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Updated : September 19, 2025

The way we used to handle business phone calls doesn’t work anymore.

Locking into expensive contracts or dealing with old-fashioned desk phones feels out of place in 2025. That’s why companies are moving fast toward VoIP: a solution built for agility. Even the UK market itself is expected to surge by £3.78 billion by 2026; a clear sign businesses are done compromising.

So in this blog, we will explore why VoIP has become mission-critical, what to look for in a provider, and the best UK VoIP providers.

Understanding the Business VoIP System Landscape

The UK telecommunication market has embraced internet-based calling with remarkable speed. In the UK, outgoing landline call volumes dropped by more than 50% over the last decade, while internet calling surged across both personal and business use cases.

This trend is driven by several factors:

• Businesses demand flexible, remote-ready solutions.
• VoIP service providers in UK offer lower costs compared to landlines.
• Features like video conferencing, call analytics, and AI integration make VoIP more powerful.
• Government initiatives encourage digital transformation for enterprises.

Even residential VoIP providers in UK have gained traction as families look for economical ways to stay connected internationally.

How did We Evaluate These VoIP Providers?

Selecting a business VoIP system in the UK is not necessarily about going with the most cost-effective or aesthetically appealing provider. It is important to consider cost, usability, and value-added long term.

Here’s how we compared each of the VoIP providers on our list:

1. Pricing & Scalability

We evaluated straightforward, consistent pricing models without hidden fees. Scalable plans or starting small to grow with your team were additional considerations.

2. Feature Set

Beyond typical call forwarding or voicemail, we considered advanced features like IVR systems, AI analytics, and CRM system integrations used by data centers and modern teams.

3. Reliability and Call Quality

For any VoIP platform, its uptime and the quality of the call matter the most. We gave higher marks to those who delivered consistently clear call quality.

4. Customer Support

We looked at their responsiveness, availability, and coverage over chat, support, or email. Lastly, we considered whether the provider has support at a business-need level.

5. User Experience

A poor interface could waste hours before the call even begins. We provided higher marks for design with an easy dashboard for quick access, a straightforward setup for the call, and a minimal learning curve.

Top 13 VoIP Providers in the UK

The market is flooded with VoIP providers, but not all suit your business size, type, or needs. And investing in the wrong provider can lead to loss of money and hindrance in your business communication, which you cannot afford.

So, here are the top 13 VoIP providers in the UK for you to make an informed decision:

Disclaimer:

The providers featured in this article were carefully selected after evaluating their features, reliability, and reputation in the market. We assessed each system for its performance, ease of use, and ability to scale with growing business needs. While these options are among the best solutions, it’s important to note that this list is not exhaustive and there may be other suitable providers available. Do your own research to make sure the provider you choose meets your specific requirements and is the right fit for your business communication needs.

1. CallHippo

CallHippo is a VoIP service provider that offers local and toll-free numbers for 50+ countries, suitable for businesses of all sizes. Its highly functional features boost productivity and improve team collaboration, beating most of the VoIP providers in the UK. This is also the most affordable VoIP service provider in the UK when we look at the ROI.

Features

• Smart Switch
• Call Barging
• Auto Rotate
• Call Analytics
• Parallel Dialer
• Call Monitoring
• Sentiment Analysis
• Smart Call Forwarding

Pros

• This software has a quick and highly responsive chat support team.
• It offers a 3-minute setup process that helps in saving time and better performance.
• The platform’s clean and simple design ensures easy use for teams.

Cons

• Some users report inadequate UI that affected their overall experience with CallHippo.
• It has call connectivity issues sometimes.

Pricing

• Basic/ Free plan: $0/user/month
• Starter: $18/user/month
• Professional: $30/user/month
• Ultimate: $42/user/month

Pricing are as on 19/9/2025

Start Power Your UK Business
Communication with CallHippo!

• 13-minute setup
• 2Advanced call features
• 3Affordable pricing

2. 3CX

3CX is a flexible VoIP solution with SIP trunk support, lowering call costs and providing remote management. It offers competitive prices for businesses of all sizes, from small offices to larger enterprises. 3CX can be hosted on-premise or in the cloud, giving teams control over call routing, extensions, and reporting, while reducing hardware and maintenance costs.

Features

• Concurrent Calling
• Session Queueing
• Reporting and Dashboard
• Automatic Call Distribution
• Call Logging
• Multi-level IVR

Pros

• Intuitive interface makes setup and daily use straightforward for teams.
• Administrators can manage extensions and system settings from any location with call handling features.
• The platform ensures the system stays backed up without manual intervention.

