Best Business VoIP Providers UK 2026: Compare Prices, Features and Phone Systems Quick answer
The best business VoIP provider depends on your company size, call volumes, working arrangements, integrations and support requirements.
Our leading UK options for 2026 are:
bOnline – best for small businesses seeking a low-cost phone systemRingCentral – best all-round unified communications provider8×8 – best for growing and multi-site organisationsBT – best for businesses wanting an established UK telecoms providerVonage – best for flexible plans and mobile-first communicationsDialpad – best for built-in AI features and call transcriptionAircall – best for sales and customer-support teamsGamma Horizon – best for businesses buying through a managed UK communications partnerZoom Phone – best for companies already using ZoomMicrosoft Teams Phone – best for organisations centred on Microsoft 365
Small-business VoIP services commonly start from approximately £7 to £15 per user per month , while more advanced unified communications and contact-centre platforms can cost £20 to £100+ per user per month .
The cheapest provider is not always the best value. Compare the complete cost of calls, licences, handsets, support, setup and contract increases before choosing.
Compare business VoIP quotes from UK providers and find a phone system matched to your requirements.
How do we work?
Transparent, impartial, and data‑driven reviews made by a team of expert humans, never AI generated – here’s exactly how Compare Your Business Costs helps you find the best deals from trusted UK providers: click here
Authored by: Ally Cox (Business Technology & B2B Services Specialist 10+ Years’ Experience)
Reviewed by: James Ward (Telecoms Specialist, 12+ Years Experience)
Last Updated: July 2026
Contents:
Best business VoIP providers compared
Which is the best VoIP provider in the UK?
How much do business VoIP providers cost?
How we selected the best VoIP providers
Best VoIP by business type
Best business VoIP providers compared
Provider Best for Published starting price Main strengths
bOnline Small businesses and sole traders
From £7 per user/month
Low pricing, simple packages, UK calls available
Less suitable for complex enterprises
RingCentral Best overall
Quote or plan dependent
Calling, messaging, video, integrations and AI tools
More functionality than some small firms need
8×8 Growing and multi-site businesses
Quote required
Unified communications, analytics and contact-centre options
Pricing is less transparent
BT Established UK businesses
From £10.52 per licence/month
Recognisable UK provider, multiple licence levels
Long contracts and scheduled price rises require scrutiny
Vonage Flexible and mobile-first businesses
From £10 per user/month
Clear plans, apps, CRM support and mobile option
Some advanced features may require higher plans
Dialpad AI-enabled communications
From £12 per user/month
Transcription, AI features and unified communications
Best value depends on using the AI functionality
Aircall Sales and support teams
Custom UK pricing
Strong CRM integrations, analytics and call coaching
Three-user minimum on standard plans
Gamma Horizon Managed UK deployments
Partner quote required
UK channel support, hosted voice and Teams options
Price and support depend partly on reseller
Zoom Phone
Zoom users
Quote or regional pricing
Phone, meetings, chat and central administration
UK pricing may not be displayed as clearly as competitors
Microsoft Teams Phone
Microsoft 365 organisations
Licence and calling model dependent
Deep Teams integration and several PSTN options
Configuration and total licensing can be complicated
Prices exclude VAT unless stated otherwise. Published prices and features were checked in July 2026 and may change.
Which is the best VoIP provider in the UK? For most businesses, there is no single provider that is best in every category.
A small company requiring five straightforward telephone licences has very different needs from a 100-person customer-service operation.
Our overall recommendations are:
Best overall: RingCentral RingCentral is our leading all-round choice for businesses seeking a mature cloud communications platform – RingEX combines:
business calling;
messaging;
video meetings;
mobile and desktop applications;
call routing;
call recording;
analytics;
business-software integrations;
AI-assisted communication features.
RingCentral supports local numbers, shared lines, auto attendants, answering rules, call logs and automatic call recording and they also promotes global deployment and a 99.999% service-level agreement for eligible services.
