11 best VoIP providers in the UK

By Aimee Bradshaw | Writer and researcher | Updated: 22 June 2020

Chances are, you’ve landed on this page because you are interested in finding a hosted VoIP phone for your business.

You’ve made a wise decision.

Did you know that VoIP solutions can save your business up to 70% on call costs?

And that’s while having the same features and functionality as a traditional on-premise system. Plus, with VoIP you can make calls on the go, support remote working, manage everything via a computer app and so much more. 

Without in-depth knowledge of the industry, choosing a VoIP phone system can seem like a daunting task. This is where we come in.

We’ve been in the industry for 15 years, and know that switching phone providers can be difficult, and setup can be time consuming – not to mention the economical impact of getting it wrong. If you have a couple of minutes, our custom-built tool can speed up the whole process for you. All you have to do is answer a few simple questions about your business to be matched to the best provider. It could be the most productive two minutes of your week!

Need to get to grips with VoIP providers first? This comprehensive guide has been compiled by our telephones systems expert, exploring the ins and outs of top-rated UK providers and VoIP products in 2020. 

What is a VoIP Phone System?

VoIP stands for Voice Over Internet Protocol and refers to the software-based technology which allows businesses to make their telephone calls using a broadband internet connection, rather than through traditional phone lines. Take a look at how it all works:

VoIP phones systems convert the sound signal of users' voices into digital data streams, which can then be sent in “packets” over the Internet.

The signal is passed through an Ethernet cable to the VoIP server or gateway, before connecting with the Internet. Investing in a VoIP Phone system means a business has the freedom to use a variety of different devices to make and receive calls, including physical IP phones, computers or laptops, and smart phones.

Once you’ve set up a VoIP phone system, get ready for cheaper domestic calls and low price per minute international calls, too.

VoIP desk phones can either be set up as a new system or integrated into an existing one.

If you’re looking to integrate business phone systems, contact your current system supplier for advice.

In this guide, we've highlighted 11 of the best VoIP phone models in the corded and DECT (cordless) phone categories. Each of them will integrate fully with a VoIP phone system.

If you've read enough, and are already sure that a VoIP telephone system is the best solution for your business, answer the quick question below. Then, simply provide us with a few brief details about your business, and the kind of phone system you're looking to implement.

It takes about thirty seconds to complete, and it's free. When you're done, you'll receive quotes from several leading VoIP telephone system suppliers. Why not give it a try?

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What is hosted VoIP?

With hosted VoIP, the infrastructure is based ‘in the cloud’ rather than on your premises. A service provider owns, manages and maintains the infrastructure in a secure data centre. You pay a monthly fee to use the service. Most businesses find hosted VoIP to be the best option as it’s so easy and low-maintenance.

VoIP Benefits

Top 11 best UK VoIP provider reviews

The following suppliers offer the best VoIP Phones available in the UK, as reviewed 14th January 2019. Read on for more information about the VoIP services and features of each supplier, and which businesses they are best suited to.

4com Plc

4Com is a successful, fast-growing company. They’ve installed thousands of business telecoms systems across the UK so far. 4Com provide hosted VoIP with UK based support, and were a finalist in the National Business Awards for the Customer Focus and Service category.

Read Review

What makes 4com’s VoIP phones stand out is their Computer Telephony Integration (CTI) system. CTI seamlessly integrates phone and computer information (such as customer records) for better call handling and customer satisfaction.

Their VoIP product is feature-rich and reliable. Any maintenance issues that do arise can be dealt with by their Bournemouth call centre, or local agents and engineers.

How 4Com VoIP systems can benefit your business:

✓ Comprehensive call reporting

✓ Computer Telephony Integration enabling instant caller information

✓ On-hold marketing messages

✓ Call recording

✓ Easy-to-use auto-attendant feature

✓ Voicemail to email functionality

✓ Easy installation and setup

✓ Excellent UK service and support

✓ Flexible for any size business, ensuring future compatibility

✓ No upfront costs

Save by Comparing VoIP Phone Systems Quotes from Leading Suppliers
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Lily Comms

A relative newcomer, Lily Comms has gone from strength to strength within the UK telecoms industry over the last ten years. They offer a broad range of services with well-priced basic plans, making them suitable for businesses of all sizes.

