Choosing the right VoIP provider can save your business thousands each year. But with dozens of options on the UK market, knowing where to start is tough. This guide compares the 10 best VoIP providers for UK businesses in 2026 — covering pricing, features, and who each system suits best.
Whether you run a small team or a growing company, we break down every option honestly. No fluff, no hidden agendas. If you want a broader overview of VoIP basics and costs, our VoIP for small business guide is a great starting point.
What to Look for in a Business VoIP Provider
Not every VoIP system is built the same. Before comparing providers, you need to know what actually matters. Here are the key factors to weigh up.
Call quality and uptime should top your list. Look for providers that offer at least a 99.9% uptime SLA. Poor call quality will cost you clients fast.
Core features vary widely between plans. Make sure the system includes what you need from day one:
- Auto-attendant (a virtual receptionist that routes callers)
- Call recording for training and compliance
- Voicemail-to-email so you never miss a message
- Mobile and desktop apps for remote working
- Call analytics and reporting
Scalability matters if you plan to grow. Some providers charge setup fees to add users. Others let you scale up or down month by month. Ask about this before you sign anything.
UK-based support is more important than many businesses realise. When your phones go down at 9am on a Monday, you want someone in the same timezone picking up.
Pricing transparency separates good providers from frustrating ones. Watch out for hidden costs: call rates, add-on features, handset rental, or early exit fees. Always ask for an all-in price per user.
Contract length is worth checking too. Some providers lock you in for 36 months. Others offer rolling monthly agreements. Shorter contracts give you more flexibility.
Number porting lets you keep your existing business numbers when switching. Most UK providers support this, but timelines vary from 1 to 10 working days. Our SIP trunking guide covers how number porting works in more detail.
The 10 Best VoIP Providers for UK Businesses
We have tested, researched, and spoken to real users of each provider below. Here is how they stack up in 2026.
1. Hypercloud by Connection Technologies
Best for: SMEs wanting simplicity, value, and real UK support.
Hypercloud is a hosted VoIP platform built for small and mid-sized UK businesses. It strips away the complexity that plagues bigger platforms and focuses on what most teams actually need — reliable calls, easy setup, and a fair price.
Pricing: From £6/user/month
Key features:
- UK geographic and non-geographic numbers
- Auto-attendant and call queues
- Call recording included on all plans
- Mobile and desktop apps
- Microsoft Teams integration
- UK-based support with direct account manager
- No long-term contracts required
Pros: Lowest per-user cost in this list. Genuine UK support team. Simple to set up and manage. No hidden fees. Flexible monthly rolling contracts.
Cons: Less suited to enterprises with 500+ users. Fewer third-party app integrations than RingCentral. Brand is less well-known than larger providers.
If you want to learn more, see the full Hypercloud product page.
2. RingCentral
Best for: Businesses needing a feature-rich unified communications platform.
RingCentral is one of the biggest names in cloud communications worldwide. Their UK offering includes voice, video, messaging, and fax in a single platform. It is powerful, but that power comes at a higher price.
Pricing: From £12.99/user/month
Key features:
- Unlimited UK calls on most plans
- Video conferencing for up to 200 participants
- Team messaging and file sharing
- 300+ integrations (Salesforce, HubSpot, Slack)
- AI-powered call summaries and transcription
- 99.999% uptime SLA
Pros: Huge feature set. Excellent uptime guarantee. Strong integration ecosystem. Good for large distributed teams.
Cons: Expensive for small teams. The interface can feel overwhelming. Support is mainly US-based. Contract terms are often 12-24 months.
3. 8×8
Best for: Businesses with international calling needs.
8×8 offers a unified communications platform with a standout feature: unlimited calling to up to 48 countries on higher plans. If your team makes regular overseas calls, 8×8 can save serious money.
Pricing: From £12/user/month
Key features:
- Unlimited calling to 14-48 countries (plan dependent)
- Video meetings for up to 500 participants
- Call recording and analytics
- Contact centre features on higher plans
- Microsoft Teams certified integration
- 99.999% uptime SLA
Pros: Unbeatable for international calling. Strong analytics. Good video conferencing. Reliable uptime.
