Hosted VoIP Solutions UK 2026: Enterprise & SME Options Compared

Hosted VoIP has become the default phone system for UK businesses. With the PSTN switch-off scheduled for January 2027, every business still using traditional phone lines must migrate to a voice-over-IP solution — and hosted VoIP is the simplest, most cost-effective path for the vast majority of SMEs and enterprises alike.

This independent 2026 guide compares the leading hosted VoIP providers in the UK, examines features, pricing, call quality, and migration support, and helps you choose the right platform for your business. All prices quoted are ex-VAT.

Hosted VoIP Provider Comparison 2026

The table below compares eight of the most widely used hosted VoIP platforms in the UK. Prices shown are per-user monthly costs on annual billing for the entry-level business tier.

How many handsets does your team need?

Get a free no-obligation quote in 60 seconds

1-2

3-9

10-49

50+

No obligationTakes 60 seconds5,000+ businesses

When does your current contract expire?

Out of contract

< 3 months

3 months+

Not sure

← Back

Tell us about your business

Business name *

Postcode *

Continue →← Back

Your details

First name *

Last name *

Business email *

Contact number *

Get My Free Quote →← Back

We'll never share your details. Unsubscribe anytime.

Thank you!

One of our mobile experts will be in touch shortly with your tailored quote.

TRUSTED BY

Price is important, but it should not be the only factor. The cheapest platform is useless if it lacks the features your business needs or if call quality is inconsistent.

Feature Comparison: What Matters Most

Hosted VoIP platforms vary significantly in their feature sets. Here are the capabilities that matter most to UK businesses, and how the leading providers compare.

Call Management

Every hosted VoIP platform includes basic call management — call transfer, hold, and voicemail. Where platforms diverge is in advanced features like call queues, ring groups, and interactive voice response (IVR) menus. For businesses that receive a high volume of inbound calls, these features are essential for routing callers to the right department efficiently.

• Auto-attendant / IVR: An automated greeting that directs callers via menu options (“Press 1 for sales, 2 for support”). Available on all platforms listed above, but the number of menu levels and customisation options vary
• Call queuing: Places callers in a queue when all agents are busy, with hold music and position announcements. Essential for customer service teams
• Ring groups / hunt groups: Distributes incoming calls across a team using strategies like ring-all, sequential, or round-robin
• Call recording: Records calls for training, compliance, or dispute resolution. Some platforms include this free; others charge extra

Unified Communications (UCaaS)

UCaaS integrates voice, video, messaging, and collaboration tools into a single platform. Rather than using separate tools for calling, video meetings, and team chat, everything lives in one application. RingCentral, 8×8, and Vonage are the strongest UCaaS platforms, with fully integrated video conferencing, team messaging, file sharing, and task management alongside voice calling.

CRM Integration

For sales and customer service teams, CRM integration is transformative. When a customer calls, their record automatically appears on screen. Calls are logged against the contact record, and click-to-dial eliminates manual number entry. The depth of integration varies significantly between platforms — some offer a basic screen pop, while others provide full bi-directional sync with call recordings, notes, and outcomes written back to the CRM.

Mobile App

Every provider now offers a mobile app that lets you make and receive calls on your business number from your smartphone. The quality of these apps varies considerably. The best (RingCentral, 8×8, Vonage) offer a near-identical experience to the desktop client. Others provide basic calling but lack features like call transfer, presence status, and voicemail management.

Migration: Moving from Your Current Phone System

Migrating to hosted VoIP involves several steps, and the complexity depends on your current setup. Here is a typical migration timeline for a UK business.

Step 1: Audit Your Current System (Week 1)

Document your existing phone numbers, extensions, call flows, and any integrations. Identify how many concurrent calls your business handles at peak times. Check your broadband speed and reliability — VoIP requires consistent bandwidth and low latency.

Step 2: Choose Your Provider and Configure (Weeks 2–3)

Select your provider, finalise the feature set, and configure the system. This includes setting up user accounts, building IVR menus, configuring ring groups, and setting up CRM integrations. Most providers offer a web-based admin portal where you can do this yourself or have their team configure it for you.

Step 3: Port Your Numbers (Weeks 3–5)

Number porting for geographic (landline) numbers typically takes 1–2 weeks in the UK. During this period, calls to your existing numbers will automatically redirect to your new VoIP platform. Mobile number porting is faster — usually 1–3 days.

Step 4: Deploy Hardware and Train Users (Week 4–5)

If you are using desk phones, these need to be deployed and provisioned. If your team will use softphones on their computers and mobiles, the relevant applications need to be installed. Training is essential — even a simple system change causes disruption if users are not prepared.

Step 5: Go Live and Decommission Old System (Week 5–6)

Once all numbers have ported and users are comfortable, your old phone system can be decommissioned. Keep the old system available for a few days as a safety net in case any numbers or configurations were missed.

Hosted VoIP vs On-Premise PBX

Some businesses still consider on-premise PBX systems as an alternative to hosted VoIP. Here is how they compare.

For the vast majority of UK businesses in 2026, hosted VoIP is the better choice. On-premise PBX only makes sense for very large enterprises with specific compliance requirements or organisations with unreliable broadband that cannot yet support cloud voice.

Choosing the Right Plan Tier

Most hosted VoIP providers offer two to four plan tiers, and the feature differences between tiers can be significant. Understanding what each tier includes helps you avoid both overpaying for features you do not need and underpaying for a system that lacks essential functionality.

