Best VoIP Phone Systems for Small Businesses UK 2026

An Honest Guide, Not a Sales Pitch

This guide is written the way we would explain the options to another business owner across the table, not the way a reseller pitches a single product. If a platform is not right for you, we will say so. If the cheapest quote is likely to cost you more later, we will explain why. That is how we would want it explained to us.

With the PSTN switch off approaching, every business on traditional lines needs to move to VoIP. The good news is that VoIP gives a small business the same capabilities a large one has. The job is matching the right platform to how you actually work, then setting it up on a network that keeps calls clear and reliable.

What to Look for in a Small Business VoIP System

Not all VoIP systems are created equal. Here's what matters most for small businesses:

1. Clear, Fair Per-User Pricing

Look for transparent pricing with no hidden fees. Most hosted VoIP user licences sit between £12 and £20 per user per month and include inclusive UK landline and mobile calls. The full pricing guide below sets out what each part of a system typically costs. Be wary of headline prices that quietly exclude setup, porting, training or support.

2. Easy Setup and Management

You don't have an IT department. Your VoIP system should be simple to set up and manage through an intuitive web portal. Adding users, changing call routing, and updating voicemail greetings should take minutes, not hours.

3. Mobile App

This is non-negotiable in 2026. A business softphone app lets you make and receive calls on your business number from your mobile phone. No more giving out personal numbers or missing calls when you're away from the office.

4. Scalability

Your phone system should grow with you. Whether you're hiring your second employee or your twentieth, adding new users should be instant and straightforward.

5. Reliability and Support

When your phones go down, you lose money. Choose a provider with proven uptime (99.9%+) and responsive UK-based support. Ideally, you want someone local who understands Northern Ireland businesses.

Essential Features for Small Businesses

These are the features that make the biggest difference for small teams:

• Auto-attendant - greet callers professionally and route them to the right person without a receptionist
• Call forwarding - take calls on your mobile even when you're out of the office
• Voicemail-to-email - get voicemails delivered as audio files to your inbox
• Call recording - essential for training, compliance, and resolving disputes
• Hunt groups - ring multiple phones simultaneously so someone always answers
• On-hold music and messages - keep callers engaged and promote your services
• Microsoft Teams integration - if your team uses Teams, integrate your phone system directly

Hosted VoIP vs On-Premise: Which is Right for Small Businesses?

For the vast majority of small businesses, hosted VoIP is the clear winner. Here's why:

• No upfront capital expenditure - no expensive PBX hardware to buy
• No maintenance - your provider handles all updates and maintenance
• Built-in disaster recovery - the system runs in the cloud, not on your premises
• Automatic updates - always running the latest software with newest features
• Pay monthly - predictable costs that scale with your team

Hosted VoIP Pricing Guide

Business VoIP costs vary with the platform, features, compliance requirements and number of users, so we avoid pretending there is one fixed price. We also do not think you should have to hide behind "contact us" to get a rough idea. The figures below are realistic typical prices to help you budget. Every deployment is different, and we provide a tailored quotation after understanding how your business works, rather than recommending licences or hardware you do not need.

For a fuller breakdown of what drives the cost, see our guide on business phone system costs in 2026.

Platforms We Recommend, and When We Recommend Each

We are not tied to a single platform, and we do not think ranking them one to five helps you. What matters is where each one fits. Here is how we see the main options, based on the deployments we run.

Teleavox

Best suited for organisations looking for a feature-rich, enterprise hosted communications platform with minimal infrastructure to manage.

Strengths: fully hosted; UK, Ireland and EU hosting; GDPR compliant; ISO 27001 aligned hosting; PCI-compliant call recording options; advanced reporting; CRM integrations; contact centre capability; Microsoft Teams integration; mobile and desktop apps; strong resilience. Well suited to regulated industries.

Consideration: Teleavox is feature rich. Smaller businesses wanting only basic calling may not need every capability available.

Our view: Teleavox is generally our preferred fully hosted platform for organisations that want a powerful, long-term enterprise communications solution with strong compliance and reporting and minimal infrastructure to manage, backed by a trusted provider.

Yeastar

Best suited for businesses that want greater flexibility and control over how their phone system is configured, while still having the reassurance of expert support from Drakos Systems.

Strengths: can be deployed on-premises, in the cloud or in a hybrid configuration; supports multiple SIP providers for greater flexibility and resilience; highly configurable call routing and dial plans; strong support for analogue devices where required; excellent value for enterprise features; and it gives organisations more control over users, extensions and day-to-day administration if they choose.

Consideration: because Yeastar offers a much greater level of flexibility and customisation, it benefits from careful planning and implementation. As with any business phone system, the quality of the underlying network, firewall and configuration has a significant impact on reliability and call quality.