Cons: Per-user pricing adds up for larger teams. Setup can be complex. UK phone support is limited on lower plans. Interface has a learning curve.
4. 3CX
Best for: Businesses that want self-hosted or on-premise control.
3CX takes a different approach. Instead of a fully hosted service, it gives you software to run your own phone system — on your server or in the cloud. This appeals to IT-savvy teams that want full control.
Pricing: Free for up to 10 users; paid plans from £150/year for the system (plus SIP trunk costs)
Key features:
- Self-hosted, cloud, or on-premise deployment
- Free tier for up to 10 users
- Built-in video conferencing and live chat
- CRM integration with major platforms
- Mobile and desktop apps
- Open platform — choose your own SIP trunk provider
Pros: Free tier is genuinely useful. Full control over your system. No per-user monthly fees. Highly customisable.
Cons: Requires technical knowledge to set up and maintain. You handle your own updates and security. No built-in UK phone support — relies on partner network. You need a separate SIP trunk provider.
5. Vonage
Best for: Businesses that need API flexibility and developer tools.
Vonage offers both a standard business phone system and a powerful communications API platform. It suits companies that want to embed voice, messaging, or video into their own apps or workflows.
Pricing: From £9/user/month
Key features:
- Unified voice, messaging, and video
- Powerful API platform for custom integrations
- CRM integrations (Salesforce, HubSpot, Zoho)
- Call recording and visual voicemail
- Mobile and desktop apps
- AI virtual assistant on higher plans
Pros: Excellent API and developer tools. Competitive entry pricing. Flexible for businesses with custom needs. Good CRM integrations.
Cons: Advanced features locked behind higher plans. Some users report inconsistent call quality. Support quality varies. The business phone product and API platform can feel like separate products.
6. GoTo Connect
Best for: Small businesses that want an easy-to-use system.
GoTo Connect (formerly Jive) is the VoIP arm of the GoTo family. It focuses on simplicity and ease of setup. If your team is not tech-savvy, this is a solid pick.
Pricing: From £10/user/month
Key features:
- Drag-and-drop call flow editor
- Unlimited calls to 50+ countries on higher plans
- Video meetings for up to 250 participants
- Auto-attendant and call queues
- Hot desking support
- Mobile and desktop apps
Pros: Very easy to set up and use. Good international calling options. Clean interface. Solid video meeting tools.
Cons: Fewer integrations than competitors. Analytics could be deeper. UK-specific support is limited. The brand change from Jive has caused some confusion.
7. Dialpad
Best for: Businesses that want AI-powered communication tools.
Dialpad has bet heavily on artificial intelligence. Every plan includes real-time call transcription, AI-generated summaries, and sentiment analysis. It suits teams that value data and automation.
Pricing: From £12/user/month
Key features:
- Real-time call transcription on all plans
- AI-generated call summaries and action items
- Sentiment analysis during live calls
- Unlimited calling within the UK
- Integrations with Google Workspace and Microsoft 365
- Mobile and desktop apps
Pros: Best-in-class AI features. Real-time transcription is genuinely useful. Clean, modern interface. Good for sales and support teams.
Cons: UK support can be slow. Some AI features need training to be accurate. Higher-tier plans get expensive. Fewer traditional PBX features than competitors.
8. Microsoft Teams Phone
Best for: Businesses already using Microsoft 365.
Microsoft Teams Phone adds PSTN calling (real phone numbers) to the Teams app you may already use for chat and video. It is not a standalone VoIP product — it is an add-on to an existing Microsoft 365 subscription.
Pricing: From £7.20/user/month (requires Microsoft 365 subscription)
Key features:
- Native integration with Microsoft Teams
- Call queues and auto-attendant
- Voicemail with transcription
- Direct routing and operator connect options
- Works on any device running Teams
- Call transfer, hold, and park
Pros: Seamless if you already use Teams. Familiar interface. No extra app needed. Good value as an add-on.
