EU Sovereignty Score
Non-EU vendorTelephony & VoIPHeadquarters: US

Telzio: sovereignty score and 8 European alternatives

Telzio is a cloud phone service for small businesses, healthcare practices and larger organisations. It needs no phone hardware: calls run through a web phone, a mobile app or desk phones managed from a browser-based platform. The service is delivered as a hosted software-as-a-service offering, and the website names healthcare providers and emergency services among its customers.

Telzio, Inc. operates the service. Its contact page lists Los Angeles and Copenhagen as headquarters, with Telzio Denmark A/S based in Copenhagen, and it names no parent company or owner. The company states that its infrastructure is spread across several geographical locations and availability zones, without naming countries. It also states compliance with GDPR, SOC 2 and HIPAA. As a US-headquartered provider, Telzio is subject to US legal process, including the CLOUD Act, so European organisations should confirm where data is stored and how transfers are covered in the contract.

See the 8 European alternatives ↓Assess your stack with Telzio pre-selected
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Sovereignty score
17 / 1000 = high exposure
100 = sovereign
  • Jurisdiction SOV-210
    Headquartered in the US: CLOUD Act and FISA 702
  • Data residency SOV-30
    No hosting in Europe (US)
  • Cryptographic key sovereignty SOV-320
    Key management with a non-European vendor
  • Freedom from lock-in SOV-640
    Closed source: switching requires data migration
  • Source & runtime sovereignty SOV-4 · SOV-615
    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 12, 2026
Headquarters
US (US)Verified by hand
EU adequacy decision
Only for companies individually certified under the EU-US Data Privacy FrameworkVerified by hand
Sovereignty model
Vendor-hosted (non-EU)Verified by hand
Data hosting
USVerified by hand
Open-source
NoVerified by hand
GDPR-compliant
YesVendor-stated
Category
Telephony & VoIP
Type
Product
Website
telzio.com ↗

How we verify · Something wrong? Suggest a correction

Top EU-based & GDPR-compliant alternatives to Telzio

The European alternatives to Telzio come from our knowledge base of over 8,000 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

75 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 Telzio

Telzio is headquartered in the United States. US vendors fall under the CLOUD Act and FISA 702: US authorities can compel access to data, even when that data sits in a European data centre. That is the core of the jurisdictional exposure in our model.

Telzio hosts data outside the EU (US). Personal data therefore leaves the EU, which requires a transfer mechanism under the GDPR and pulls the data residency score down.

Telzio 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 Telzio 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 Telzio?

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

Are there open-source alternatives to Telzio?

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

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

Telzio is headquartered in US and hosts data in US. The vendor states it is GDPR-compliant, but the data falls under non-EU jurisdiction. For full EU data residency the EU alternatives on this page usually offer more certainty.

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 12, 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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8 European alternatives to Telzio — GDPR-compliant & EU-hosted · EU Sovereignty Score