Our view: Yeastar is an excellent choice for businesses that want a flexible platform which can grow with them. It lets customers manage certain day-to-day tasks themselves, such as adding users or adjusting call routing, while still having the backing of Drakos Systems for technical support, maintenance and ongoing advice whenever it is needed.

Microsoft Teams Phone

Best suited for organisations already invested in Microsoft 365 that want communications integrated into their daily collaboration tools.

Strengths: native Teams integration, excellent for hybrid working, presence, meetings, internal collaboration and a familiar interface.

Consideration: Teams Phone is not automatically the cheapest solution once Microsoft licensing is considered, and some organisations still benefit from dedicated contact centre or reception functionality.

Our view: where Microsoft Teams is already central to the business, Teams Phone is a natural extension and reduces the need for multiple communications platforms.

Gamma

Best suited for businesses wanting a well-established UK hosted communications provider.

Strengths: reliable platform, strong UK presence, mature product and a wide reseller network.

Consideration: features and pricing vary considerably depending on the reseller.

Our view: Gamma remains a solid hosted VoIP platform, though we always compare it against the alternatives on your requirements rather than recommending it by default.

3CX

Best suited for businesses wanting a powerful PBX with extensive flexibility.

Strengths: excellent call routing, contact centre capability, on-premises or cloud, SIP provider freedom and strong integration options.

Consideration: 3CX provides significant flexibility but generally benefits from experienced administration and good network design.

Our view: 3CX remains an excellent PBX platform where a business needs advanced routing, integration or a bespoke deployment.

Real Deployment Examples

The clearest way to show how we work is to describe real projects. These are anonymised.

Manufacturing business

Challenge: the customer needed a modern communications platform across office staff and a busy factory floor. Several factory telephones operated in wet environments where reliability and emergency dialling were critical. The existing infrastructure had grown organically over many years and contained redundant cabling, undocumented extensions and ageing equipment.

What we delivered: a hosted VoIP platform; factory telephones protected within weather-resistant enclosures; verified emergency calling; desktop and mobile applications; business Wi-Fi improvements; intelligent call routing; cabling rationalisation; number migration; and user training.

Outcome: office staff now manage call routing themselves through an intuitive interface. Mobile and desktop apps let staff work from anywhere without losing functionality. Factory communications stay reliable in a challenging environment while ongoing maintenance is reduced.

Multi-site SME

Challenge: users worked across several locations and from home, and the existing phone system limited flexibility and required office-based working.

What we delivered: hosted cloud telephony; softphones; business mobile integration; auto attendants; hunt groups; call reporting; and desktop and mobile apps.

Outcome: users answer business calls from any location while presenting a consistent company number, and management gained improved reporting and simpler administration.

Business modernisation

Challenge: the business had inherited multiple telecom suppliers over several years. Some numbers had never been fully ported and remained dependent on forwarding services, and support responsibilities were unclear.

What we delivered: an infrastructure audit; number ownership verification; full number porting; removal of legacy forwarding; a firewall review; QoS implementation; documentation; and user training.

Outcome: reduced monthly costs, simplified support, improved resilience and clear ownership of all business numbers.

Basic VoIP Provider vs Managed VoIP Support

For businesses needing managed VoIP support (not just a provider), see our VoIP support Northern Ireland page.

The Three Most Common Mistakes We See

1. Number porting is not completed properly

One of the most common problems we find is a business believing its numbers have been ported when they are actually being permanently forwarded from the previous supplier. That creates unnecessary monthly forwarding costs, additional points of failure, administration complexity, delayed fault diagnosis and complications during any future migration. A correctly completed port transfers ownership of the number entirely, rather than relying on call forwarding.

2. Treating VoIP as just phones

VoIP is a network application, not simply a replacement telephone. We frequently find deployments where Quality of Service has never been configured, where voice traffic shares equal priority with backups and large file transfers, where SIP ALG has been left enabled on the firewall, where Wi-Fi coverage has not been assessed, where voice VLANs have not been used where appropriate, and where internet resilience has not been considered at all. The result is poor call quality, one-way audio, intermittent registration issues, dropped calls and faults that are hard to diagnose. A successful deployment starts with the network, not the handset.

3. Choosing the cheapest quote instead of the right solution

Many providers compete mainly on licence cost, and the hidden costs appear later. We regularly see systems supplied without proper user training, without documentation, without emergency dialling verified, without TLS and SRTP encryption, without firewall hardening, without resilience planning, without ongoing support and without room to scale. A phone system should support the business for many years, not simply offer the lowest monthly price.

When VoIP Is Not the Right Choice

Frequently Asked Questions