Read Review

Lily Comms currently supply over 2500 businesses. Their fully hosted phone systems are state-of-the-art. Horizon Unified Communications is their primary hosted VoIP product, with fixed and mobile telephony facilities via a high-speed cloud-based portal.

How Lily Comms VoIP systems can benefit your business:

✓ Reliable service with full 24/7 support, training and number porting

✓ An end-to-end single solution

✓ Powerful call handling features

✓ Virtual conference room

✓ Fixed and mobile telephony solutions

✓ Solutions for mobile and home workers

✓ Multi-language auto attendant

✓ Personal call routing

✓ Future proof and feature-rich


Vonage are a leading global provider of cloud-based communications. They have nearly two million customers globally. They offer complete flexibility, with no installation charges, line rental, excessive contractual terms, or upfront costs. Their solutions are scalable and designed for today’s flexible working environment. All you need is a broadband connection and Vonage will take care of the rest.

Vonage have a UK head office based in London. Their core packages are offered at three levels: for home and small businesses, for offices of two to 30 employees, and for medium and larger businesses.

There are over 40 call features available with Vonage, only some of which are listed below. It really is a comprehensive VoIP telephony service, built with flexible working environments in mind.

How Vonage VoIP systems can benefit your business:

✓ Full call handling features

✓ Call recording with unlimited storage

✓ Hunt groups for incoming calls

✓ Multi-device extensions

✓ Conference and group calling

✓ Choice of UK area code and number, or port existing numbers

✓ Smart working in and out of the office with Vonage’s flexible solutions

✓ App for smart mobile phones, tablets, and desktops/ laptops


Berry is the “people’s choice” when it comes to providers of VOIP systems in the UK. Its personalised service and 24/7 support has led to a bagful of awards since it started out in 2011. And its overwhelming customer satisfaction levels online show Berry’s commitment to being the ‘berry’ best.

Read Review

As well as offering VOIP services, Berry provide on-premise phone systems – plus dynamic solutions that combine the two. Its handsets look great and offer a range of impressive call reporting and recording features.

Berry provides a scalable, flexible VOIP service that integrates seamlessly with your database. It connects with your CRM tool to equip you with all the info you need to never miss a sale. And Berry’s range of collaborative tools aims to bring your team members closer together. Which means happier staff and happier customers.

How Berry VoIP systems can benefit your business:

✓ Around the clock support

✓ Collaborative features to enable team coordination

✓ Comprehensive call reporting

✓ Flexible phone system options

✓ Personal Account Manager

✓ Easy to set up

✓ Highly scalable

✓ Knows the unique challenges faced by UK businesses

✓ Simple and intuitive web and smartphone interfaces


RingCentral is a global leader in cloud communications and collaboration solutions. It has over 350,000 businesses relying on their systems worldwide, and partnerships with leading carriers, like BT. Their simple to use, featureful products enable today’s mobile and distributed workforce to communicate, collaborate, and connect from anywhere, on any device. It offers a range of packages for the UK market to suit almost any budget, with prices starting at just £7.99 per user, per month. And let’s not forget there’s the option of a 14 day trial!

Read Review

RingCentral unifies voice, video, team messaging, conferencing, online meetings, and integrated contact centre solutions. What’s more, their open platform integrates with leading business apps and is highly customisable.

Their innovative cloud-based VoIP solutions suit businesses of all sizes, from small local enterprises to multinational organisations.

How RingCentral VoIP systems can benefit your business:

✓ Connect anytime, anywhere with mobile and desktop applications

✓ Cloud phone system, video conferencing, team messaging, online fax and more

✓ One provider for all your communications

✓ Low, all-inclusive, monthly pricing starting at £7.99

✓ IVR, auto-receptionist, analytics, and over 50 other features

✓ Out-of-the-box integrations with Salesforce, Google, Microsoft and more

✓ High-quality local 24/7 customer support

✓ Robust security and reliability


With excellent customer approval ratings and free setup, installation, and support, bOnline is a small business' dream. Its new customer offer allows small businesses to benefit from unlimited VoIP for just £9 per user, per month, and make calls to a generous 36 destinations. Better still, those VoIP services are about as feature-rich as they get; virtual receptionist, call recording, and after-hours smart routing are all included as standard, while bOnline's mobile app is a pleasure to use.

bOnline's small-business focussed packages are tailormade to scale as your operations do. You'll have three packages to choose from:

  • VoIP talk (£9, discounted from £14) provides 100 minutes of calling to UK landlines and mobiles
  • VoIP talk 1200 (£13, discounted from £16) gets you 1200 minutes to UK landlines and mobiles
  • VoIP talk unlimited (£16, discounted from £18) offers… well, you can probably guess!

