Best Office Phone Systems UK 2026 | Compare Business Phone Systems
Compare The Networks is an OFCOM regulated, independent comparison service helping UK businesses find the best telecoms deals since 2008. We compare office phone systems from leading UK providers so you can choose the right cloud or hosted system for your team without the sales pressure.
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About Office Phone Systems
An office phone system connects everyone in your business under a single set of numbers, features and call plans. In 2026 the vast majority of UK offices run on cloud-hosted VoIP rather than the old copper landline network, because it is cheaper to run, works across desk phones, laptops and mobiles, and scales up or down as your headcount changes.
We compare hosted phone systems from established UK providers side by side, looking at price per user, included minutes, contract length, call features and the quality of support. Whether you have three staff in one office or 300 across several sites, we match you to a system built around how your team actually works.
Types of Office Phone System
There are three broad options for a UK business today, and the right one depends on your size, budget and how much on-site kit you want to manage.
Cloud / hosted VoIP. Your phone system lives in the provider's data centre and calls travel over your internet connection. There is no PBX box on your wall. You get desk phones, softphone apps and advanced features such as auto-attendant, call recording and voicemail-to-email, all managed from a web portal. This is the best fit for most small and medium offices and is what we most often recommend.
On-premise PBX. A physical phone system installed and maintained at your office. It gives you full local control and can suit very large or highly regulated sites, but it carries upfront hardware costs, maintenance overheads and limited remote working. Most SMEs no longer choose this route.
Traditional landline (PSTN / ISDN). The legacy analogue and ISDN network. Openreach is switching this off across the UK, with the national stop-sell already in place and full withdrawal scheduled for 2027. Any office still on a traditional landline will need to migrate to a digital or VoIP system before the switch-off, so it makes sense to plan the move now rather than under pressure later.
How It Works
- Tell us about your office (number of users, whether you want desk phones or apps, and the features you need)
- We compare hosted phone systems from leading UK providers on price, features and support
- You choose the best fit with no obligation, and we handle setup and number porting for you
The entire process takes under 60 seconds to start and is completely free. We are OFCOM regulated and have been helping UK businesses since 2008.
Why Compare?
Many businesses stay on an ageing or overpriced phone system simply because switching feels like hassle. In reality a modern hosted system is usually cheaper per user, adds features your old setup never had, and can be live within days. Comparing providers side by side shows you exactly where you are overpaying and what better value looks like.
| What We Check | Why It Matters |
|---|---|
| Price per user | The headline figure that drives your monthly bill as you grow |
| Included minutes & call rates | UK landline, mobile and international costs vary widely between providers |
| Contract length & terms | Length, price rises and exit fees all affect the true cost |
| Call features | Auto-attendant, call recording, IVR and analytics are not always included |
| Remote & mobile working | Softphone and mobile apps keep staff reachable anywhere |
| Support & account management | UK-based help and a named contact matter when a line goes down |
Frequently Asked Questions
What is a hosted or cloud phone system?
A hosted or cloud phone system is an office phone service that runs from your provider's data centre rather than from hardware installed at your premises. Calls travel over your internet connection using VoIP technology. You get desk phones and app-based softphones, plus features such as auto-attendant, call recording and voicemail-to-email, all managed through a web portal. There is no PBX box to buy or maintain, which is why most UK offices now choose this approach.
How much does an office phone system cost per user in the UK?
Hosted phone systems in the UK typically cost between 8 and 20 pounds per user per month, depending on the provider, the call plan and the features you include. Cloud systems remove the large upfront hardware bill of a traditional PBX, so most businesses pay a predictable monthly fee per seat. Get a free, tailored quote and we will show you the best price for your exact number of users.
What is the best office phone system for a small office?
For most small offices, a cloud-hosted VoIP system is the best choice. It scales easily as you add staff, needs no on-site hardware, and includes business features such as call routing, an auto-attendant and mobile apps that would once have needed expensive equipment. The right provider depends on your budget, how many users you have and whether you want physical desk phones, softphone apps or both, which is exactly what our free comparison sorts out.
Does a cloud phone system work with my existing handsets?
In many cases yes. Modern IP desk phones work directly with hosted systems, and some analogue phones can be connected using an adapter. If you already have compatible VoIP handsets, a new provider can often reuse them, and where they cannot, most providers supply pre-configured phones as part of the package. Tell us what hardware you have and we will factor it into your comparison.
How does the PSTN switch-off affect my office phone system?
The traditional analogue landline and ISDN network is being withdrawn by Openreach, with a national stop-sell already in force and full switch-off scheduled for 2027. Any office still using a traditional landline system will need to move to a digital or VoIP-based phone system before then. Switching to a hosted phone system now avoids a last-minute rush and gives you modern features straight away.
Can I keep my existing phone number when I switch?
Yes. You can port your existing business numbers, including your main office line, to a new hosted phone system. The provider manages the transfer so your numbers continue working, and porting is usually completed with little or no disruption to incoming calls. Keeping your established number means customers and suppliers notice no change.
Related Pages
- Business VoIP Phone Systems
- Business VoIP Providers
- Business IT & VoIP Bundle
- VoIP vs Virtual Landline
- Virtual Landline UK
- Business Telecoms Providers
- Get a Free Quote
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