Kamailio is released under the GPL version 2 or later and is developed by a community project rather than a single company. It descends from the SIP Express Router, which was started at the Fraunhofer FOKUS institute in Berlin. Because you host it yourself, call signalling and data stay wherever you deploy it, and no vendor can restrict access to the code. A European organisation can therefore build telephony platforms on infrastructure in jurisdictions of its choice, at the cost of operating and securing the system itself or buying support from third parties.

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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 July 2, 2026
Headquarters
DE (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
Hosting signal
VOZTELECOM - Gamma Operadora de Comunicaciones S.A., ES (ES)Technically measured
Category
Telephony & VoIP
Type
Product
Website
kamailio.org ↗

The hosting signal shows the network that serves the vendor's website, often a CDN, and not necessarily where the service or your data is hosted. How we verify · Something wrong? Suggest a correction

Top EU-based & GDPR-compliant alternatives to Kamailio

The European alternatives to Kamailio come from our knowledge base of over 6,800 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

66 European Telephony & VoIP 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 Kamailio

Kamailio 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.

Data is hosted exclusively in the EU, so Kamailio scores best on data residency.

Kamailio 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 Kamailio 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 Kamailio?

It depends on your use case. Strong EU alternatives to Kamailio include A1 Telekom Austria, Adversus and Auerswald. On this page you can compare 8 EU alternatives by jurisdiction, data residency and open-source status.

Are there open-source alternatives to Kamailio?

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

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

Kamailio is headquartered in DE (EU) and hosts data in EU. It is also open-source, so you can self-host it. That makes Kamailio 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 July 2, 2026.

Sources

This record was checked via the vendor's website and legal notice during the full audit of June and July 2026. Source links have been recorded per record since 20 September 2026.

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 Telephony & VoIP

Telephony & VoIP: Business telephony, VoIP platforms, CPaaS and communication APIs. 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 Kamailio — GDPR-compliant & EU-hosted · EU Sovereignty Score