VoIP

Business VoIP and phone system providers.

12 platforms reviewed·How we test

Our rankings

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1TOP PICK

VoIPstudioSponsoredUK-based, contract-free cloud PBX with the broadest feature set at its price point — and one of the very few phone platforms with a real REST API, webhooks and a native MCP server.

4.5/ 5

2

Microsoft Teams PhoneThe obvious phone system if you already live in Microsoft 365 — cheap on paper, with the real cost hiding in licence stacking and the PSTN route you choose.

3.9/ 5

3

RingoverFrench-built cloud phone with unlimited calling to 110 destinations and all data hosted in France — the EU-sovereign pick, on a 12-month commitment.

3.8/ 5

4

Vonage Business CommunicationsCheapest published UK entry price and a unique eSIM business-mobile bundle — under an Ericsson owner still working out what to do with it.

3.7/ 5

5

Zoom PhoneThe cheapest big-brand unlimited UK calling plan, bolted onto Zoom Workplace — with no UK data-residency region and the worst Trustpilot score in this comparison.

3.6/ 5

6

8x8 X SeriesEnterprise UC and contact centre on one platform with a financially backed five-nines SLA — sold on quote, on contract, and with a poor support record on Trustpilot.

3.4/ 5

7

3CXSoftware PBX licensed per simultaneous call, self-hosted or hosted by 3CX — cheap per seat at scale, sold only through partners who increasingly describe it as hard to work with.

3.3/ 5

8

FreePBX / AsteriskThe free, open-source PBX on Asterisk — total control and zero licence cost, in exchange for owning security, patching and every integration yourself.

3.2/ 5

9

Yeastar P-SeriesSMB PBX sold as appliance, software or cloud edition through channel partners — solid and well-supported in the UK, but an infrastructure product rather than a cloud-native platform.

3.0/ 5

10

AircallCRM-first cloud call centre with excellent integrations and a headline price that bears little relation to what you actually pay once minimums, annual terms and add-ons stack up.

2.8/ 5

11

RingCentral RingEXThe most feature-laden UCaaS on the market — and the one most UK buyers will pay too much for, on US-centric bundles with the worst contract reputation in this comparison.

2.6/ 5

12

Mitel MiVoice BusinessEnterprise hybrid PBX from a vendor that went through Chapter 11 in 2025 and shut its own cloud service in 2026 — the legacy option, for estates that already own it.

2.3/ 5

Related articles

Best Business VoIP and Phone Systems in 2026 (UK & EU): VoIPstudio Leads a Market Where the Headline Price Is Rarely the Real One

We compared 12 business phone platforms — hosted UCaaS and self-hosted PBX — on UK/EU pricing, contract terms, API depth and Trustpilot reputation, with hands-on notes from running six of them in production.