Cons: Requires a Microsoft 365 licence (extra cost). Call management features are basic compared to dedicated VoIP platforms. Limited call recording without compliance add-ons. Not ideal if you do not already use Microsoft 365.
9. BT Cloud Work
Best for: Existing BT business customers wanting to bundle services.
BT Cloud Work is powered by RingCentral under the hood. It gives you a familiar UK brand with the backing of a major telecoms network. It works best if you already have BT broadband or lines.
Pricing: From £13.99/user/month
Key features:
- Powered by RingCentral technology
- Unlimited UK calls
- Video meetings and team messaging
- Mobile and desktop apps
- Integration with BT broadband and network services
- UK-based BT support
Pros: UK brand trust and support. Reliable RingCentral technology underneath. Easy bundling with other BT services. Good for businesses that prefer one supplier.
Cons: Most expensive option in this list. Fewer features than RingCentral direct at the same price. Long contract terms (often 24-36 months). Slower to adopt new features than RingCentral.
10. Gamma Horizon
Best for: Businesses buying through IT resellers or channel partners.
Gamma does not sell directly to end users. Instead, it powers VoIP services through a network of UK resellers and IT companies. Horizon is their flagship hosted phone system, used by thousands of UK businesses.
Pricing: Custom pricing through partners (typically £8-15/user/month)
Key features:
- UK-built platform on the Gamma network
- Auto-attendant and hunt groups
- Call recording available as add-on
- Mobile twinning and desktop apps
- Integrates with common CRM platforms
- Sold and supported through local IT partners
Pros: UK-built and UK-hosted. Local partner support can be excellent. Strong network reliability. Good for businesses that prefer a local IT relationship.
Cons: No direct pricing — depends on your reseller. Feature set is more traditional. Quality of support varies by partner. Interface feels dated compared to newer platforms.
VoIP Provider Comparison Table
Here is a side-by-side look at how all 10 providers compare on the key factors that matter most.
| Provider | From (per user/mo) | Min Contract | Call Recording | Mobile App | UK Support | Uptime SLA |
|---|---|---|---|---|---|---|
| Hypercloud | £6 | 1 month | ✓ Included | ✓ | ✓ | 99.9% |
| RingCentral | £12.99 | 12 months | ✓ Higher plans | ✓ | Limited | 99.999% |
| 8×8 | £12 | 12 months | ✓ Included | ✓ | Limited | 99.999% |
| 3CX | Free / £150/yr | Annual | ✓ Included | ✓ | Via partners | Self-managed |
| Vonage | £9 | 12 months | ✓ Higher plans | ✓ | ✓ | 99.999% |
| GoTo Connect | £10 | 12 months | ✓ Included | ✓ | Limited | 99.999% |
| Dialpad | £12 | 12 months | ✓ Included | ✓ | Limited | 99.99% |
| Teams Phone | £7.20 (add-on) | Monthly | Add-on | ✓ | ✓ | 99.99% |
| BT Cloud Work | £13.99 | 24 months | ✓ Higher plans | ✓ | ✓ | 99.999% |
| Gamma Horizon | Custom | 12 months | Add-on | ✓ | Via partners | 99.99% |
Not Sure Which VoIP Provider Is Right for You?
We’ll assess your needs and recommend the best-value system — whether that’s Hypercloud or another provider. Free, no-obligation consultation.
How Much Does Business VoIP Cost in the UK?
VoIP pricing in the UK falls into three broad tiers. Knowing which tier fits your business helps you budget properly and avoid overpaying.
Basic tier (£6-10 per user/month): Covers core calling features, voicemail, a mobile app, and basic call management. This tier suits small businesses and startups with straightforward needs. Hypercloud and Vonage sit in this range.
Mid-range tier (£10-15 per user/month): Adds video conferencing, integrations, call recording, and analytics. Best for growing teams that need unified communications. RingCentral, 8×8, and Dialpad fall here.