All plans come with a free domain and two business mails, along with full mobility across laptop, tablet, and smartphone. bOnline's VoIP phones also come equipped with more than 50 features, while an extra £3.25 to £8 per month bags you 500 minutes of calls to 50 countries. With the benefits you'll see on spend, productivity, and simplicity, it's never been more profitable to be online!

How bOnline VoIP systems can benefit your business:

✓ On-site set-up, configuration, and system changes performed by in-house engineers

✓ Completely customisable and adaptable

✓ Call recording powered by AI analytics

Affordable, friendly service that makes switching easy

✓ Mobile softphone application

✓ Simple contracts

Comprehensive CRM integration

Transparent international rates

Network Telecom

Part of Enreach, Network Telecom specialises in providing flexible, scalable solutions to businesses, and aims to make remote working seamless – which can only be appreciated at times like these. Its VoIP phone systems come with softphone functionality and integrate with your team's business mobiles, enabling them to take calls from anywhere, on any device – and even flip between devices mid-call. Plus, with an intuitively simple admin portal and CRM system integration, you'll be able to manage contacts and calls efficiently.

Network Telecom's cloud-based packages offer incredible flexibility and user-friendliness – especially in the new realms of widespread remote working.

NT Cloud PRO is Network Telecom's truly portable, fully hosted cloud phone system, which users can access from any device or browser, anywhere. Network Telecom also offers NT Cloud PBX, a feature-rich hosted PBX system.

Meanwhile, Network Telecom's sleek touchscreen desk phone, NT Multimedia, can be plugged in and used anywhere with a wifi connection. Better still, it boasts all the features of a smartphone, including free HD video calling, email access, and the ability to download apps.

How Network Telecom VoIP systems can benefit your business:

Offers three months of use for free

✓ Softphone and mobile integration mean you can take the system anywhere

✓ Sleek touchscreen desk phones are modern and intuitive

✓ Simple, easy to use portal for managing users and settings

Voicemail, on-hold marketing, presence checking, and call recording

Virtual receptionist

CRM system integration

Instant messaging and video conferencing


BT are a household name and the world’s oldest telecommunication company. They serve a range of telephony and TV services to companies worldwide. BT cover everyone from the smallest to largest of companies. They have a range of solutions from fixed lines to VoIP and managed networked IT.

BT’s cloud-based VoIP phone systems are scalable, with powerful call management features. They offer three core packages:

  • BT Cloud Phone is “plug and play” for up to nine users
  • BT Cloud Voice is more sophisticated for five users or more
  • BT One Phone Office is an integrated mobile and premises operated system for five or more users or call centres. It’s perfect if you have a mobile workforce, and lets you manage all your calls from one mobile device.

Each of BT’s hosted lines comes with an inclusive geographic number, with the option of adding more for an additional charge

If you are already utilising BT fixed lines you may find the BT VoIP a cost-effective product to consider

How BT VoIP systems can benefit your business:

✓ Choice of regional phone numbers, or virtual geographic numbers

✓ Full mobile integration, and diversion for remote working

✓ Call forwarding, routing, voicemail and three-way calling

✓ Call monitoring and recording

✓ CRM integration

✓ Cloud-based, with software-based management portal

✓ Instant messenger for employees

✓ Audio and video conferencing

Focus Group

Focus Group have grown quickly in the UK since they were founded in 2005, going from a start-up with two employees to an organisation with over 300 staff. Their portfolio of web-based products spans IT, data, and telephony, and offer combined IP PBX telephone and fully cloud-based VoIP solutions.