RingCentral is best for:
growing SMEs;
hybrid and remote teams;
multi-site businesses;
companies wanting one communications platform;
businesses requiring integrations;
organisations likely to add contact-centre tools later.
RingCentral may not suit:
sole traders wanting only one simple telephone line;
businesses that will not use messaging, meetings or integrations;
buyers focused exclusively on the lowest possible monthly fee.
Our verdict
RingCentral offers one of the strongest combinations of calling, administration, integrations and scalability.
Its breadth is the main advantage, but it can also make the platform excessive for a very small business.
Best overall business VoIP provider
Best cheap VoIP provider: bOnline bOnline is one of the clearest choices for sole traders and small UK businesses seeking affordable, straightforward VoIP and their published plans currently include:
Starter from £7 per user per month Unlimited Calling from £13.95 per user per month Unlimited Calling with a handset from £16.95 per user per month
The Starter plan includes a digital telephone line and number, unlimited inbound calls, 100 outbound landline minutes and more than 40 VoIP features.
bOnline is best for:
sole traders;
start-ups;
microbusinesses;
businesses replacing one or two landlines;
firms that want clear published prices;
companies that do not require enterprise-level administration.
bOnline isn’t great for:
large international companies;
complex contact centres;
organisations requiring highly customised integrations;
enterprises with advanced security and governance requirements.
Our verdict
bOnline is a strong value choice for small UK businesses that primarily need reliable calling and standard phone-management features.
Its packages are easier to understand than many quote-only providers, although buyers should still check contract length, fair-use terms and the complete renewal cost.
Best low-cost VoIP provider for small businesses
Best VoIP provider for growing businesses: 8×8 8×8 is suited to businesses that expect their phone requirements to become more complex.
Its platform combines:
cloud business telephony;
messaging;
video;
team collaboration;
call queues;
auto attendants;
analytics;
CRM and Microsoft Teams integration;
contact-centre services.
8×8 is best for:
expanding SMEs;
multi-site organisations;
internationally distributed teams;
businesses needing detailed analytics;
companies planning to introduce contact-centre functions;
organisations consolidating several communication tools.
8×8 is not for:
businesses wanting simple public pricing;
very small companies with minimal requirements;
buyers that prefer a highly stripped-back phone service.
Our verdict
8×8 is particularly attractive when a business needs more than basic VoIP and expects to scale across departments, sites or customer-service teams.
The main drawback is that businesses generally need to obtain a tailored quote to understand the real cost.
Best for growing and multi-site businesses
Best established UK provider: BT BT is an obvious option for businesses that prefer to purchase voice and connectivity from a familiar UK telecoms provider and their Cloud Voice service currently lists three principal licence levels:
Basic from £10.52 per month Connect from £13.74 per month Collaborate from £20.09 per month
These advertised prices are based on a 60-month licence, exclude VAT and are subject to scheduled annual increases. BT also offers Digital Voice for Business packages with different call-management features.
BT is best for:
UK SMEs wanting a recognised supplier;
companies combining broadband and telephone services;
firms preferring managed migration;
businesses requiring desk phones and conventional support routes;
organisations moving from existing BT services.
BT isn’t made for:
buyers wanting short, flexible contracts;
businesses that wish to avoid annual price rises;
companies seeking the lowest headline price;
organisations wanting a provider-neutral communications stack.
Our verdict
BT can provide reassurance for businesses that value an established supplier and a managed migration.
However, its longer contracts and scheduled annual increases mean buyers should compare the total contract value , rather than focusing on the first-year licence price.
Best-known UK telecoms provider
Best for flexible plans: Vonage Vonage offers a useful range of business communications plans with relatively clear UK pricing.
Published packages currently include (excluding VAT);
Express at £10 per user per month Core at £15 per user per month Max at £25 per user per month
Express provides unlimited inbound calls, a business landline number, desktop application and more than 30 calling features.
Core adds unlimited outbound calls, CRM integrations and Microsoft Teams compatibility.
Max adds a mobile-first option through VBC Mobile Connect eSIM, a business mobile number and additional messaging capabilities.