Cons

• Exporting detailed historical call data may require additional steps or technical knowledge.
• Support response times can be slow in certain cases.

Pricing

• 3CX Pro Professional: $350 for 8 simultaneous calls
• 3CX Enterprise: $425 for 8 simultaneous calls

Pricing are as on 19/9/2025

3. Gamma Communication

Gamma Communication is a UK-based virtual landline platform that provides various communication and collaboration tools targeted to businesses of all sizes. This solution includes voicemail for missed calls, video, presence, instant messaging, and audio/video conferencing. Additionally, the platform integrates with existing Outlook and CRM services, creating a single source of communication.

Features

• Unified Communications
• Contact Centre
• Cyber Security
• PSTN Transition
• Connectivity & IoT
• Communications Intelligence
• Employee Experience
• Partner Programs
• Security Toolbox

Pros 

• Recognized for its all-in-one communication platform that improves efficiency.
• This scalable solution can accommodate any size business.
• Trusted security features ensure privacy when handling sensitive information.

Cons

• Non-technical users note that there is a learning curve associated with the interface.
• Pricing is not publicly available and requires the user to contact the provider directly for an exact amount.

Pricing

• Custom pricing based on business needs.

Pricing are as on 19/9/2025

4. bOnline 

bOnline is a UK-based VoIP provider and offers low-cost communication solutions for small businesses with plans that include unlimited minutes for inbound calls, voicemail for missed calls, and call forwarding. The platform is simple to use and offers both a mobile phone app and a desktop application.

Features

• Unlimited Inbound Calls
• Voicemail and Call Forwarding
• Call Recording
• Call Reporting
• Call Queues
• Call Forwarding
• Multi-Site Support

Pros

• The intuitive interface helps teams onboard easily.
• Great call quality supports consistent communication and productive customer interactions.
• Responsive customer support can assist you with any issues and queries.

Cons

• It offers fewer advanced features compared to other providers.
• Some users report intermittent outages.

Pricing

• Starter: £7 per user/month
• Unlimited calling: £13.95 per user/month
• Unlimited calling plus: £15.50 per user/month

Pricing are as on 19/9/2025

5. 8×8

8×8 is the best VoIP service in the UK, offering video meeting and contact center services. Their platform comes packed with features like unlimited calling to over 40 countries, video conferencing for 500 team members, and built-in integrations with tools such as Microsoft Teams and Salesforce.

Features

• Integrations with Microsoft Teams and Salesforce
• Advanced Call Analytics
• Omnichannel Routing
• Proactive Messaging
• AI-enabled Self-Service
• Agent Assist
• Visual Voicemail
• Outbound Campaigns

Pros

• 8×8 allows companies to control voice, video, and messaging all on one platform.
• The platform’s scalability makes it easy for businesses of all sizes to expand.
• Broad international support permits you to communicate in different areas.

Cons

• Higher-tier plans can be expensive, which may be a consideration for budget-conscious businesses.
• Some users have reported a learning curve with the interface, which could impact initial adoption.

Pricing 

• Connect with sales for detailed pricing plans.

Pricing are as on 19/9/2025

6. Dialpad

Dialpad provides communication services through a cloud-based service and utilizes artificial intelligence technology to deliver voice calling, video calling, and messaging. It uses apps with features such as real-time transcribing, instant read-outs of call summaries, and integration with a customer relationship management (CRM) platform.

Features

• AI-powered Real-Time Transcription
• Instant Call Summaries
• AI Live Coach Cards
• Auto Attendant
• Automatic Call Distribution (ACD)
• Call Parking

Pros

• Dialpad is aligned with employee productivity through real-time transcribing and instant read-outs of call summaries.
• Dialpad is scalable so that changes can be made quickly and easily.
• It has premium security features, including encryption and HIPAA-compliant functionality.

Cons

• Some users reported some occasional connectivity issues.
• Pricing may be more than that of some competitors, which could impact budget-friendly businesses.

Pricing

• Standard: $15/per user/per month
• Pro: $25 per user/per month
• Enterprise: Customizable

Pricing are as on 19/9/2025

7. RingCentral

RingCentral is a leading cloud communications provider offering VoIP, video conferencing, and team messaging solutions. It provides features like call forwarding, call screening, and caller ID, along with cloud PBX and answering rules. RingCentral is known for its comprehensive communication tools and scalability.

