Best 11 VoIP Phone Systems for Small Businesses in the UK in 2026

QUICK SUMMARY

In this article, we’ll guide you through choosing the ideal VoIP solution for UK small businesses and provide a curated list of the top 11 providers to help you make an informed decision.

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. 

Do UK VoIP Systems Support UCaaS?

Absolutely. UK VoIP systems do support UCaaS (Unified Communications as a Service). In fact, VoIP is the foundation that makes UCaaS possible.

Here’s why: VoIP handles voice calls over the internet, and UCaaS builds on that by adding features like SMS, WhatsApp messaging, intelligent call routing, CRM integrations, and real-time analytics. It brings your core communication channels into one platform, so your team can manage conversations, follow-ups, and workflows without switching tools.

A real-world example:

Let’s say you’re an insurance agency in Manchester using CloudTalk. A lead fills out a quote form on your website. Here’s what happens next:

• Your sales rep gets an instant notification and places a call through CloudTalk.
• The system automatically logs the call in your CRM (like Salesforce).
• If the lead doesn’t answer, the system sends an automated SMS follow-up.
• A manager tracks the full interaction in real time via a live dashboard.

All of that happens in a single system—no switching apps, no lost context. That’s UCaaS in action, powered by VoIP.

How We Chose the Best VoIP Phone Systems for Small Businesses in the UK

To bring you this guide, we reviewed and compared 30+ leading VoIP providers based on real feedback from 2,000+ users via platforms like G2, Capterra, and TrustRadius.

The 11 best VoIP systems were selected for their affordability, ease of use, feature set, and integration with popular CRMs—plus how well they perform in real-world UK small business environments. We also considered recent research and industry benchmarks to ensure our picks are future-ready and data-backed.

What you’ll find here:

Only providers that deliver consistent value, with clear notes on which types of UK small businesses each one suits best.

Why Trust Our Software Reviews?

For nearly a decade, we’ve helped over 30,000 professionals choose and implement smarter communication tools. We’ve tested 200+ business phone systems, analyzed 5,500+ verified user reviews, and monitored real user discussions on forums like Reddit and Quora.

In the past year alone, we’ve published 1,000+ articles—all written and reviewed by humans, for humans—to give you the most accurate, practical, and trustworthy insights available.

Learn how we keep our content integrity and our software review methodology.

Top UK VoIP Phone Systems: Side-by-Side Comparison

VoIP for small businesses in the UK offers an affordable, efficient way to manage inbound and outbound calls—boosting productivity and improving customer service without the high costs of traditional phone systems.

To simplify your search, we’ve curated a list of the best VoIP for small businesses in the UK.

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

#1 CloudTalk

CloudTalk is the best VoIP phone system for small businesses in the UK, with 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 ≈ £21 per user/month billed annually
• Essential plan: €29 ≈ £25 per user/month billed annually
• Expert plan: €49 ≈ £42 per user/month billed annually
• Custom plan: Contact our team for a tailor-made offer

Key features:

• AI Sales Dialer
• AI Voice Agents
• Conversation Intelligence (AI Call Summaries, AutomaticTranscriptions, Sentiment Analysis)
• 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: 4,4 / 5 – 1,158 reviews

What Users Are Saying:

#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: 4,5 / 5 – 326 reviews
• G2: 4 / 5 – 175 reviews

What Users Are Saying:

#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  
• 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 / 5 – 309 reviews

What Users Are Saying:

#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: 4.1 / 5 – 228 reviews
• Capterra: 4.1 / 5 – 309 reviews

What Users Are Saying:

#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: $15 ≈ £11 per user/month
• Engage Plan: $25 ≈ £18 per user/month
• Power Suite CX Plan: $75 ≈ £55 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 – 3,435 reviews
• Capterra: 4.6 / 5 – 914 reviews

What Users Are Saying:

#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 – 4,500 reviews
• Capterra: 4.2 / 5 – 560 reviews

What Users Are Saying:

#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:

Quote-based.

Key Features:

• Intelligent Call Routing
• Call Campaign
• Auto Dialer

Integrations:

• Microsoft Teams
• Salesforce
• HubSpot

Rating:

• G2: 4.4 / 5 – 1,386 reviews
• Capterra: 4.5 / 5 – 664 reviews

What Users Are Saying:

#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: £9.95 per user/month
• Unlimited Calling Plus plan: £15.50 per user/month

Key Features:

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

Integrations:

• Microsoft
• Google

Rating:

• Reviews.io: 4.6 / 5 – 951 reviews
• Trustpilot: 4.5 / 5 – 15,045 reviews

What Users Are Saying:

#9 Gamma Horizon

Horizon is a cloud phone solution offered by Gamma, one of the leading business VoIP providers that UK businesses rely on for scalable communication. 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:

Quote-based.

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: 2.4/ 5 – 68 reviews

What Users Are Saying:

#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:

Starts at €350/year ≈ £305 (up to 40 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 – 522 reviews
• Capterra: 4.4 / 5 – 462 reviews

What Users Are Saying:

#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 Center 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 – 1,038 reviews

What Users Are Saying:

6 Key Benefits of Switching to VoIP for UK Businesses

Switching to a VoIP phone system in the UK brings flexibility, cost-efficiency, and future-ready features that traditional phone setups simply can’t match. Here are the top advantages:

1. Cut Costs by Up to 75%
   With a VoIP phone system, you can reduce your communication costs by as much as 75% by cutting local and international call charges, eliminating landline rental fees, and avoiding costly PBX hardware.
2. Work From Anywhere With Full Flexibility
   Give your team the freedom to take business calls from any device—at home, in the office, or on the move.. Ideal for hybrid and remote setups.
3. Scale Instantly as You Grow
   Add or remove users, numbers, or features in minutes without calling IT. VoIP adapts to your pace—no downtime, no installation delays.
4. Work Smarter With Advanced Features
   Use voicemail-to-email, Call Routing, auto-attendants, and CRM integrations to streamline workflows and improve service quality.
5. Ensure Clear, Reliable Call Quality
   Enjoy HD audio, noise reduction, and automatic call rerouting during outages to keep your business running without interruptions.
6. Stay Ready for What’s Next
   With BT phasing out ISDN, VoIP keeps you covered. It’s a modern, cloud-based system that grows and changes with your business—no last‑minute upgrades needed.

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 System

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 Queueing: 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 dialling numbers from a pre-loaded list. Features like Smart Dialer and Power Dialer ensure agents spend more time talking to customers and less time dialling.
  
• 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.

UK telecom giants—BT, Virgin Media, and TalkTalk—are retiring copper-based PSTN and ISDN systems to make room for internet-based solutions like VoIP. And the shift is already well underway: UK businesses have the fastest adoption rate of VoIP services in Europe, with over one-third already ditching traditional phone lines.

Still, 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.