Vonage is best for:
small and medium-sized businesses;
companies wanting clear plan progression;
mobile and hybrid teams;
firms using CRM software;
businesses that may bring compatible handsets;
organisations wanting calling, messaging and video in one service.
Vonage is not great for:
companies requiring highly specialised UK reseller support;
businesses that need every premium feature on the entry plan;
organisations wanting a completely bespoke enterprise deployment.
Our verdict
Vonage strikes a useful balance between understandable pricing and broader unified-communications features.
Its Core package is likely to be the relevant comparison point for many growing SMEs because it includes unlimited outbound calls and integrations.
Best for flexible, scalable plans
Best VoIP provider for AI features: Dialpad Dialpad is built around an AI-enabled communications platform rather than treating artificial intelligence as a separate add-on and their services can combine:
telephone calls;
messaging;
video meetings;
call transcription;
summaries;
analytics;
coaching tools;
mobile and desktop access.
Dialpad currently states that its UK plans begin from £12 per user per month , with UK, US and Canadian calling included on applicable plans. Standard features include voicemail, call transfer, call waiting and video conferencing.
Dialpad is best for:
modern hybrid teams;
businesses wanting automatic transcription;
sales and support managers;
companies interested in conversation intelligence;
organisations wanting calling, messaging and meetings together.
Dialpad will not suit:
businesses that will not use its AI functionality;
traditional offices wanting a basic desk-phone replacement;
organisations preferring on-site support from a local telecoms reseller.
Our verdict
Dialpad offers a distinctive proposition for businesses that want useful AI features embedded into their daily calls and their value is strongest where teams will actively use transcription, summaries and analytics.
Best for AI-assisted business communications
Best for sales teams: Aircall
Aircall is designed particularly well for teams whose telephone calls sit at the centre of sales or customer service and their standard plans include:
softphones for desktop and mobile;
interactive voice response;
call recording;
click-to-dial;
integrations and API access;
included business numbers;
call analytics;
queue and routing tools.
Aircall is best for:
sales teams;
recruitment businesses;
customer-service departments;
support teams;
companies relying on CRM integration;
managers requiring call monitoring and analytics.
Aircall is not great for:
sole traders;
companies needing only one or two licences;
businesses seeking the cheapest general-purpose phone line;
organisations with little need for integrations or analytics.
Our verdict
Aircall is not simply a low-cost replacement for an office landline.
It is most valuable when calling activity needs to connect with a CRM, helpdesk or sales process. For those teams, its integrations and management tools can justify the higher cost.
Best VoIP provider for sales and customer-support teams
Best managed UK VoIP platform: Gamma Horizon Gamma Horizon is a widely supplied UK cloud phone system available through Gamma and its partner network and their platform can support:
hosted business telephony;
desktop and mobile applications;
call management;
reporting;
Microsoft Teams integration;
multiple locations;
contact-centre options;
compatible desk phones.
Gamma also offers several related communications services, including SIP trunking, Microsoft Teams Phone, Webex Calling, contact-centre products and its CircleLoop self-service system.
Gamma Horizon is best for:
SMEs wanting a managed installation;
companies buying through a trusted telecoms reseller;
businesses requiring connectivity and voice together;
multi-site UK firms;
organisations wanting access to several migration options.
Gamma Horizon is not good for:
buyers demanding transparent direct pricing;
businesses that want to purchase entirely online;
companies that have not checked the reputation of the reseller supplying the service.
Our verdict
Gamma Horizon is a strong underlying platform, but the commercial and support experience can depend on the partner selling and managing it.
Businesses should therefore compare both the platform and the reseller’s:
installation service;
support hours;
contract terms;
hardware;
response times;
price increases.
Best for a partner-managed UK deployment
Best for existing Zoom users: Zoom Phone Zoom Phone is a logical option for companies that already use Zoom Workplace for video meetings and collaboration and they support:
cloud calling;
mobile and desktop applications;
call recording;
voicemail;
central administration;
software integrations;
metered and unlimited calling options;
AI-supported summaries and call workflows on eligible plans.
