Best 11 VoIP Phone Systems for Small Businesses UK [2025]

UK businesses have the fastest adoption rate of VoIP services in Europe. Over one-third of them have already left traditional phone lines behind*. What are you still waiting for?

UK small businesses are rapidly transitioning to Voice over Internet Protocol (VoIP) systems as a modern, cost-effective communication solution. Cloud-based software has been replacing the wires and setting them free to grow.

This shift is driven by VoIP’s flexibility, scalability, and feature-rich capabilities compared to traditional systems. The migration also enables businesses to achieve cost savings of up to 75%**, making it a highly cost-effective choice.

In this article, we’ll guide you through choosing the ideal VoIP solution for UK small business and provide a curated list of top providers to help you make an informed decision.

Key Takeaways

• VoIP is a technology that enables phone calls over the Internet rather than traditional phone lines. It works by converting your voice into digital data and transmitting it online.
  
• Selecting the right VoIP system for your business involves thoughtfully evaluating features, scalability, and integration. These elements are crucial in improving operational efficiency, customer satisfaction, and long-term costs.
  
• Popular VoIP providers like CloudTalk, RingCentral, Vonage, and 8×8 stand out for their affordable pricing and robust, feature-rich solutions.

What is VoIP?

VoIP, or Voice over Internet Protocol, is a technology that lets you make phone calls over the Internet instead of using traditional phone lines. Instead of your voice traveling through old-fashioned copper wires, it’s converted into digital data and sent online.

Because of that, you can make VoIP calls from virtually anywhere using different devices, as long as you have an internet connection. It’s a modern, flexible alternative to landlines, offering clear call quality and plenty of useful features.

Small businesses especially benefit from VoIP because it’s cost-effective, easy to scale, and packed with tools that make communication more efficient. 

The 11 Best VoIP Phone Systems for Small Businesses in the UK

VoIP phone systems provide small businesses with an affordable and efficient solution for managing inbound and outbound calls, improving productivity, and enhancing customer service.

To simplify your search, we’ve curated a list of the top 11 VoIP service providers in the UK.

#1. CloudTalk

CloudTalk is a global leader in AI-powered business-calling software specifically designed to empower sales and customer support teams. Trusted by over 4,000 forward-thinking SMBs, CloudTalk ensures crystal-clear call quality in more than 160 countries, enabling teams to have more productive and impactful conversations.

Best for: Compatible with businesses of all sizes, with a focus on growing SMBs

Pricing:

• Starter plan: €25 ≈ £20.69 per user/month billed annually
• Essential plan: €30 ≈ £24.83 per user/month billed annually
• Expert plan: €50 ≈ £41.38 per user/month billed annually
• Custom plan: Contact our team for a tailor-made offer

Key features:

• Auto Dialers – Smart Dialer and Power Dialer
• Call Monitoring
• International Numbers
• IVR and Automated Call Distribution
• Call Notes
• Call Flow Designer
• Campaigns

Key integrations:

• HubSpot
• Pipedrive
• Salesforce
• Intercom
• Zendesk
• Zoho
• Zapier

Rating:

• Capterra: 4,4 / 5 – 263 reviews
• G2: 4,3 / 5 – 1,158 reviews

“We have recently switched to CloudTalk from another phone system and the change is a breath of fresh air.We use CloudTalk for all our inbound and outbound calls on a daily basis. All call are automatically recorded and logged into our CRM, ready for us and our customer support team to refer back to should they require is great. The initial setup and the integration into our CRM was smooth, and the CloudTalk customer service team was very helpful with this.”

Ibrahim A. – (Front End Web Designer – Small-Business)

#2. RingCentral

RingCentral is a comprehensive, unified communications platform offering calls, video conferencing, and team messaging. With advanced features and integrations, it’s ideal for businesses looking to unify their communication tools under one system.

Best for: Businesses looking for an all-in-one communication solution.

Pricing:

• Essentials plan: £12.99 per user/month billed annually 
• Standard plan: £19.99 per user/month billed annually 
• Premium plan: £24.99 per user/month billed annually 
• Ultimate plan: £29.99 per user/month billed annually 

Key Features:

• Video Conferencing Tools
• Omnichannel Communication
• Customizable Analytics

Key integrations:

• HubSpot
• Salesforce
• Zendesk
• Slack

Rating:

• Capterra: 4,3 / 5 – 210 reviews
• G2: 4,0 / 5 – 979 reviews

#3. Vonage

Vonage provides a versatile communication solution that adapts to various business needs. It’s particularly valued for its flexibility, allowing businesses to tailor their system to specific requirements.

