Gamma VoIP: The Ultimate Guide Quick answer
Gamma VoIP is a UK business phone system best known for Gamma Horizon, its hosted cloud phone platform used by SMEs, growing businesses and multi-site organisations.
It is a strong option if you want a reliable UK-hosted VoIP system, predictable per-user pricing, desk phone and softphone support, number porting, call management features and reseller-led setup.
Gamma is especially worth comparing if your business is moving away from landlines, replacing an older PBX, adding remote workers, or preparing for the UK PSTN switch-off.
However, Gamma is not always the cheapest VoIP option, and final pricing can vary depending on the reseller, package, call bundles, handsets, setup fees and contract length.
Gamma VoIP pricing typically starts from around £9-£12 per user per month, but most businesses should compare at least 2-3 quotes before choosing Gamma Horizon or an alternative provider.
Compare Gamma VoIP quotes now and see whether your business could save up to 40%.
Contents
Benefits of Gamma Business VoIP
Downsides of Gamma Business VoIP
Gamma VoIP pricing
Who Gamma is best for
What Does Gamma Offer?
What Other People Think of Gamma Business VoIP
What Do Staff Think of Gamma Business VoIP?
Our Verdict on Gamma Business VoIP
How do we work?
Transparent, impartial, and data‑driven reviews made by a team of expert humans, never AI generated – here’s exactly how Compare Your Business Costs helps you find the best deals from trusted UK providers: click here
Authored by: Ally Cox (Business Technology & B2B Services Specialist 10+ Years’ Experience)
Reviewed by: James Ward (Telecoms Specialist, 12+ Years Experience)
Last Updated: July 2026
Key takeaways 2026
Best known for the Horizon hosted phone system, used by thousands of UK businesses
Typical pricing starts around £9–£12 per user per month, depending on package and call bundles
Strong UK network reliability and long-standing telecoms pedigree
Scales well for growing and multi-site organisations
Less flexible than self-hosted or highly customised PBX platforms
Category Gamma VoIP review
Best for
SMEs, growing businesses and multi-site organisations
Main product
Gamma Horizon hosted phone system
Typical pricing
From around £9-£12+ per user/month
Pricing type
Usually quote-based through partners or resellers
Main strengths
UK network, reliability, simple management and scalability
Main downsides
Less customisable than self-hosted PBX systems
Best alternatives
RingCentral, 8×8, bOnline, BT Cloud Voice, Vodafone, 3CX, Teams Phone
Best for small businesses?
Yes, especially SMEs wanting reliable hosted VoIP
Best for large businesses?
Yes, depending on reseller support and required features
Verdict
Strong UK-hosted VoIP option, but compare reseller pricing carefully
Should you choose Gamma VoIP? Gamma is a good VoIP option for many UK businesses, but it is not the right fit for every company.
Use this quick guide before requesting a quote.
Is Gamma worth comparing? Why
Reliable hosted VoIP
Yes
Gamma Horizon is a well-established hosted phone system
UK telecoms infrastructure
Yes
Gamma is a major UK telecoms provider
Desk phones and softphones
Yes
Horizon supports traditional office and app-based calling
Multi-site phone management
Yes
Useful for businesses with more than one location
Remote and hybrid working
Yes
Softphone and mobile app support can help flexible teams
Lowest possible VoIP price
Compare alternatives
bOnline, 3CX or app-first providers may be cheaper
Fully self-hosted PBX control
Probably not
3CX or another PBX platform may suit better
Microsoft Teams-first calling
Maybe
Compare Gamma Teams integration with Microsoft Teams Phone
Call centre tools
Maybe
Compare Gamma against RingCentral, 8×8, Aircall and Dialpad
Instant DIY signup
Probably not
Gamma is usually quote-led through partners and resellers
Bottom line: Gamma is best for businesses that want a proven hosted VoIP system with UK telecoms support, but you should compare reseller pricing before committing.
Is Gamma VoIP worth it? Gamma VoIP is worth considering if your business wants a reliable, scalable hosted phone system from a major UK telecoms provider, but it will be a good fit if you need:
Hosted VoIP calling
Gamma Horizon phone system access
Desk phones, softphones and mobile apps
Call forwarding, hunt groups and voicemail
Number porting
Call bundles
Multi-site phone management
Remote and hybrid working support
UK-based telecoms infrastructure
Reseller-led setup and support
But Gamma is not always the best fit for businesses that want a DIY app, deep PBX control or fully self-hosted telephony.
What is Gamma VoIP? Gamma VoIP is a cloud-based business phone service delivered primarily through Gamma Horizon, a hosted PBX platform that replaces traditional on-site phone systems.
With Gamma VoIP, you can:
Make and receive calls over the internet using UK numbers
Use desk phones, softphones, and mobile apps
Manage users, call flows, hunt groups, and numbers via a web portal
Support hybrid and remote working without complex infrastructure
A key differentiator is that Gamma operates its own UK network and also supplies wholesale connectivity to many other telecom providers, which contributes to its reliability.