Zoom Phone is best for:
companies already paying for Zoom;
hybrid and remote organisations;
firms wanting meetings and telephone calls in one environment;
international teams;
businesses comfortable with app-based calling.
Zoom Phone won’t suit:
traditional offices expecting a familiar UK telecoms-provider model;
buyers seeking highly visible UK-specific pricing;
businesses requiring a local managed installation.
Our verdict
Zoom Phone is most compelling as part of a broader Zoom communications setup.
A company already using Zoom extensively may be able to reduce the number of separate communications tools it operates.
Best for existing Zoom Workplace users
Best for Microsoft 365 businesses: Microsoft Teams Phone Microsoft Teams Phone adds cloud PBX and telephone controls to Microsoft Teams and businesses can connect Teams to external telephone networks using:
Microsoft Calling Plans;
Operator Connect;
Teams Phone Mobile;
Direct Routing.
Microsoft Teams Phone is best for:
organisations already using Microsoft 365;
companies where Teams is the main collaboration platform;
businesses with internal IT support;
organisations needing flexible carrier options;
larger companies consolidating calling and meetings.
Microsoft Teams Phone will not suit:
very small businesses needing rapid, simple setup;
firms without Microsoft 365;
businesses that lack internal expertise or a suitable Microsoft partner;
buyers comparing only the headline Teams Phone licence.
Our verdict
Teams Phone can be an excellent solution when it is implemented as part of a broader Microsoft strategy.
However, the complete cost can also include:
Microsoft 365 licensing;
Teams Phone licences;
calling plans or operator services;
implementation;
numbers;
certified hardware;
support;
contact-centre or recording software.
Best for Microsoft-centred organisations
Best VoIP provider by business type Best for sole traders
Recommended: bOnline or Vonage Express
A sole trader usually needs:
one professional business number;
inbound and outbound calls;
voicemail;
a mobile application;
business-hours routing;
number porting.
There is little benefit in paying for an enterprise communications platform unless advanced integrations or recording are genuinely required.
Best for small businesses
Recommended: bOnline, Vonage or BT
A business with two to ten users should prioritise:
understandable pricing;
UK call allowances;
easy administration;
mobile and desktop applications;
responsive support;
flexible growth.
bOnline is strongest on initial affordability, Vonage offers a clear upgrade path, and BT may appeal to companies wanting a recognised UK provider.
Best for growing SMEs
Recommended: RingCentral, 8×8 or Vonage
Growing businesses should assess whether the provider can support:
additional users;
more than one location;
CRM integrations;
department call queues;
reporting;
contact-centre services;
international expansion.
Changing platform again after two years can be disruptive, so scalability matters.
Best for remote and hybrid businesses
Recommended: RingCentral, Dialpad, Zoom Phone or Teams Phone
Remote teams normally need:
reliable mobile and desktop applications;
presence information;
easy call transfer;
messaging;
meetings;
central administration;
device flexibility.
Best for sales teams
Recommended: Aircall or Dialpad
Sales teams benefit from:
CRM integration;
click-to-call;
power dialling;
call recording;
coaching;
transcription;
call outcomes;
detailed analytics.
Best for customer service
Recommended: 8×8, RingCentral or Aircall
Customer-service teams should look beyond a standard hosted phone system and they usually need:
skills-based routing;
queue callbacks;
call monitoring;
supervisor controls;
dashboards;
quality management;
omnichannel support;
workforce management.
Best for multi-site companies
Recommended: 8×8, RingCentral or Gamma Horizon
Multi-site businesses require:
central management;
consistent numbering;
extension dialling;
site-based call routing;
resilience;
standardised equipment;
scalable licence administration.
Best for businesses already using Microsoft Teams
Recommended: Microsoft Teams Phone or Gamma Teams integration
Teams Phone can reduce application switching, but it needs to be implemented with the correct connectivity model.