Best for: Companies with unique requirements needing tailored communication solutions.

Pricing: 

• Express plan: £10 per user/month 
• Core plan: £18 per user/month 
• Pro plan: £20 per user/month 
• Max plan: £25 per user/month 

Key Features:

• Custom API integrations.
• Ring Groups
• Single sign-on functionality

Integrations:

• HubSpot
• Salesforce
• Slack
• Microsoft Teams

Rating:

• G2: 4.3 / 5 – 465 reviews
• Capterra: 4.1 / 5 – 309 reviews

#4. 8×8

8×8 is a well-regarded communication platform with a global reach, chosen for businesses with international operations. Its scalable design ensures it can grow alongside teams of different sizes.

Best for: Businesses with a global customer base.

Pricing: 

• X2 plan: Not disclosed (used to be around £18.83 per user/month)
• X4 plan: Not disclosed (used to be around £34.52 per user/month)
• X6 plan: Not disclosed (used to be around £66.68 per user/month)
• X7 plan: Not disclosed (used to be around £86.30 per user/month)
• X8 plan: Not disclosed (used to be around £109.83 per user/month)

Key Features:

• Interactive Voice Response (IVR)
• Skills-Based Routing
• Call Center Analytics
• Call Monitoring, Barging, Whispering

Integrations:

• Salesforce
• Zendesk
• Microsoft Teams

Rating:

• G2: 4.2 / 5 – 199 reviews
• Capterra: 4.0 / 5 – 302 reviews

#5. Nextiva

Nextiva is a trusted communication platform designed to keep businesses operating in-office or remotely. Renowned for its reliability and strong customer support, it serves companies seeking a robust and efficient communication system.

Best for: Businesses that need a robust and reliable phone system that works across multiple channels.

Pricing: 

• Digital Plan: $20 ≈ £15.69 per user/month
• Core Plan: $30 ≈ £23.54 per user/month
• Engage Plan: $40 ≈ £31.38 per user/month
• Power Suite Plan: $60 ≈ £49.50 per user/month

Key Features:

• Advanced call queues
• CRM and team collaboration tools
• Auto-attendant and IVR features

Integrations:

• HubSpot
• Salesforce
• Zendesk
• Zoho

Rating:

• G2: 4.5 / 5 – 3,239 reviews
• Capterra: 4.6 / 5 – 902 reviews

#6. Dialpad

Dialpad is a communications platform with AI features that empower facing customer teams. While its entry-level pricing is appealing, many handy tools are locked behind premium tiers and add-ons. 

Best for: Teams focusing on leveraging AI for productivity and customer insights.

Pricing:

• Standard plan: £11 per user/month billed annually
• Pro plan: £20 per user/month billed annually
• Enterprise plan: Tailor-made offer

Key Features:

• AI-powered transcription and Analytics
• Integration with Google Workspace and Microsoft Teams
• Video Conferencing Tools

Integrations:

• Salesforce
• Miro
• Zendesk

Rating:

• G2: 4.4 / 5 – 1,848 reviews
• Capterra: 4.2 / 5 – 536 reviews

#7. GoTo Connect

GoTo Connect is a communication platform that combines phone, video, and messaging services into one system. It is designed to provide a centralized solution for managing business communications in an accessible way.

Best for: Small to medium-sized businesses that require a simple communication platform.

Pricing:

• Phone System plan: £18 per user/month billed annually
• Connect CX plan: £25 per user/month billed annually
• Contact Center plan: £65 per user/month billed annually

Key Features:

• Intelligent Call Routing
• Call Campaign
• Auto Dialer

Integrations:

• Microsoft Teams
• Salesforce
• HubSpot

Rating:

• G2: 4.4 / 5 – 1,286 reviews
• Capterra: 4.5 / 5 – 664 reviews

#8. bOnline

bOnline offers VoIP services in the UK tailored for startups and small businesses, providing cost-effective communication solutions with essential features.

Best for: Startups and small businesses seeking affordable VoIP services.