Focus Group’s main VoIP product is Horizon Unified Communications. With fixed and mobile telephony provided by a simple to use web portal, it’s targeted at any size of business. It can be particularly suited to multi-site operations, and those with off-site employees.

Horizon is used by those who need a ‘business continuity solution’, as they describe it, with comprehensive support to continue operating in the event of a major issue. Services can be instantly moved to a backup or diversion plan, without losing functionality or using call forwarding.

How Focus Group VoIP systems can benefit your business:

✓ Combined IP-based and PBX option

✓ Free calls between branch offices and mobile phones

✓ Shared dial plans and directories

✓ On hold, marketing messages, and call forwarding

✓ Only pay for what you use

✓ Cost effective call recording from any location

✓ “One number anywhere” for desk or mobile

✓ Choice of telephone numbers


Multi-award winning global telecoms provider 8×8 boast big brand clients worldwide, including McDonalds. Their solutions focus on various sectors including government, healthcare and education. They have over 50,000 satisfied business customers and a full UK HQ.

8×8’s main product focus is on two provisions: Virtual Office and Virtual Contact Centre for call centre operations.

Virtual Office is richly featured and mobile, with extensive analytics for improving productivity. It’s easy to use, and offers a continuous communications services no matter your location.

How 8×8 VoIP systems can benefit your business:

✓ Extension dialling, auto attendant and ring groups

✓ Call recording

✓ Internet faxing

✓ Web conferencing and video meetings

✓ Desktop and mobile applications, or feature rich IP phones

✓ Extensive CRM integration


Mitel are the fastest growing global cloud communications provider serving over 70 million customers in almost 100 countries worldwide. They have over 1,600 patents and applications with an excellent reputation for innovation. Their solutions stretch across business communications, contact centre specialisms and cloud services. They have regional offices globally, so pride themselves on ‘global reach, local touch’.

Read Review

Mitel categorise their solutions across industry and company size. They offer public and private cloud-based solutions, and combined hybrid cloud solutions for those who need it.

MiCloud is their cloud-based VoIP product, safely housed in multiple data locations to prevent downtime. Users have the same functionality in an office, in the field or working remotely. There are three industry leading packages – MiCloud Office, MiCloud Business and MiCloud Flex – to suit businesses of all sizes.

How Mitel VoIP systems can benefit your business:

✓ Complete mobile integration

✓ The same features on mobile and desktop

✓ Easily deployed and scalable

✓ Focus on the millennial generation and the tech-savvy

✓ Full CRM integration

✓ Call recording, playback, evaluation and storage

✓ Easily managed voice, IM and email from one screen

✓ Powerful business analytics

✓ Contact centre options and integrations

Top 10 VoIP Desk Phones

VoIP desk phones work with a cloud-based VoIP, or hybrid IP-PBX solution. They provide physical desk solutions – ie. not softphones – which are headset compatible. They can be used alongside other components from your VoIP phone system provider, such as smartphone applications and desktop computers.

We’ve included our top picks for entry-level, wired VoIP systems and DECT (cordless) VoIP systems below:

4 Best entry-level VoIP office phones

The selection of phones below includes basic, wired models that function a lot like conventional desk phones:

1. Grandstream GXP2200 Android desktop phone

Grandstream GXP2200

This is an inexpensive corded multimedia Android VoIP phone. It features a responsive touchscreen LCD, in addition to hard keys for functions such as mute, voicemail, hold and so on. As this phone uses an Android operating system, it enables access to popular applications, such Skype, YouTube, Facebook, Twitter, and Google Voice.

Price: £80

Overall Rating :

The Grandstream GXP2200 is a modern, feature-rich desk phone ideal for forward-thinking businesses. This VoIP phone will suit all types of organisations. Apps can be downloaded via Google Play Store, or you can create custom ones. It has a 4.3 inch touchscreen LCD.

Key features:

✓ Directory with 1000 contacts

✓ Call history holds 500 records

✓ Call transfer, forwarding and waiting

✓ HD wideband audio

2. Yealink T23GN Dual Gigabit Ethernet IP phone

Yealink T23GN

A well-priced phone with an easy-to-use interface and HD audio. Features include: call hold, mute, one touch speed dial and call forwarding. It also has local three-way conferencing, ring tone selection and import, and a local phone book with 1000 entries.