Entry-Level Plans (£6–£10/user/mo)

Entry-level plans typically include basic call management (transfer, hold, voicemail), a mobile app for remote working, auto-attendant with a single menu level, and basic call reporting. These plans are well-suited to small businesses with straightforward call handling needs — a few extensions, no complex routing, and limited need for analytics or CRM integration. For many SMEs, an entry-level plan from a strong provider delivers more functionality than they had with their previous PBX system.

Mid-Tier Plans (£10–£15/user/mo)

Mid-tier plans add features like call recording, advanced hunt groups and ring strategies, multi-level auto-attendant with time-based routing, detailed call analytics and wallboards, and CRM integration with popular platforms. This is the sweet spot for most growing businesses. The addition of call recording alone justifies the step up for any business in a regulated industry or one that wants to use calls for training and quality assurance.

Premium Plans (£15–£25/user/mo)

Premium plans include everything in the mid-tier plus advanced analytics and AI-powered insights, workforce management tools, omnichannel capabilities (voice, email, chat, social media), advanced integrations with bespoke APIs, and dedicated account management with priority support. Premium plans are typically needed only by larger businesses with contact centre requirements, complex multi-site deployments, or regulatory needs that demand comprehensive call handling and reporting capabilities.

Our Recommendation

Start with the plan that matches your current needs — do not pay for features you will not use in the next 12 months. A good provider makes it easy to upgrade your plan as your needs grow, so there is no need to over-provision from day one. Connection Technologies’ Hypercloud VoIP starts at £6/user/month and includes features that many providers reserve for their mid-tier plans, including call recording, multi-level auto-attendant, and CRM integration.

Call Quality: What Affects It and How to Ensure It

Call quality is the single most important factor in a VoIP deployment. Poor call quality — jitter, latency, dropped calls — will undermine user adoption and damage your professional image. Here is what affects it and how to ensure consistently high quality.

• Bandwidth: Each concurrent VoIP call requires approximately 100 Kbps of bandwidth. Ensure your broadband connection has sufficient headroom for peak call volumes plus all other internet usage
• Quality of Service (QoS): QoS settings on your router prioritise voice traffic over other data. This is critical on shared connections where large file downloads could otherwise cause call quality issues
• Jitter and latency: Jitter (variation in packet arrival time) and latency (delay) must be below 30ms and 150ms respectively for acceptable call quality. Your broadband connection must deliver consistent performance, not just high peak speeds
• Network hardware: Consumer-grade routers are a common cause of VoIP quality issues. A business-grade router with built-in QoS and a managed network switch make a significant difference
• Provider infrastructure: The provider’s own network quality matters. Look for providers with multiple UK data centres, redundant connectivity, and published uptime SLAs of 99.99% or better

Frequently Asked Questions

What happens if my internet goes down?

Most hosted VoIP platforms include automatic failover. If your broadband drops, calls can be redirected to mobile phones, an alternative site, or a voicemail system. The failover is typically configurable and activates within seconds. This is actually an advantage over traditional phone lines, which had no failover capability at all.

Can I keep my existing phone numbers?

Yes. All UK geographic (landline) numbers and mobile numbers can be ported to any hosted VoIP provider. The process takes 1–2 weeks for geographic numbers and is managed entirely by your new provider.

Do I need new desk phones?

If you have existing SIP-compatible IP phones, you can usually reuse them. If you have analogue phones, you will need to replace them with IP phones or use analogue telephone adapters (ATAs). Many businesses are moving away from desk phones entirely, using softphone applications on computers and mobiles instead.

Is VoIP reliable enough for business use?

Yes. Leading hosted VoIP providers deliver 99.99% uptime or better, which translates to less than 53 minutes of downtime per year. With proper broadband and network configuration, call quality matches or exceeds traditional phone lines.

How much does it really cost for 20 users?

Realistic monthly costs for a 20-user hosted VoIP deployment range from £120/mo (CT Hypercloud at £6/user) to £280/mo (BT Cloud Voice at £14/user). Add £30–£100/mo for any additional call bundles, and factor in a one-off cost of £50–£150 per desk phone if you need new hardware.

What SLA should I expect?

Look for a provider who guarantees 99.99% platform uptime with financial credits if they miss the target. Response time SLAs should specify a maximum time to acknowledge and a maximum time to resolve, with priority levels for different severity issues.

Number Porting Considerations

Number porting is one of the most important steps in any VoIP migration, and it is often the one that causes the most anxiety. The good news is that number porting is a well-established, regulated process in the UK, and any reputable provider will handle it seamlessly.

Geographic numbers (starting with 01 or 02) are ported via the CUPID (Carrier and User Portability Industry Database) system and typically take 7–10 working days. Non-geographic numbers (03, 08, 09) follow a similar process. Mobile numbers use the PAC (Porting Authorisation Code) system and port within 1–3 working days. During the porting window, calls to your existing numbers are automatically forwarded to your new VoIP platform — there is no gap in service.

The most common issue with number porting is incorrect information on the porting request. Ensure you provide the exact account holder name, address, and account number as they appear on your current provider’s records. Any discrepancy can delay the port by several days while verification takes place.

The Bottom Line

Hosted VoIP is the clear choice for UK businesses in 2026. The PSTN switch-off makes migration inevitable, and the benefits — lower costs, greater flexibility, better features, and built-in disaster recovery — make it desirable regardless.

The key is choosing the right provider. Price matters, but so do call quality, feature depth, integration capabilities, and the quality of support. For most UK SMEs, an independent provider like Connection Technologies offers the best combination of all these factors — enterprise-grade features at a fraction of the cost of the big-name platforms, with the personal service that only an independent provider can deliver.