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Cutting business overheads without cutting quality
Where UK SMEs typically overpay on telecoms, software and office contracts.
Read guideCompare voip phone systems
Compare cloud VoIP phone systems for UK businesses, with call routing, mobile apps and no traditional phone line needed.
Compare VoIP phone systems quotes TrustpilotTrustScore 4.7 | reviews
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How VoIP phone systems works
VoIP replaces traditional phone lines with calls carried over your internet connection, billed per user rather than per line.
With BT's PSTN switch-off completing across the UK, most businesses are moving to cloud-hosted VoIP by default.
Modern systems bundle call recording, IVR menus, softphone apps and analytics that would have cost thousands on legacy hardware.
What affects the cost of VoIP phone systems
- Number of users or extensions
- Feature tier (call recording, IVR, analytics)
- Handsets purchased or rented
- Call bundles and international destinations
- Contract length and onboarding support
Why compare VoIP phone systems with us
Work from anywhere
Desk phone, laptop and mobile all ring on the same number.
Keep your numbers
Existing geographic numbers port across to VoIP.
Built-in call handling
IVR menus, hunt groups and out-of-hours routing as standard.
Predictable per-user pricing
Add or remove seats as headcount changes.
Typical VoIP pricing per user
Indicative monthly costs excluding VAT and handsets.
| Tier | Key features | Per user per month |
|---|---|---|
| Entry | Calls, voicemail, mobile app | £8 - £12 |
| Standard | Call recording, IVR, integrations | £12 - £20 |
| Advanced | Analytics, CRM integration, queueing | £20 - £32 |
| Contact centre | Full agent and supervisor tooling | £35 - £60 |
Hardware options
You can buy handsets outright, rent them, or use software only.
| Option | Upfront cost | Notes |
|---|---|---|
| Softphone only | £0 | Laptop and mobile apps, no desk phone |
| Rented handsets | £0 | £3 - £8 per phone per month |
| Purchased handsets | £60 - £220 each | Cheaper over a 3-year horizon |
Expert advice
Our team reviews UK business suppliers, contract terms and pricing models throughout the year.
“VoIP is only as good as the connection underneath it. Sort the broadband and failover first, then choose the phone system.”
VoIP phone systems: pros and cons
Pros
- Significantly cheaper than legacy ISDN phone systems
- Scales up or down by the seat
- Full feature set included at modest tiers
- Future-proof ahead of the UK PSTN switch-off
Cons
- Call quality depends entirely on your internet connection
- Needs a power and broadband backup plan for outages
- Emergency call location must be kept up to date
How to choose VoIP phone systems
The cheapest headline price rarely wins. Check these points before you sign.
- 1
Check your broadband headroom
Each concurrent call needs about 100kbps up and down — a poor upload ruins VoIP.
- 2
Ask about number porting
Confirm your existing numbers can move, and how long it takes.
- 3
Look at integrations
CRM and helpdesk integration is where VoIP saves real time.
- 4
Plan for outages
4G failover on your router keeps phones alive if broadband drops.
Compare VoIP phone systems
See what's available for your business today. It takes just minutes.
How to compare VoIP phone systems
It takes a few minutes and there is no obligation to switch.
1. Tell us about your business
Team size, sites and roughly what you spend today.
2. See matched suppliers
We shortlist UK providers who serve businesses like yours.
3. Compare the full package
Contract length, support levels and set-up costs, not just monthly price.
4. Switch when you're ready
Your chosen supplier handles onboarding and any migration.
Things to watch out for
Very cheap per-user tiers often exclude call recording, which many regulated sectors need.
Some providers charge separately for the mobile app or for each additional device.
Porting numbers from certain legacy providers can take several weeks.
Our VoIP phone systems service
We compare VoIP phone systems from established UK suppliers so you can see pricing, contract terms and support side by side.
Comparing is free, and we will tell you plainly if your current deal already looks competitive.
Getting started
1
Gather your current bills
Your latest invoice shows spend, contract end date and notice period.
2
Map what you actually need
List must-haves versus nice-to-haves so you don't overbuy.
3
Check your exit terms
Most UK business contracts need 30 to 90 days' notice before renewal.
Why choose Grow Your Business?
Wide choice of providers
We compare a broad range of UK providers so you can find the option that actually fits how your business operates.
Exclusive offers
We work hard to bring you exclusive deals, switching incentives and cashback where they're available.
Simple and fast
It takes just a few minutes to compare with us — and the deal you find could be well below what you pay today.
Types of VoIP phone systems
The right option depends on your size, budget and how fast you're growing.
Hosted VoIP
Fully cloud-based, no on-site hardware beyond handsets.
SIP trunking
Keeps your existing on-premise PBX but carries calls over IP.
Unified communications
VoIP combined with video meetings, chat and presence.
Contact centre VoIP
Queueing, wallboards and agent analytics for sales or support teams.
Providers we compare
Logos are shown for identification. We are not affiliated with every supplier listed and do not compare the whole market.
RingCentral
8x8
Gamma
BT Business
Vonage
DialpadComparing with us is a no-brainer
“Our team went fully remote and clients never noticed — same numbers, same call flow.”
Priya, recruitment agency, Leeds
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Read guideVoIP phone systems FAQs
Will VoIP work with my broadband?
Most business connections handle it easily. Each concurrent call uses roughly 100kbps in each direction.
Can I keep my existing phone numbers?
Yes, geographic numbers can be ported to a VoIP provider, typically within two to four weeks.
What happens if the internet goes down?
Calls can be diverted automatically to mobiles, and 4G failover routers keep the system running.
Do I need special handsets?
No. You can use softphone apps on laptops and mobiles, or add IP desk phones if your team prefers them.
Written by the Grow Your Business editorial team · Updated 26 July 2026