Enterprise tier (£15-25+ per user/month): Includes contact centre features, advanced AI tools, compliance recording, and dedicated account management. Best for large businesses or regulated industries.
Several factors push your cost up or down:
- Number of users — most providers offer volume discounts above 20-50 users
- International calls — bundled international minutes cost more but save money vs pay-per-minute
- Add-ons — call recording, wallboards, and CRM integrations are often extra
- Hardware — desk phones cost £50-200 each, though many teams use softphones (apps) instead
- Contract length — annual contracts are typically 10-20% cheaper than monthly billing
For a full breakdown of setup costs and savings, read our VoIP costs and setup guide.
Cloud-Hosted vs On-Premise VoIP
There are two main ways to run a business VoIP system. Each has clear trade-offs.
Cloud-hosted VoIP means the provider runs everything on their servers. You pay per user per month and access the system through apps and web portals. Updates, security, and maintenance are handled for you. This is how most modern providers work — Hypercloud, RingCentral, 8×8, and others in this guide are all cloud-hosted.
On-premise VoIP means you run the phone system software on your own server. 3CX is the main example from this list. You buy the software licence and pair it with a SIP trunk for call connectivity. You handle updates, backups, and security yourself.
Choose cloud-hosted if you want a hands-off system that works out of the box. It suits most businesses, especially those without a dedicated IT team.
Choose on-premise if you need full control over your data and configuration. It can be cheaper at scale, but it demands technical skill to manage.
For most UK small and mid-sized businesses, cloud-hosted is the right choice. It is simpler, more predictable on cost, and easier to scale.
How to Switch VoIP Providers
Switching VoIP providers does not have to be painful. A bit of planning makes the transition smooth for your team and your customers.
Step 1: Number porting. Tell your new provider which numbers you want to keep. They will handle the porting request with your old provider. In the UK, this typically takes 1-10 working days. During the port, calls are rerouted automatically — there is no downtime if it is managed correctly.
Step 2: Plan the transition. Set a go-live date and tell your team. Run the new system alongside the old one for a few days if possible. This overlap lets you test call quality and iron out any issues.
Step 3: Train your team. Most modern VoIP systems are simple enough to learn in under an hour. Focus training on the features your team will use daily: making calls, transferring, checking voicemail, and using the mobile app.
Step 4: Sort your hardware. If you use desk phones, check whether they are compatible with the new provider. Many businesses skip desk phones entirely now and use softphone apps on computers and mobiles. This saves money and simplifies the switch.
A good VoIP provider will project-manage the entire switch for you. This is something to ask about during your evaluation — it separates providers who care about service from those who just want to close a sale. For more on choosing the right small business phone system, see our dedicated guide.
Frequently Asked Questions
For small UK businesses with 1-10 users, Hypercloud by Connection Technologies offers the best value from £6/user/month. It includes call recording, a mobile app, and UK support as standard. For teams already using Microsoft 365, Teams Phone is also worth considering.
UK business VoIP typically costs between £6 and £25 per user per month. Basic plans start from £6/user, mid-range unified communications from £10-15/user, and enterprise-grade systems from £15-25/user. Hardware and international calls may cost extra.
Yes. Almost all UK VoIP providers support number porting. You can keep your existing geographic or non-geographic numbers. The porting process usually takes 1-10 working days and your new provider handles the paperwork.
Yes. Leading VoIP providers offer 99.99-99.999% uptime guarantees. With a stable internet connection of at least 100kbps per call, VoIP call quality matches or exceeds traditional landlines. Most UK businesses have already switched to VoIP.
No. You can use VoIP on any computer, smartphone, or tablet using a softphone app. If you prefer desk phones, IP phones from brands like Yealink and Poly start from about £50. A headset and a reliable internet connection are all most users need.
Each VoIP call needs about 100kbps of upload and download speed. For a team of 10 making calls at the same time, you would need about 1Mbps. Most UK business broadband connections easily handle this. A wired connection is more stable than Wi-Fi for desk-based staff.
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