Pricing:

• Starter plan: £7 per user/month
• Unlimited Calling plan: £13.95 per user/month
• Unlimited Calling Plus plan: £15.50 per user/month

Key Features:

• Personalised voicemail greetings
• Voice and video conferencing
• Call flows for efficient routing

Integrations:

• Microsoft
• Google

Rating:

• Reviews.io: 3.3 / 5 – 150 reviews
• Trustpilot: 4.3 / 5 – 12,973 reviews

#9. Gamma Horizon

Horizon is a cloud phone solution from UK VoIP provider Gamma. It is a hosted VoIP solution offering a range of features tailored for businesses, including call handling, management, and integration capabilities.

Best for: Medium to large enterprises seeking a reliable and scalable VoIP solution.

Pricing:

• Standard plan: Not disclosed (used to be around £9.95 per user/month)
• Pro plan: Not disclosed (used to be around £12.95 per user/month)
• Integrated plan: Not disclosed (used to be around £15.95 per user/month)
• Unified plan: Not disclosed (used to be around £17.95 per user/month)

Key Features:

• Call Queuing 
• Receptionist Console
• Integration with CRM systems

Integrations:

• Microsoft Teams
• Salesforce
• Skype for Business

Rating:

• T2K: 4.9 / 5 – 67 reviews
• Trustpilot: 3.0 / 5 – 58 reviews

#10. 3CX

3CX is an open-platform business phone system offering on-premise or cloud-based PBX voice calling, video conferencing, text messaging, live website chat, and analytics. 

Best for: Companies of all sizes with a low volume of simultaneous calls.

Pricing:

• 3CX SMB plan: Free. Limited up to 10 users.
• 3CX PRO plan: Starts at €295 ≈ £244 up to 25 users and 8 simultaneous calls. 
• 3CX ENT plan: Starts at €370 ≈ £306 up to 25 users and 8 simultaneous calls.

Key Features:

• Unified communications with voice, video, and chat
• SMS & MMS
• Web conferencing

Integrations:

• Microsoft 365
• Salesforce
• HubSpot

Rating:

• G2: 4.4 / 5 – 466 reviews
• Capterra: 4.4 / 5 – 426 reviews

#11. NBC Cloud Voice

NBC Cloud Voice is a UK VoIP system that offers over 40 business-grade features to enhance communication efficiency. It provides a cost-effective cloud-based alternative to traditional phone lines.

Best for: Small to medium-sized businesses transitioning from landline phones.

Pricing:

• Cloud Voice Call Centre Basic plan: £9.99 per user/month
• Cloud Voice Enterprise plan: £17.99 per user/month
• Cloud Voice Complete Mobility plan: £24.99 per user/month 

Key Features:

• Mobile apps for iOS and Android
• Call Reporting
• HD video conferencing

Integrations:

• Microsoft 
• Google Workspaces 

Rating:

• Trustpilot: 4.7 / 5 – 1,008 reviews

How We Ranked These 11 Best VoIP Providers in the UK

With countless VoIP options available, finding the perfect solution for your business can feel like a heavy burden. To lighten the load for you, we’ve carefully curated this list, evaluating each provider based on the criteria that matter most to businesses:

• Reliability: We looked at how dependable each provider is when it comes to uptime and call quality. Providers with a strong track record for consistent service scored higher here.
  
• Pricing: Value for money was a big factor. We compared the costs of different plans, checked for hidden fees, and considered whether the features included were worth the price. 
  
• Features: This was about how much the provider could do for your business. We considered things like call-handling features, advanced analytics, AI-powered tools, and automated workflows. The more robust and useful the features, the better the ranking.
  
• Integrations: Having a VoIP system that plays nicely with your tech stack—like Salesforce, HubSpot, or Zendesk—makes a huge difference. Providers with seamless and varied integrations had the edge here.
  
• Reviews and Customer Support: We didn’t just take the providers’ word for it—we checked out user feedback on platforms like G2, Trustpilot, and Capterra. We also evaluated how easy it is to get help when you need it. UK business VoIP providers with high user ratings and responsive, helpful support teams came out ahead.

How to Choose the Best UK VoIP Phone System for Your Business

Truth be told, your choice of VoIP UK will significantly impact your business as it defines the way your team communicates with each other and with customers. That’s why you need to make an informed decision. Consider these important factors to make the best call for you:

• Budget: Focus on systems that fit your financial plan while offering the features you need most. Look for scalable options that adapt to your business as it grows, ensuring long-term value.
  