Gamma and other UK communications partners can provide managed Teams calling for organisations that do not want to configure Direct Routing or Operator Connect internally.
How much do business VoIP providers cost? Most UK hosted VoIP systems cost approximately:
Service level Typical cost
Basic virtual phone line
Standard hosted VoIP
Advanced unified communications
Sales or support phone platform
Contact-centre software
£35-£100+ per agent/month
Additional costs may include:
handsets;
headsets;
installation;
number porting;
UK call bundles;
international calls;
recording storage;
CRM integration;
enhanced support;
annual price increases.
A five-user business may spend approximately £50 to £150 per month , while a 50-user organisation could spend £750 to £2,000+ per month , depending on features.
For a complete price breakdown, see our guide to VoIP Phone System Costs UK .
How we selected the best VoIP providers We considered the factors most likely to affect whether a business phone system offers suitable long-term value, and these include:
suitability for UK businesses;
pricing transparency;
available licence levels;
included calling;
mobile and desktop applications;
call-management features;
integrations;
analytics;
contact-centre options;
scalability;
UK support availability;
contract flexibility;
hardware options;
suitability for different company sizes.
There is no universal winner.
Our recommendations
What to look for in a VoIP provider Total monthly price
Ask for the full monthly cost, including:
every licence;
calls;
numbers;
add-ons;
hardware finance;
support;
recording;
integrations.
Contract length
Business VoIP contracts can run for:
one month;
12 months;
24 months;
36 months;
60 months.
Annual price rises
Ask whether prices rise:
every April;
by a fixed amount;
by inflation;
by inflation plus an additional percentage;
at the provider’s discretion.
Calculate the likely cost across the whole contract.
Call allowances
Confirm whether the package includes:
UK landlines;
UK mobiles;
international destinations;
diverted calls;
fair-use limits.
Support
Check:
support hours;
telephone availability;
response times;
service-level agreements;
emergency support;
whether support comes from the provider or reseller.
Reliability and resilience
Ask what happens when:
your broadband fails;
the office loses power;
the provider has an outage;
a handset fails;
employees cannot use the application.
Number porting
Confirm that the provider can retain your existing numbers before cancelling the old service.
Integrations
Common integrations can include:
Salesforce;
HubSpot;
Microsoft Teams;
Zoho;
Slack;
Zendesk;
Microsoft Dynamics;
Google Workspace.
Reporting and recording
Determine whether you need:
basic call logs;
missed-call reports;
queue analytics;
automatic recording;
long-term recording storage;
live dashboards;
AI summaries;
supervisor monitoring.
Hardware
Check whether phones are:
purchased;
rented;
financed;
included;
owned at the end of the contract;
locked to the supplier.
Questions to ask before choosing a VoIP provider Ask each provider:
What is the full monthly cost?
Which calls are included?
Are UK mobile calls included?
Is there a fair-use policy?
What does each licence include?
Can different employees use different licence levels?
Are mobile and desktop applications included?
How much do handsets cost?
Is equipment purchased, rented or financed?
Can we keep our existing numbers?
Are porting charges included?
What setup fees apply?
How long is the contract?
Will prices increase during the term?
Can we reduce licences if employees leave?
What support is included?
What happens during an internet outage?
Which CRM integrations are available?
How is call-recording data stored?
What does it cost to cancel?
Common VoIP provider mistakes Choosing solely on price
The cheapest advertised licence can become expensive when calls, hardware and support are added.
Buying the same plan for every employee
A receptionist, sales representative and occasional user will need different licence types.
Accepting a long contract without calculating increases
A five-year agreement with annual price rises can cost considerably more than its opening price suggests.
Cancelling the old service too soon
Do not cancel existing lines before number porting and testing are complete.
Ignoring broadband quality
VoIP depends on a reliable internet connection and poor connectivity can undermine an otherwise good phone platform.
Purchasing unnecessary handsets
Many employees can use a laptop or mobile application with a headset.
Paying for unused features
Advanced analytics, AI tools and CRM integrations only create value when employees use them consistently.
