Self-hosted / open sourceTelephony & VoIPHeadquarters: RO

OpenSIPS: sovereignty score and 8 European alternatives

OpenSIPS is an open-source server for SIP, the protocol behind VoIP telephony, video calls and presence services. The project describes it as a SIP proxy and server for voice, video, instant messaging and other SIP extensions, and it is used by carriers, telecoms and ITSPs. The code is available under the GPL and runs on the organisation's own servers or infrastructure. The project is developed within the open-source community and has a core group of developers.

The software is maintained by OpenSIPS Solutions, a company with an office in Bucharest, Romania. The company also provides consultancy, training, support and custom development for OpenSIPS-based systems. Because the maintainer offers no SaaS service, the organisation itself decides where the software and its data run, and therefore which jurisdiction applies. For a European organisation, the source code is open to inspection and the maintainer is located in the EU; hosting and operation remain the organisation's own responsibility.

See the 8 European alternatives ↓Assess your stack with OpenSIPS pre-selected

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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 10, 2026

Headquarters	RO (EU)Verified by hand
Data hosting	Self-hosted, e.g. in EU (your choice)Verified by hand
Open-source	YesVerified by hand
GDPR-compliant	NoVendor-stated
Category	Telephony & VoIP
Type	Product
Website	opensips.org ↗

How we verify · Something wrong? Suggest a correction

Top EU-based & GDPR-compliant alternatives to OpenSIPS

The European alternatives to OpenSIPS 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 OpenSIPS

OpenSIPS is headquartered in RO 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 OpenSIPS scores best on data residency.

OpenSIPS 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 OpenSIPS 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 OpenSIPS?

It depends on your use case. Strong EU alternatives to OpenSIPS 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 OpenSIPS?

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

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

OpenSIPS is headquartered in RO (EU) and hosts data in EU. It is also open-source, so you can self-host it. That makes OpenSIPS 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 10, 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 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.

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