Non-EU vendorTelephony & VoIPHeadquarters: GB

Gamma Communications: sovereignty score and 8 European alternatives

Gamma Communications is a UK provider of business telecoms, offering cloud telephony, unified communications and SIP trunking. Its Horizon Cloud Phone System is presented as the company's main communications platform, alongside Gamma Connect, Microsoft Teams Phone and Webex for Gamma. The services are sold to businesses of different sizes. The website addresses customers in the United Kingdom, with a UK phone number and a UK country selector.

Gamma Communications plc is a UK company, and its investor relations page states a Main Market listing from May 2025. No majority owner is named. Being based in the UK, the company is outside the EU, so for European customers the transfer arrangements for personal data and the hosting locations matter. The website does not state where data is hosted or which data-protection terms apply. Customers that process personal data from the EU should check these points in the contract before signing.

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Sovereignty score

32 / 1000 = high exposure
100 = sovereign

Jurisdiction SOV-250
Headquartered outside the EU (GB)
Data residency SOV-30
No hosting in Europe (OTHER)
Cryptographic key sovereignty SOV-340
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-630
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	GB (OTHER)Verified by hand
EU adequacy decision	Yes — found adequate by the European CommissionVerified by hand
Sovereignty model	Vendor-hosted (non-EU)Verified by hand
Data hosting	OTHERVerified by hand
Open-source	NoVerified by hand
GDPR-compliant	NoVendor-stated
Category	Telephony & VoIP
Type	Product
Website	gammagroup.co ↗

How we verify · Something wrong? Suggest a correction

Top EU-based & GDPR-compliant alternatives to Gamma Communications

The European alternatives to Gamma Communications 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 Gamma Communications

Gamma Communications is headquartered in GB, outside the EU. Contracts and data therefore also fall under non-European law. The GDPR applies through contractual terms, but in a conflict with local legislation you have less certainty than with a European vendor.

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

Gamma Communications 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 Gamma Communications 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 Gamma Communications?

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

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

Is Gamma Communications GDPR-compliant and where is the data hosted?

Gamma Communications is headquartered in GB (OTHER) and hosts data in OTHER. Its GDPR compliance is limited or unclear. 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.

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