EU sovereignTelephony & VoIPHeadquarters: AT

Sipwise: sovereignty score and 8 European alternatives

Sipwise is an Austrian VoIP software company. Its C5 soft switch handles SIP and XMPP traffic for voice, video, presence, messaging and WebRTC, and a Community Edition is available. The company also offers the C4 carrier soft switch, a hosted PBX for business and SME customers, a cloud communication platform and SIP trunking for carriers and businesses. Products are delivered as software for operators and as hosted services.

Sipwise GmbH has its registered seat in Vienna, so the company is established in the EU. Its imprint names Alcatel-Lucent Enterprise Holding as parent company. The controlling shareholder of that group is not documented. The company describes its RB cloud platform as developed in Europe, but its website does not state where hosted services run. Organisations that use Sipwise hosted services should confirm the data location and the processing entity, while a self-operated Community Edition keeps those choices with the operator.

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Sovereignty score

71 / 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-360
Key management with a European vendor
Freedom from lock-in SOV-640
Closed source: switching requires data migration
Source & runtime sovereignty SOV-4 · SOV-655
Closed source, runtime with the vendor

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 11, 2026

Headquarters	AT (EU)Verified by hand
Sovereignty model	Vendor-hosted (EU)Verified by hand
Data hosting	EUVerified by hand
Open-source	NoVerified by hand
GDPR-compliant	YesVendor-stated
Category	Telephony & VoIP
Type	Product
Website	sipwise.com ↗

How we verify · Something wrong? Suggest a correction

Top EU-based & GDPR-compliant alternatives to Sipwise

The European alternatives to Sipwise 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 Sipwise

Sipwise is headquartered in AT 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 Sipwise scores best on data residency.

Sipwise is closed source and hosted by the vendor. The encryption keys and the runtime sit with the vendor and switching requires data migration. Ask about bring-your-own-key, export options and open standards.

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

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

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

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

Sipwise is headquartered in AT (EU) and hosts data in EU. That makes Sipwise 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 11, 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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