Price: £75

Overall Rating :

The Yealink T23GN is a full featured IP-PBX phone which accepts three lines, has caller display and anonymous call rejection. It’s a good all-round VoIP desk phone for any office, but especially small to medium sized businesses.

Key features:

✓ Large directory

✓ Extensive features

✓ Dual gigabit Ethernet ports

✓ 132 x 64 white backlit display

3. Polycom VVX 600

Polycom VVX 600

The Polycom VVX 600 is a more advanced VoIP desk phone option. It gives exceptional call quality and has a large, very responsive touchscreen. This corded phone supports up to 16 lines, video conferencing and playback through the use of external USB cameras. It also features HD voice technology.

Price: £215

Overall Rating :

The Polycom VVX600 is one of the most popular VoIP phones available. The bright display enables users to manage their calendars, and receive meeting and catch up reminders, all on their phone handset. This capability saves time and boosts productivity.

Key features:

✓ 4.3″ LCD touchscreen

✓ Bluetooth integration

✓ HD voice quality

✓ Dual USB ports

4. Mitel IP485G

Mitel IP485G

A general office VoIP desktop phone, the IP485G has a backlit colour display with a searchable, expanded directory. It has built in visual voicemail alongside standard transfer, conference call and on hold features.

Price: £75

Overall Rating :

The Mitel IP485G phone is ideal for an office-based professional. It has a full duplex speakerphone, visual voice and conferencing capability, and a 10/100/1000 Ethernet switch for Gigabit speed.

Key features:

✓ Eight lines

✓ Expanded call history

✓ LED indicators

✓ 480 x 272 backlit colour display

Best DECT VoIP Office Phones

VoIP DECT phones are cordless. This makes them more mobile than traditional VoIP telephones.

The most innovative phones have a wide range of features including large colour LED displays, SMS facilities, and integrated phone books. VoIP DECT phones are manufactured by many of the big telecoms companies including BT, Mitel, Siemens, Panasonic, Cisco and Gigaset.

Here’s our pick of the top five around today:

1. Panasonic KX-TGP600 DECT Phone

Panasonic KX-TGP600

The Panasonic KX-TGP600 suits small to medium sized businesses which need a more mobile desk phone. It’s a wireless VoIP DECT phone which can fit eight handsets to each base and will handle eight simultaneous calls.

Price: £85

Overall Rating :

This phone has a vivid colour screen and a long battery life. SRTP (Secure Real-Time Transport Protocol) is available for extra phone security. The phone has an excellent and extendable range.

Key features:

✓ Range of 100-200 feet

✓ Noise reduction technology

✓ 200 hours standby battery life / 11 hours talk time

✓ Repeaters available to extend connection range

2. Mitel Aastra 632 DECT Phone

Mitel Aastra 632

The Mitel 632 DECT is a hardy DECT business phone. It can be used outside, or in industrial environments. It’s perfect for factory floors and care or medical facilities, as it’s easy to clean and complies with hygiene requirements. It also has a sensor alarm and an emergency call key suited to hospitals or highly secure areas.

Price: £85

Overall Rating :

A superb quality workplace phone for both general and specialised environments. It has a colour TFT display, extensive telephone book, ambient noise filter, and a mini USB PC interface, and many more features. The Mitel 632 has all the functionality and navigation you would expect, plus the added benefit of its robust design for certain workplaces.

Key features:

✓ 12 hour talk time

✓ Man down, no movement and escape alarm

✓ Hands-free operation

✓ Compatible with high hygiene workplaces

3. Gigaset SL785 DECT phone

Gigaset SL785

The Gigaset SL785 is ideal for home and office-use. It has positive reviews for its touchscreen interface with integrated answering machine (45 minute recording capacity) and ECO DECT technology for reduced battery and power usage.

Price: £195

Overall Rating :

The slick design makes this model perfect for modern businesses and the clear display offers a number of functionality benefits. Other advantages include: directory transfer options and the ability to store multiple numbers under one directory entry.

