EU Sovereignty Score
Non-EU vendorTelephony & VoIPHeadquarters: US

Quo (voorheen OpenPhone): sovereignty score and 8 European alternatives

Quo, formerly OpenPhone, is a business phone system for small and growing teams. It brings calls, text messages and contacts together in a shared workspace, with shared numbers, call routing, call summaries and an AI agent called Sona that answers calls when a team cannot. It runs on iOS, Android, macOS, Windows and the web and integrates with tools such as Salesforce, HubSpot and Slack.

The company behind Quo is OpenPhone Technologies, Inc., headquartered in San Francisco, California, which places it under US jurisdiction. According to its privacy policy the services are hosted and operated in the United States, and data is stored on US servers. For EU and UK residents, Quo appoints a data protection officer and EU representative in Hamburg, Germany, and states that it acts as controller for its own data and may act as processor for customer data. The policy does not name a hosting provider or a transfer mechanism, so European organisations should request the data processing terms and sub-processor information from Quo.

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 11, 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
Type
Product
Website

How we verify · Something wrong? Suggest a correction

Top EU-based & GDPR-compliant alternatives to Quo (voorheen OpenPhone)

The European alternatives to Quo (voorheen OpenPhone) 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

Is Quo (voorheen OpenPhone) one of many dependencies?

Score your whole stack in about three minutes. Free, no account needed.

Why digital sovereignty matters with Quo (voorheen OpenPhone)

Quo (voorheen OpenPhone) 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.

Quo (voorheen OpenPhone) 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.

Quo (voorheen OpenPhone) 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 Quo (voorheen OpenPhone) 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 Quo (voorheen OpenPhone)?

It depends on your use case. Strong EU alternatives to Quo (voorheen OpenPhone) 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 Quo (voorheen OpenPhone)?

Our list of EU alternatives to Quo (voorheen OpenPhone) is mostly commercial options. Browse the category on the map for open-source choices.

Is Quo (voorheen OpenPhone) GDPR-compliant and where is the data hosted?

Quo (voorheen OpenPhone) 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 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.

Also in this category

See all →
8 European alternatives to Quo (voorheen OpenPhone) — GDPR-compliant & EU-hosted · EU Sovereignty Score