Best Business VoIP Providers in the UK — 2026 Comparison
Comparing the leading UK business VoIP providers on pricing, features, reliability, support, and suitability for different business types. AMVIA, RingCentral, 8x8, Vonage, and BT Cloud Voice assessed side by side.
Key Facts
UK Business VoIP Providers — Feature Comparison
Key features, pricing indicators, and contract terms for leading UK business VoIP providers. Assessed for SME suitability.
| Feature | AMVIA VoIPManaged UK SME serviceRecommended | RingCentralGlobal UCaaS platform | 8x8Cloud communications | Vonage BusinessCloud comms platform | BT Cloud VoiceBT's hosted telephony |
|---|---|---|---|---|---|
| Unlimited UK calls included | |||||
| Microsoft Teams integration (Direct Routing) | |||||
| Auto-attendant & IVR | |||||
| Call recording included | Add-on | Add-on | Add-on | ||
| Mobile softphone app | |||||
| Number porting managed | |||||
| UK-based customer support | |||||
| Dedicated account manager | enterprise only | enterprise only | enterprise only | business accounts | |
| Hardware supply & configuration | |||||
| PSTN migration support | |||||
| Bundled with managed IT service | |||||
| CRM integrations | limited | ||||
| Typical starting price (per user/mo) | From £12 | From £15 | From £12 | From £14 | From £16 |
Prices indicative as of March 2026. Actual pricing varies by contract term, user count, and feature tier. AMVIA pricing includes UK call bundle, call recording, and account management. Third-party pricing based on published list rates — volume discounts available from all providers.
Which VoIP Provider is Right for Your Business?
The best VoIP provider depends on your business size, existing technology stack, and support requirements.
Choose AMVIA if...
You want a managed VoIP service from a UK-based provider who handles the full setup, number porting, hardware, and ongoing support — and who can also manage your IT, connectivity, and cybersecurity. Best for UK SMEs wanting a single supplier and hands-on support.
Choose RingCentral or 8x8 if...
You are a larger business with global offices needing an enterprise UCaaS platform with international calling bundles, advanced analytics, and deep CRM integrations. Both are strong platforms but less focused on the SME managed service model.
Choose BT Cloud Voice if...
You have an existing BT relationship and prefer to consolidate telephony with your connectivity provider. BT Cloud Voice is a capable hosted telephony product, though Teams integration and account management responsiveness may be more limited compared to specialist providers.
VoIP vs Traditional Phone Systems — Cost Comparison
A traditional on-premises PBX system for a 20-user business typically requires £5,000–£15,000 in hardware and installation, plus annual maintenance costs and ISDN line rental. A managed VoIP service costs £12–£20 per user per month — for a 20-user business, that is £2,880–£4,800 per year, inclusive of calls, maintenance, and support. The ROI case for VoIP is strong for almost all SMEs, even before factoring in the operational benefits of flexible, cloud-based telephony.
Read our full VoIP guideThe AMVIA Recommendation
The AMVIA Recommendation
For UK SMEs wanting UK-based support, Microsoft Teams integration, and a single provider for connectivity and telephony, AMVIA VoIP is our recommendation. Larger businesses needing global PSTN replacement should consider RingCentral. If you are Microsoft-centric, Teams Phone via AMVIA's Direct Routing service offers the smoothest experience.
Get a Free VoIP Quote from AMVIAFrequently Asked Questions
Yes, when paired with adequate connectivity. Modern VoIP systems on leased lines or FTTP deliver HD voice quality with latency under 9ms. 97% of UK workers say communication impacts their daily task efficiency. VoIP outperforms traditional telephony on features, cost, and flexibility.
Direct Routing connects your Microsoft Teams environment to the PSTN via a certified Session Border Controller, enabling external calls from Teams. It provides more flexibility and often lower per-minute costs than Microsoft Calling Plans. It is ideal for businesses already using Microsoft 365.
Cloud-hosted VoIP typically costs £8-£25 per user per month depending on features. This includes calls, voicemail, mobile apps, and call recording. Most businesses save 40-60% compared to traditional PSTN costs. Microsoft Teams calling plans offer another option within the M365 ecosystem.
The PSTN switch-off is scheduled for January 2027. Around 2.4 million UK businesses still operate on PSTN or ISDN lines. FTTC broadband that relies on PSTN copper lines will also cease to function. Businesses must migrate to IP-based telephony and connectivity before the deadline.
Get a VoIP Quote from AMVIA
Tell us about your team and current phone setup — AMVIA will provide a fixed monthly price for a complete managed VoIP service, including migration, hardware, and ongoing UK-based support.
Related Resources
Microsoft Teams Direct Routing
Teams calling with PSTN connectivity
VoIP vs Traditional Landline
Compare VoIP and traditional telephony
PSTN Switch-Off Guide
What the switch-off means for your business
Business VoIP Guide
Complete guide to business VoIP in the UK