Features

• Call Forwarding
• Call Screening
• Caller ID and Voicemail
• Cloud PBX and Answering rules
• Team Messaging and Video Conferencing
• Whiteboard and Annotation

Pros

• RingCentral offers a comprehensive communication suite, enabling businesses to manage voice, video, and messaging from a single platform.
• Strong security features safeguard sensitive business communications and data.
• Extensive third-party integrations enhance the platform’s versatility and functionality.

Cons

• Pricing can be on the higher side, which may be a consideration for budget-conscious businesses.
• Some users have reported a complex setup process, which could impact initial deployment.

Pricing

• Core: $20 per user/per month
• Advanced: $25 per user/per month
• Ultra: $35 per user/month

Pricing are as on 19/9/2025

8. Vonage

Vonage offers limitless cloud-based communications tools, including VoIP, video conferencing, and team messaging. The platform combines voice, video, and messaging features with CRM integrations and analytics capabilities. Vonage also offers flexible pricing and is widely regarded for its communication platform’s capabilities.

Features

• Voice, Video, and Messaging capabilities
• CRM Integrations
• Analytics and Reporting
• On-Demand Call Recording
• VBC App Center
• Phone Number Porting
• Virtual Receptionist

Pros

• Vonage holds reliable third-party certifications, including ISO 27001 and SOC.
• Offers responsive customer support and provides various online training resources.
• Good call quality with a strong uptime guarantee (99.999%).

Cons

• Reviews from some users reported intermittent service quality interruptions.
• Additional configuration may be required for advanced features, which may affect your initial deployment.

Pricing

• Mobile: $13.99 per user/per month
• Premium: $20.99 per user/per month
• Advanced: $27.99 per user/per month

Pricing are as on 19/9/2025

9. BT Business

BT Business provides reliable coverage across the UK, secure connectivity, and scalable packages tailored to suit startups, SMEs, and large enterprises. With flexible VoIP packages and customer support, it stands as a strong choice for UK businesses seeking both mobility and reliability.

Features

• Hosted VoIP
• Secure Connectivity
• Cloud Collaboration
• Scalable Packages
• Call Management
• Unified Comms

Pros

• BT Business offers a trusted infrastructure with nationwide coverage, making it a reliable option for organizations that need dependable connectivity.
• Its scalable packages allow businesses to adjust their communication systems as they grow.
• Cloud collaboration features ensure smooth teamwork across remote workers and on-site employees.

Cons

• BT Business packages are sometimes less customizable compared to more specialized VoIP providers from the UK.
• Some users report that onboarding and support response times can be slower, particularly for smaller accounts.

Pricing

• Basic: £9.52 per month
• Connect:  £12.74 per month
• Collaborate:  £19.09 per month

Pricing are as on 19/9/2025

10. Mitel

For millions of users worldwide, Mitel is a secure and reliable source of unified communications and VOIP solutions. Mitel aims to provide scalable communications systems for cloud, on-prem, and hybrid-deployment environments. Mitel is a leader in enterprise deployments, with advanced features including integrations, contact center tools, and strong mobility features.

Features

• Active Call Distribution
• Bilingual Services
• Contact Center
• Hybrid Deployment
• Call Park
• Call Queuing
• Call Forwarding
• Hot Desking

Pros

• Mitel offers very scalable communications solutions, making it an ideal provider in the UK.
• Mitel’s hybrid deployment model gives companies the flexibility to transition to the cloud.
• The advanced mobility features that Mitel offers ensure your employees are productive wherever they may be.

Cons

• The Mitel system can be more complex to deploy and manage than small businesses can handle, given their lack of an in-house IT function.
• Mitel’s service and hardware pricing are typically higher than a lightweight VOIP alternative, which will likely not work for many entry-level start-ups.

Pricing

Pricing are as on 19/9/2025

11. Pragma

Pragma is the UK distributor of the globally trusted iPECS platform, delivering advanced communication and collaboration tools through its partner network. With a portfolio that includes cloud-hosted VoIP, collaboration platforms, analytics, and integrations, Pragma enables businesses of all sizes to streamline communication and boost productivity.

Features

• iPECS ONE
• iPECS Analytics
• Call2Teams Integration
• PCI for iPECS
• Sidekick App
• CONNECT Platform

Pros

• Pragma’s iPECS solutions provide flexibility and scalability.
• Its strong partner ecosystem ensures resellers and end-users benefit from dedicated training.
• The platform enhances collaboration with tools like iPECS ONE, enabling unified communication across any device and location.

