PSTN Switch-Off 2027 — Are you ready?

Compare VoIP Providers in the UK (2026)

A structured way to choose the right business phone solution

Start with a quick shortlist, then validate your options through reviews and side-by-side comparisons. Built to help UK businesses weigh pricing, call handling, support, security, and migration readiness with more confidence.

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Connectivity & Telecoms

Transparent scoring

Clear criteria, visible disclosures, and a more consistent way to evaluate providers.

Why businesses use CompareVoIPService

Built to help UK businesses move from early research to a confident phone system decision without the usual confusion.

  • Independent criteria and practical evaluation
  • Shortlist, review, and comparison paths kept separate
  • PSTN readiness kept visible from the start
📊 How we rank providers 🔒Affiliate disclosure
Interactive VoIP recommendation tool for UK businesses, providing tailored provider shortlists based on headcount, budget, and PSTN readiness.

✨ Get a recommendation

Interactive tool to estimate business VoIP savings for UK companies, comparing current PSTN costs against modern cloud telephony prices.

💰 Estimate savings

Lead analyst evaluating the best UK business VoIP providers for 2026, based on a 42-point evaluation framework including pricing, security, and PSTN readiness.

📋 See best providers

Lead analyst at CompareVoIPService conducting a manual 42-point audit of UK business phone systems, ensuring unbiased provider rankings.

🏆 VoIP provider reviews

Conceptual image representing the unlocking of legacy telecom contracts and transitioning to modern UK VoIP business phone systems.

⚖️ VoIP provider comparisons

Strategic planning graphic for the UK PSTN switch-off in 2027, featuring readiness routing and business continuity safeguards for VoIP migration.

⏰ PSTN switch-off guidance

Trusted UK VoIP Providers We Compare

  • Wildix UK logo for browser-based VoIP, WebRTC solutions, and secure business phone reviews.
  • Vodafone Business logo for UK cloud phone systems and converged mobile VoIP reviews.
  • Virgin Media Business logo for UK business VoIP, gigabit broadband, and cloud voice reviews.
  • Three Business logo for 5G-ready VoIP and mobile business communication reviews.
  • TalkTalk Business logo for UK business VoIP, SIP trunking, and broadband comparison.
  • RingCentral logo for UK business phone system reviews and AI VoIP features.
  • O2 Business logo for VoIP and cloud phone system comparison UK.
  • Horizon cloud phone system logo by Gamma for UK business VoIP reviews.
  • Gamma Business Communications logo for Horizon VoIP and SIP trunking reviews UK.
  • EE Business logo for mobile-first VoIP and cloud phone system comparisons UK.
  • BT Business logo for Cloud Voice and UK PSTN switch-off migration comparison.
  • 8x8 logo for UK business VoIP reviews and international calling comparisons.
  • 3CX logo for UK business VoIP phone system comparison and reviews.

Choose the route that matches where you are in the decision process

Some visitors want a fast shortlist. Others want to estimate costs, compare providers, or plan for PSTN changes. Start with the route that fits your stage.

A 4-step interactive VoIP recommendation quiz for UK businesses covering business size, call handling needs, software integrations, and budget priority.

Get a recommendation

Answer a few practical questions and get a shortlist based on business fit, not just brand familiarity.

VoIP recommendation quiz
Interactive VoIP savings calculator for UK businesses to estimate total contract value based on monthly cost per user, total users, and contract length.

Estimate savings

Estimate likely cost changes and see where VoIP may improve value over time.

VoIP savings calculator
Start here

Validate your shortlist

Start with a shortlist, then use reviews and comparisons to narrow the final choice with more confidence.

📋 Best VoIP providers in the UK 🏆 VoIP provider reviews ⚖️ VoIP provider comparisons

What we compare

The right provider is the one that fits your workflows, admin needs, and commercial reality — not just the headline monthly price.

Comparison of UK VoIP pricing models showing simple per-user costs versus complex add-ons, usage charges, and minimum contract terms.

Pricing signals

We look beyond entry pricing to consider add-ons, usage patterns, setup costs, and minimum terms.

Best VoIP providers in the UK
A technical overview of VoIP call handling features including IVR, call queues, intelligent routing rules, and missed-call protection for UK business phone systems.

Call handling and routing

From IVR and queues to routing rules and missed-call protection, we focus on how the system works in practice.

VoIP provider reviews
Comprehensive overview of business VoIP security features including administrative controls, user roles, real-time reporting, and overall security posture for UK provider comparisons.

Governance and security

We also look at admin controls, reporting, permissions, and the broader operational confidence a provider gives your team.

VoIP provider comparisons

Planning for the UK PSTN switch-off

PSTN-readiness is about business continuity as much as technology. Use the hub to understand what changes, what to review early, and how to reduce cutover risk.