• Essential Features: Determine which features will benefit your operations the most. Options like Interactive Voice Response (IVR), voicemail management, and customizable call menus can streamline processes and enhance the customer experience.
  
• Scalability: Ensure the system can grow with your business, accommodating additional employees, increased call volumes, or new locations without requiring a major overhaul. Is your business only looking to serve UK customers? Keep that in mind.
  
• Integration: A system that seamlessly integrates with your existing tools—like CRMs or help desk software—can boost productivity by providing real-time access to customer data during calls.
  
• Ease of Use: Both your team and customers will benefit from a system that’s intuitive and simple to use. Avoid complex setups or confusing menus that can slow down operations and frustrate users.
  
• Reliability and Customer Support: Research user reviews to confirm the system’s reliability and the customer support quality. Frequent downtimes or technical glitches can disrupt communication and hurt your reputation.

How Much Does a VoIP Provider in the UK Cost?

VoIP providers in the UK offer pricing plans that cater to businesses of all sizes and budgets. On average, users can expect to pay between £10 to £30 per user/month for standard plans that include essential features. 

Advanced plans with additional tools, such as AI-driven analytics, CRM integrations, and video conferencing, typically range from £20 to £50 per user/month.

Key Features to Look For in a UK VoIP Phone Service

When selecting UK VoIP providers, small businesses should prioritize features that enhance communication efficiency and customer satisfaction. Here are eight essential features to consider:

• Call Queuing: Efficiently manages incoming calls by placing them in a queue when all agents are busy, ensuring no call goes unanswered and reducing customer wait times.
  
• Interactive Voice Response (IVR): Automates call routing by allowing callers to interact with a menu system, directing them to the appropriate department or agent.
  
• Auto Dialers: Streamline outbound calling by automatically dialing numbers from a pre-loaded list. Features like Smart Dialer and Power Dialer ensure agents spend more time talking to customers and less time dialing.
  
• Call Recording: Enables the recording of calls for quality assurance, training, and compliance purposes, providing a valuable resource for enhancing service quality.
  
• Voicemail and Voicemail Drop: Ensures that missed calls are captured with detailed voice messages and allows your agents to leave prospects pre-recorded messages.
  
• Call Analytics: Provides insights into call metrics such as volume, duration, and agent performance, helping businesses make data-driven decisions.
  
• CRM Integration: Connects the VoIP system with CRM software, enabling agents to access customer information during calls, enhancing personalization and efficiency.
  
• Mobile and Desktop Apps: Offers flexibility by allowing employees to make and receive calls from various devices, supporting remote work regardless of location.

Be Prepared For The “Big Switch Off”

If you don’t know what the “Big Switch Off” means, you’re not alone. Millions of Britons are unaware of the incoming death of traditional landlines scheduled for January 2027.

For those who don’t know, the UK’s leading telecom providers—BT, Virgin Media, and TalkTalk—are phasing out the old copper-based landlines. Traditional phone systems like PSTN and ISDN are being retired to make way for more modern, internet-based solutions such as VoIP systems.

For businesses, it is best to start moving as soon as possible. 77% of small and medium-sized enterprises (SMEs) have not prepared for the disruption that will be caused when the moment arrives. Migrating to VoIP will not only keep your phones ringing but also supercharge your communications. 

Thankfully, the solution to this is just one click away. Providers like CloudTalk specialize in making this transition smooth and stress-free.

Why CloudTalk Is the Smart Choice for UK Small Business

What makes CloudTalk stand out is how much you get for your money. It’s an affordable solution that doesn’t skimp on features. 

You can design your call flows, get real-time insights into how your calls are performing, and even integrate with tools you probably already use, like HubSpot and Salesforce. It’s a system built with growing SMBs in mind, ensuring your business growth becomes a natural progression.

CloudTalk helps UK businesses strengthen their local presence with a wide range of UK numbers while making it easy to scale globally. With numbers in 160+ countries and crystal-clear calls, it’s built for growth, no matter where you’re headed.

Source:

• * Snom Finds 40 Percent of UK Companies Prefer VoIP – UC Today
• ** 75 Key VoIP Statistics