Cons

• Businesses cannot directly purchase from Pragma, as it operates exclusively through partners.
• While ideal for SMEs, enterprises with highly complex needs may require additional customization.

Pricing

• Pricing available via partners.

Pricing are as on 19/9/2025

12. Yay

Yay.com is a UK-based cloud PBX and phone system provider that offers flexible, feature-rich communication solutions for startups, growing teams, and enterprises. Known for its pay-monthly model with no contracts, Yay.com delivers virtual numbers, mobile apps and desktop apps, IVR menus, analytics, and integrations with leading CRMs.

Feature

• Call Routing
• IVR Menus
• Mobile & Desktop Apps
• Call Recording
• CRM Integrations
• Live Call Analytics

Pros

• Businesses will find yay.com very easy to set up with its user-friendly applications.
• The customer service is fabulous, as clients frequently report that their team is responsive and helps them solve problems quickly.
• An easy-to-use online portal allows for simple management of the switchboard and other features at any time.

Cons

• Updates and features like call analytics and smart queuing will not be available until companies either change to a higher plan or subscribe to an add-on.
• As it is a cloud-based service, the call quality and reliability depend on the stability of your internet connection.

Pricing

• Core: $8.99/user/month
• Standard: $23.99/user/month
• Premium: $33.99/user/month

Pricing are as on 19/9/2025

13. Teliquo

Teliquo is a UK telecom provider offering VoIP and hosted PBX solutions designed for businesses large and small. Teliquo’s expertise lies in custom solutions, including hosted phone systems, SIP trunking, and business connectivity services. Teliquo’s point of difference is its customized support to fulfill your business needs.

Feature

• Hosted PBX
• SIP Trunking
• Bespoke Solutions
• Business Connectivity
• Call Management
• Personalized Support

Pros

• Teliquo’s customized solutions allow businesses to build a communication system.
• Its hosted PBX and SIP trunking services provide flexibility for businesses transitioning.
• Strong emphasis on personalized customer support ensures businesses receive ongoing help.

Cons

• Being a smaller provider, Teliquo may not offer the same global reach and recognition as larger VoIP companies.
• Limited scalability options could be restrictive for businesses planning major expansions.

Pricing

• Call the contact center for custom pricing on request.

Pricing are as on 19/9/2025

Top Features to Look for When Choosing a VoIP Provider in the UK

Choosing the right service provider will give a business flexibility, reduce costs, and provide advanced communication capabilities. Some features to consider are:

1. Call Management Tools

Automated features such as auto-attendant, call forwarding, and voicemail-to-email will help the business manage international calls more easily.

2. IVR (Interactive Voice Response)

IVR systems will automatically check call routing to save time and not need for human redirection.

3. Analytics and Reporting

Call metrics and detailed reports will help the business monitor performance, enhance customer support, and improve staffing.

4. Integrations

Integrate your VoIP service in UK with your CRM, helpdesk, or collaboration tools like Microsoft Teams or Slack.

5. Security and Compliance

A reliable provider should offer features like end-to-end encryption, GDPR compliance, and fraud prevention so that you can enjoy seamless communications.

6. Scalability Options

The system should make it easy to add or remove users, expand into new locations, and adjust plans as the business grows without high setup costs.

What Makes a Great UK VoIP Provider?

The best providers in the UK VoIP market provide more than just a telephony option. They provide a combination of technology and compliance, plus a consumer-friendly experience. The great UK VoIP provider does the following:

• Reliable – Provides high uptime and data centers with resilient redundancy.
• Scalable – Allows for flexible plans without dropping phone services to accommodate expansion.
• User-friendly interface – Delegates access to the side of business persons with a clean and straightforward user experience.
• Support – Consistent availability of customer support (24 hours a day, 7 days a week) using multiple means of communication such as chat, on-the-telephone, and email.
• Innovation – Use of AI, automation, and other analytics for driving customer conversations.

Quick Tip:

• Don’t just take a provider’s word for reliability; ask for their SLA (Service Level Agreement). A solid UK VoIP provider should commit to at least 99.99% uptime and back it up with penalties if they fall short.

How to Pick the Right VoIP Provider in the UK?

Selecting a VoIP provider in the UK is about finding a partner that genuinely meets your business practices. A good set-up and solution can save money, drive efficiencies within your teams, and make every touchpoint with a customer a better experience. Here’s what to look for.

