For a UK business of 10 to 250 staff that wants one platform for calls, video and messaging, the four names that come up most are RingCentral, 8x8, Vonage and Microsoft Teams Phone. Published UK list prices run from £7.70 to £25 per user per month before VAT, but those figures cover different things. Teams Phone is the natural pick if your staff already live in Microsoft Teams, while RingCentral, 8x8 and Vonage give you a single app with desk phone and mobile support out of the box.
Which unified communications platforms combine voice, video and messaging
All four platforms put business calling, video meetings and chat in one place, and all four support desk phones as well as mobile and desktop apps. The difference is where they start from.
RingCentral's UK feature page describes presence status that works whether you are on your desk phone, the mobile app or a softphone, plus Call Flip to move a live call between those devices. Vonage says its VBC mobile app lets staff use your work number on your mobile device for calls, messages and video conferences, and that you can add Yealink desk phones or bring your own. 8x8 lists phone, video, messaging and contact centre features across one platform, including busy lamp field handling on Polycom phones.
Microsoft Teams Phone adds a phone number and calling to the Teams app your staff may already use. Microsoft says it supports Calling Plans, Operator Connect or Direct Routing for the phone network side, along with Teams-certified desk phones.
UK provider Gamma takes another route. Its Horizon cloud phone system sits alongside Gamma products that give Teams a voice and a Webex service, which suits firms that want a UK telecoms provider behind whichever app they choose.
What UCaaS costs a UK business in 2026
The table below uses list prices we checked on 10 November 2026. All exclude VAT.
| Platform and plan | Published price per user per month | What to note |
|---|---|---|
| Microsoft Teams Phone Standard | £7.70, paid yearly | Needs a separate Teams licence |
| Teams Phone with domestic calling (UK) | £13.10, paid yearly | Includes 3,000 outbound domestic minutes |
| Vonage Express | £10 | Unlimited inbound calls, desktop app |
| Vonage Core | £15 | Adds unlimited outbound calls and CRM integration |
| Vonage Max | £25 | Adds mobile eSIM and a business mobile number |
| 8x8 X2 (G-Cloud 15, 0 to 99 users) | £16 | £14 at 100 to 999 users, £11 at 1,000 or more |
Microsoft lists each Teams Phone plan as an annual subscription that auto renews, and states the price does not include VAT. Vonage's UK pricing page says all prices exclude VAT unless otherwise stated. 8x8's figures come from its own G-Cloud 15 pricing document, the price list it files for UK public sector buyers. RingCentral's UK feature page we reviewed did not show a £ price, so ask for a quote sized to your user count.
Published UK UCaaS prices per user per month, excluding VAT
List price per user per month for each plan as published by the vendor, checked on 10 November 2026. The 8x8 figure is its G-Cloud 15 rate for 0 to 99 users.
View the data
| Category | £ per user per month |
|---|---|
| Teams Phone Standard | £7.70 |
| Vonage Express | £10.00 |
| Teams Phone with UK calling | £13.10 |
| Vonage Core | £15.00 |
| 8x8 X2 | £16.00 |
| Vonage Max | £25.00 |
A per user per month price does not tell you the contract term. Ask each provider whether you can pay monthly on a rolling basis, or whether the monthly figure is part of an annual or multi-year commitment.
Hidden costs beyond the licence
The licence is rarely the whole bill. 8x8's G-Cloud document is useful here because it prices everything in one place. Desk phones start at £68.15 for a Yealink SIP-T33G and run to £239.71 for a Yealink SIP-T58W. Phone installation is listed at £15 per extension, a site survey with network assessment at £800, and an end user remote training session at £320.
What a desk phone costs from 8x8's UK price list
Per device price for selected desk phones in 8x8's G-Cloud 15 pricing document, January 2026.
View the data
| Category | £ per device |
|---|---|
| Yealink SIP-T33G | £68.15 |
| Poly Edge E100 | £68.61 |
| Yealink SIP-T54W | £145.64 |
| Poly Edge E450 | £193.44 |
| Yealink SIP-T58W | £239.71 |
The same document lists optional add-ons such as UC Speech Analytics at £7.48 and UC Quality Management at £3.74. Other providers price these items differently, but every quote should cover the same list: licences, a calling plan, number porting, handsets or headsets, set-up, training and ongoing support.
Desk phones, mobile apps and the 2027 switch-off
Many small firms are buying now because the old copper phone network is closing. Ofcom says BT plans to retire its old landline network by 31 January 2027, and that digital landlines need mains power and will not work in a power cut without battery back-up.
The government's guidance for business owners says communications providers are advising all business customers to migrate at the earliest opportunity. It lists analogue phones, alarms, payment terminals, lifts and intercoms as devices that may rely on the old network. Over two thirds of UK landlines have already moved to VoIP, the same page says.
Before you sign, ask each provider how it will port your numbers, what happens to fax lines and alarm diallers, and how staff call 999 if the power or broadband fails. A mobile app on every phone is a practical back-up for most teams.
AI call analytics, recording and UK GDPR
AI features are now standard in sales pitches, so check what is in the plan you are buying. 8x8, for example, notes that sentiment and topic insights in its agent workspace require its Speech Analytics add-on or an X8 licence. Treat transcription, call summaries, recording and analytics as separate line items until the quote says otherwise.
Recording calls brings UK GDPR duties. The ICO's guidance on monitoring workers says it is not usually proportionate to monitor or record the content of calls in all cases. You must tell callers you are recording and why, and a recorded message is good practice. Itemised call records may meet the need without recording content at all.
Data location matters too. Zoom, whose Zoom Phone is another option worth a quote, offers dedicated UK infrastructure for UK Education and Enterprise customers covering products including Phone, with stated exceptions. Ask every shortlisted provider where recordings, voicemail and transcripts are stored.
How to choose the right platform for your firm
Start with where your people already work. If the business runs on Microsoft 365 and Teams, Teams Phone keeps calling inside the app they use all day, and a provider such as Gamma or 8x8 can supply the phone network behind it. If you want one vendor for phone, video and chat with its own app, RingCentral, 8x8 and Vonage are all built for that.
Then compare like for like. Ask for a quote for the same user mix, including desk phone users, mobile-only users and any contact centre seats. Ask who will handle the migration, who owns a fault when a handset or broadband line fails, and what UK support hours are included. A short free trial with a small team, where offered, will tell you more than a demo.
Sources
- Microsoft, Microsoft Teams Phone plans and pricing, 2026
- Vonage UK, Business phone plans, 2026
- Vonage UK, Unified communications, 2026
- 8x8, G-Cloud 15 pricing document, 2026
- 8x8, Product features, 2026
- RingCentral UK, Business phone system features, 2026
- Gamma, Horizon cloud phone system, 2026
- Ofcom, Your landline is going digital, 2026
- GOV.UK, Moving landlines to digital technologies, 2026
- ICO, Monitoring workers, specific considerations, 2026
- Zoom, UK Infrastructure Fact Sheet, April 2026