Is it worth switching VoIP providers? Switching can be worthwhile when:
your current contract is expensive;
support is poor;
employees cannot work remotely;
the system is difficult to administer;
you need better call reporting;
the existing platform lacks integrations;
you are approaching a contract renewal;
the business is moving from analogue services;
you need to combine several sites.
Before switching, check:
termination charges;
number portability;
handset compatibility;
recording exports;
broadband readiness;
call-flow requirements;
migration timing.
Frequently asked questions Who is the best business VoIP provider in the UK?
RingCentral is our leading overall option because it combines business calling, messaging, meetings, administration and integrations. However, bOnline may be more suitable for a small company seeking a low-cost service, while Aircall is better suited to sales teams.
What is the cheapest business VoIP provider?
bOnline currently advertises VoIP plans from £7 per user per month, excluding VAT. The cheapest complete provider will depend on included calls, contract length, handsets and additional features.
Which VoIP provider is best for small businesses?
bOnline, Vonage and BT are strong small-business options. bOnline is particularly competitive on published pricing, Vonage provides a clear range of plans, and BT may appeal to businesses wanting a familiar UK provider.
Which VoIP provider is best for sales teams?
Aircall and Dialpad are strong options for sales teams. Aircall focuses on integrations, analytics and sales workflows, while Dialpad offers embedded transcription and AI-supported call tools.
Which provider is best for Microsoft Teams?
Microsoft Teams Phone is the native option. Businesses can connect it using Microsoft Calling Plans, Operator Connect, Direct Routing or Teams Phone Mobile. Managed suppliers such as Gamma partners can also support Teams deployments.
Is BT Cloud Voice good?
BT Cloud Voice may suit businesses wanting an established UK supplier, multiple licence levels and a managed service. Buyers should examine its contract length and scheduled annual price increases before proceeding.
Is RingCentral suitable for small businesses?
Yes. RingCentral can support small businesses as well as larger organisations. It is most valuable when a company will use features such as messaging, meetings, integrations and advanced call management.
Is bOnline suitable for larger businesses?
bOnline primarily focuses on small businesses. A larger or more complex organisation may prefer RingCentral, 8×8, Gamma Horizon or another provider with broader enterprise and contact-centre options.
Do VoIP providers include handsets?
Some packages include or finance a handset, while others are app-only. Check whether the phone is owned, rented or financed and whether it remains usable after the contract ends.
Can I keep my business phone number?
Existing business numbers can usually be ported, but this should be confirmed before cancelling the current service.
Can I use VoIP without a desk phone?
Yes. Most providers offer desktop and mobile applications. A headset and computer may be sufficient for many employees.
Are VoIP calls unlimited?
Some plans include unlimited UK calls, subject to fair-use terms. Others provide a fixed allowance or charge calls separately.
How much does business VoIP cost?
Most UK business VoIP systems cost approximately £8 to £30 per user per month. Advanced sales, support and contact-centre platforms can cost more.
How long does switching VoIP provider take?
A straightforward system may be configured within days, but number porting, integrations and multi-site migrations can take several weeks.
What happens if the internet goes down?
Calls through the affected connection may stop working. A suitable system can redirect calls to mobiles, another site or a backup internet service.
Is business VoIP secure?
VoIP can be secure when it uses appropriate encryption, authentication, access controls, patching and fraud prevention. Businesses should also assess recording storage and data-protection arrangements.
Does every employee need a VoIP licence?
Usually, every person who needs an individual extension and application account will require a licence. Shared devices and light users may be handled differently depending on the provider.
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Hi, I’m Ally Cox , a senior copywriter and blogger at CompareYourBusinessCosts.co.uk, the UK’s trusted platform for comparing business services.over a decade of experience in the B2B sector, I specialise in simplifying complex topics like leased lines, VoIP, business energy, HR and payroll solutions, accounting software, and EPOS systems .HR, copywriting, and business operations- from clocking-in systems to card machines and office technology .informed, confident decisions when choosing products and services that improve efficiency and save money.