Key features:

✓ Bluetooth enabled

✓ Base handset locator

✓ Call recording

✓ 15 hour talk time

4. Yealink W52P

Yealink W52P

With a 1.8 inch colour display and intuitive user interface, the Yealink W52P offers all the standard features you would expect including intercom, transfer, call forwarding and three-way conferencing.

Price: £90

Overall Rating :

With a 1.8” colour display and intuitive user interface. The Yealink W52P offers all the standard features you would expect including intercom, transfer, call forwarding and three-way conferencing.

Key features:

✓ Exceptional HD sound

✓ Highly scalable

✓ Up to 4 simultaneous calls

✓ Up to 5 VoIP accounts

5. Grandstream DP720 DECT IP Phone

Grandstream DP720

This is an inexpensive VoIP solution that gets the job done. Up to five phones can be attached to a single DECT hub and up to 10 SIP accounts per handset. It’s a full HD audio phone with a long range that’s perfect for small businesses or as a home phone.

Price: £50

Overall Rating :

The Grandstream DP720 is a high quality DECT wireless IP phone designed for homes and small business. It has three-way local conferencing, phonebook, and DECT authentication and encryption technology. With a modern design and high-end features, it’s a great phone for a great price.

Key features:

✓ 10 hour talk time

✓ 80 hour standby mode

✓ 300 metre outdoor range, 50 metre indoor range

✓ 5 phones per DECT base

▶ Read more: Best SIP providers UK

Benefits of VoIP for your small business

VoIP Benefits for small business

VoIP brings several benefits for your business, no matter the size. Let's take a look four ways a VoIP system can help your business grow.

1. Reduce costs

The adoption of a VoIP (Voice over Internet Protocol) telephone system for your small business can drastically reduce both your capex (capital expenditure) and opex (operational expenditure).

In other words, not only is it a great long term investment, but it will start saving you money on your calls from day one.

Providers such as One2Call offer free inter-site communication, which is hugely beneficial for your business, especially if you're looking to expand. Providers offer VoIP to UK landline calls for as little as 1p per minute.

2. Flexible and mobile communications

VoIP systems can work from any location with internet, or via a VPN (virtual private network). This makes them a great choice for if you run a smaller business, with staff who work from home. Telephone numbers can be retained and will remain directly associated with the main business office, allowing employees to use the same service.

One good example of what UK VoIP providers can offer your small business comes from Voipfone, who deliver up to 800 different extensions (per account).

These can be placed in any physical location, in the same office or internationally, and calls will be free of charge.

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3. Enable growth

VoIP offers the potential to scale up operations as your business continues to grow.

Additional ports can be easily configured and brought online to provide for an extended service, or withdrawn and taken down when you no longer need them.

This can all be achieved seamlessly without disruption or down time, ensuring that communication between your employees and customers will not suffer.

The V-Plan Business VoIP package from Vonage (from £12.25 per month) gives you unlimited dialling to UK landlines, as well as unlimited calls to Hong Kong, China, Singapore, Canada and the US. This makes it a great option if your business is looking to expand into exciting new territories.

4. Connect to the future

Studies have shown that over 45% of UK businesses were already using VoIP phone systems in 2016 and that the majority of the rest would be doing so in the near future. And with call charges of up to 50% lower than BT and other providers, it’s no wonder so many savvy small businesses in the UK are making the switch. Are you?

VoIP Phone Accessories

Some businesses choose to invest in VoIP headsets, which have a number of benefits including increased employee comfort when making long calls, freeing your hands for other tasks such as using a computer while you are on the phone and freedom of movement.

The latest models have significantly improved sound quality compared to earlier handsets. There are a number of different VoIP headphones available with prices starting from around £20 per set.

Other accessories available include conference call sound stations, and cases to protect cordless phones. There’s a wide range of suppliers of VoIP telephone hardware, so shopping around is always a good idea.

VoIP: The Verdict

As we’ve already seen, a VoIP service offers many important benefits that will help you run a more efficient, flexible business. To find out more about the costs and services available from service providers, fill in this short form and we’ll gather the most competitive prices for you – for free!

Aimee Bradshaw Writer and researcher

Aimee is Expert Market’s resident telephone systems and point of sale go-to. If she’s not writing about business products, you’ll find her daydreaming about dog walking on Dorset beaches.

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