1. Assess Call Quality and Reliability

If your outbound calls drop or sound bad, nothing else matters. Choose providers with guaranteed uptime (99.99% is industry standard) and the infrastructure to accommodate high call volume, in-flight, without any hiccups.

2. Understand Pricing Plans

VoIP pricing seems simple on paper, but it gets tricky fast. Some charge by user, while others are bundled. Be sure their pricing plans are clear, with no hidden fees.

3. Check Scalability Options

Your VoIP should scale as quickly as your business does. The ability to add new lines instantly or expand bandwidth without downtime will save you the headache of switching providers again and again.

4. Look for Existing Tools Integrations

The best VoIP providers in the UK plug right into your CRM, helpdesk, or collaboration tools like Microsoft Teams. This integrates tools and prevents extra work, while keeping your customer data in the place you need.

5. Assess Customer Service Quality

If the VoIP provider picks up your phone (or chat) at any time, you might have the vendor you want. Anytime support can be the difference you need to get things done quickly.

The Future of VoIP in the UK

With the historic PSTN/ISDN software shut down in 2025, internet calling is becoming the new way. This will completely transform the way we communicate within the next few years, including:

1. Transition of PSTN to VoIP

The UK is changing old phone lines by 2025, which means businesses that have not transformed will become irrelevant. The sooner you can make a plan around this transition, the better.

2. Growth of AI-Led features

Capable AI features are a growth driver of VoIP technologies. Expect to see real-time transcription features with predictive call utilization as well as AI that will augment agent productivity.

3. Rise of Unified Communications (UC)

VoIP will no longer be just “phones.” Future VoIP platforms will integrate voice, video, messaging, and collaboration into a single platform, reducing the fatigue of using multiple tools for communication.

4. Adoption of Remote and Hybrid Work

The workplace doesn’t belong to a building anymore and your PSTN doesn’t either. So, mobile VoIP apps and soft phones have quickly become must-have applications for both office and remote workers.

Conclusion

In 2025, businesses that stick to traditional landlines could fall behind. A reputable VoIP company can help reduce costs, easily scale, and use advanced AI features along with mobile conveniences.

Whether you’re a small startup looking for plans that are easy on the budget or an enterprise requiring enterprise-level security and scalability, there is something for you. You just have to act early and make an informed decision for the future, and stay ahead of your competition in this rapidly changing playing field.

FAQs

1. Can I keep my existing landline number when switching to VoIP?

Yes, most UK VoIP providers support existing number porting, allowing you to keep your current landline number and receive calls.

2. What happens to VoIP during a power cut or internet outage?

Since VoIP relies on internet connectivity, customer calls may drop during outages. However, many providers offer call forwarding to mobiles as a backup.

3. Are VoIP calls secure and GDPR-compliant?

Reputable UK VoIP vendors use encryption and comply with GDPR standards to protect sensitive business communications.

4. How much does a typical UK VoIP system cost per user?

Some VoIP providers offer free calls. Otherwise, most plans range between £7–£30 per user/month, depending on features and scale.

5. Do VoIP providers in the UK include emergency calling (999)?

Yes, most UK VoIP providers include emergency calling, but you must register your physical address for accurate location services.

6. What’s the difference between hosted VoIP and SIP trunking?

Hosted VoIP is fully managed in the cloud, while SIP trunking connects your on-premise PBX to the internet protocol for VoIP calling.

7. Can VoIP integrate with CRM and collaboration tools like Teams/Zoom?

Yes, many modern VoIP platforms integrate seamlessly with CRMs, Microsoft Teams, Zoom, and other collaboration Android apps as well as iOS apps.

8. How do I check if my internet is good enough for VoIP?

You’ll need a stable broadband connection with at least 100 kbps per call. Running a VoIP speed test is the easiest way to check.

9. What happens after PSTN switch-off in 2025?

Traditional landlines will no longer work. All UK businesses and households will need to switch to VoIP or digital alternatives.

10. Which VoIP provider is best for startups vs large enterprises in the UK?

Startups often choose affordable, easy-to-scale providers like CallHippo or bOnline. Enterprises typically prefer feature-rich platforms like RingCentral, Mitel, or Gamma Communications.

Published : September 19, 2025

Vihar Naik is a Senior Marketing Professional at CallHippo, specializing in propelling growth through impactful content and product-driven strategies. With deep expertise in virtual telephone systems, he creates resources that simplify technology and help businesses enhance communication, improve customer experience, and scale effectively.

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