⏰ PSTN switch-off guidance ⏰ PSTN switch-off timeline ⏰ PSTN migration guide
Strategic planning graphic for the UK PSTN switch-off in 2027, featuring readiness routing and business continuity safeguards for VoIP migration.
Detailed timeline and guidance for the UK PSTN to VoIP migration, highlighting routing for business continuity and risk mitigation.

Popular comparisons

These pages are built for final decision-stage research. They do not rank providers. They focus on the trade-offs between shortlisted options.

Technical comparison of RingCentral vs 8x8 for UK business, evaluating admin experience, support expectations, and international calling cost signals.

RingCentral vs 8×8

Compare the two across call handling depth, business fit, admin experience, and overall flexibility.

Open comparison
Head-to-head comparison between RingCentral and Vonage for UK business phone systems, focusing on CRM integrations and contract flexibility.

RingCentral vs Vonage

See how the two platforms differ on integrations, calling workflows, and commercial considerations.

Open comparison
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Explore more matchups

Browse the comparison hub to find the right head-to-head page for the providers already on your shortlist.

⚖️ VoIP provider comparisons

Provider reviews

Once you have a shortlist, provider reviews help you go deeper into fit, strengths, and trade-offs before you make the final choice.

A detailed comparison interface showing a VoIP provider's pros and cons, Trustpilot ratings, and UK support availability to help businesses find the right fit.

VoIP provider reviews

Read focused provider reviews that explore fit, strengths, and limitations without mixing in ranking logic.

VoIP provider reviews
A ranked shortlist of the best VoIP providers in the UK for 2026, featuring star ratings and reviews for RingCentral, bOnline, and 8x8 to help businesses validate their choice.

Shortlist first

Use the best provider pages to narrow the field, then move into reviews once you have two or three serious options.

Best VoIP providers in the UK
A head-to-head validation tool comparing UK VoIP providers RingCentral, 8x8, and Gamma on flexible routing, CRM integration, uptime targets, and UK-based support.

Validate decisions

When two providers still look close, use comparisons to check the final trade-offs side by side.

VoIP provider comparisons

Learn the basics fast

These guides help early-stage buyers understand the essentials without duplicating the role of rankings, reviews, or comparisons.

Educational infographic explaining Voice over Internet Protocol (VoIP), comparing traditional phone lines to internet-based calling, and outlining the 3-step technical process of voice-to-data conversion.

What is VoIP?

A quick guide to what VoIP is, how it works, and why businesses are moving away from older phone systems.

What is VoIP?
A side-by-side comparison between VoIP and traditional landlines for businesses, highlighting internet-based calling, remote team flexibility, and scalability versus physical line limitations.

VoIP vs landline

A practical comparison covering flexibility, features, maintenance, and what changes when moving to modern business telephony.

VoIP vs landline
Next step

Turn learning into action

Once you understand the basics, use the quiz or calculator to move from general research to a clearer shortlist and cost picture.

✨ VoIP recommendation quiz 🔢 VoIP savings calculator
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Transparent scoring

Clear criteria and consistent evaluation across page types.

2
Intent-safe routing

Ranking, reviews, comparisons, guides, tools and PSTN content stay separated by job.

3
Disclosures built in

Methodology and disclosure pages are always visible and linked.

Next step

Get the right provider shortlist with less guesswork

Start with a few practical questions, build a stronger shortlist, and then validate your options through reviews and comparisons.

✨ VoIP recommendation quiz 🏆 Best VoIP providers in the UK

FAQs

After January 31, 2027, traditional analogue (PSTN) and ISDN lines will cease to function across the UK. If your business hasn’t migrated to a VoIP or digital system, your desk phones, fax machines, and even some alarm systems will stop working. We recommend transitioning by mid-2026 to avoid the “last-minute rush” and potential hardware shortages.

No. While the original deadline was December 2025, BT Openreach extended the final PSTN switch-off to January 2027 to allow more time for vulnerable customers and complex business setups to migrate. However, “Stop Sell” orders are already in effect across most of the UK, meaning you can no longer buy new analogue lines.

The “best” provider depends on your specific needs: 8×8 is often cited for international calling, RingCentral for advanced AI-driven analytics, and Vonage for its flexible API integrations. For UK micro-businesses, Lily Comms and bOnline remain top-rated for affordability and local support.

In 2026, UK business VoIP prices typically range from £10 to £35 per user, per month. Entry-level tiers usually include a local number and mobile app, while premium tiers offer CRM integration (Salesforce/HubSpot) and AI meeting transcripts.

Yes. Through a process called number porting, you can move your existing UK landline number to any VoIP provider. You should initiate the porting request before canceling your old contract to prevent losing the number. Most ports take 7 to 14 working days to complete.

While most modern fibre routers work, a VoIP-optimized router with Quality of Service (QoS) settings is recommended. QoS prioritizes voice traffic over standard data (like large downloads), ensuring high-definition call quality even during peak internet usage.