Gamma VoIP pricing 2026 guide Gamma VoIP pricing is usually sold through approved partners, resellers and telecoms providers rather than as a simple direct online checkout.
Most businesses pay per user, per month, with extra costs depending on call bundles, features, setup and handsets.
Product / component Typical 2026 price estimate What affects the price Best for
Gamma Horizon user
From around £9-£12+ per user/month
Package, features and reseller pricing
Small businesses and SMEs
Mid-range Horizon package
Around £12-£18 per user/month
Call bundles, apps and call management features
Growing teams
Advanced Horizon setup
Around £18-£25+ per user/month
Call queues, reporting, integrations and complex routing
Larger or multi-site teams
UK call bundles
Included or added monthly
Landline, mobile and international call usage
Businesses with regular outbound calls
VoIP handsets
Around £80-£250 one-off per handset
Desk phone model and quantity
Office-based teams
Setup and onboarding
Free, included or one-off
Number porting, configuration and sites
Businesses switching provider
Number porting
Included or quoted separately
Quantity and number type
Businesses keeping existing numbers
Contract length
Often 12-36 months
Longer contracts may reduce monthly cost
Cost-conscious buyers
Not sure if your Gamma VoIP quote is competitive? Gamma VoIP is usually sold through partners, resellers and telecoms providers, which means two businesses can receive different quotes for similar Gamma Horizon setups.
Before signing a Gamma contract, compare:
monthly cost per user
call bundle allowance
handset costs
setup and onboarding fees
number porting costs
call recording charges
Microsoft Teams integration costs
contract length
support response times
cancellation terms
whether VAT is included
A cheaper Gamma quote is not always better if it excludes support, handsets, call bundles or setup.
Compare Gamma VoIP quotes against other UK providers before choosing.
Free quotes • No obligation • Save up to 40%
Who Gamma is best for
Gamma is usually a good fit if you:
Want a reliable UK-hosted cloud phone system
Prefer predictable per-user pricing
Are a growing SME or multi-site organisation
Need easy onboarding and scalability
Want a provider with strong UK telecoms heritage
Who Gamma is not great for You may want to look elsewhere if you:
Want full control over hosting and infrastructure
Prefer to self-manage a PBX like 3CX
Need very niche hardware or bespoke telephony setups
Are looking for a consumer-style VoIP app with instant sign-up
Benefits of Gamma VoIP
Competitive pricing compared to many enterprise VoIP platforms
Reliable UK network and infrastructure
Horizon platform is easy to deploy and manage
Supports desk phones, softphones, and mobile apps
Scales well as businesses grow
Integrates with tools like Microsoft Teams and CRMs
Downsides to consider
Hosted on Gamma’s infrastructure, limiting deep customisation
Less flexible than fully self-hosted PBX solutions
Feature set depends on Horizon package chosen
Gamma Horizon explained Gamma Horizon is Gamma’s hosted business phone system.
It is designed to replace traditional on-site PBX systems and give businesses a cloud-based way to manage calls, users, numbers and routing.
Gamma Horizon feature What it does
Hosted PBX
Replaces an on-site business phone system
Online portal
Lets businesses manage users, numbers and call settings
Desk phone support
Works with supported VoIP handsets
Softphone support
Lets users call from a desktop or laptop
Mobile app
Supports business calling from mobile devices
Hunt groups
Routes calls to available team members
Call forwarding
Redirects calls to mobiles, teams or other numbers
Voicemail
Captures messages when users are unavailable
Number porting
Allows businesses to keep existing numbers
Call bundles
Helps manage UK calling costs
Multi-site support
Centralises phone management across locations
Gamma VoIP Features
Feature Available with Gamma VoIP? Why it matters
Hosted VoIP calling
Yes
Replaces traditional phone lines
Gamma Horizon platform
Yes
Desk phones
Yes
Useful for office-based staff
Desktop softphone
Yes
Make calls from computers
Mobile app
Yes
Support hybrid and remote working
Number porting
Yes
Keep existing phone numbers
Call forwarding
Yes
Redirect calls to mobiles or teams
Hunt groups
Yes
Share incoming calls across teams
Voicemail
Yes
Capture missed calls
Voicemail to email
Package dependent
Send voicemail alerts to inboxes
Call recording
Package/add-on dependent
Useful for compliance, sales and training
Call reporting
Package/add-on dependent
Helps monitor call performance
CRM integration
Available
Connect calls with customer data
Microsoft Teams integration
Available
Useful for Teams-based businesses
Multi-site management
Yes
Manage multiple locations centrally
Call bundles
Available
Control outbound call costs
Who is Gamma VoIP best for? Gamma is usually best for businesses that want a reliable UK-hosted phone system with enough flexibility for growth.
Business type Is Gamma a good fit? Why
Small businesses
Yes
Affordable hosted VoIP with standard business features
Growing SMEs
Yes
Scales well as users and sites increase
Multi-site businesses
Yes
Centralised management across locations
Remote teams
Yes
Softphone and mobile app support
Desk-based teams
Yes
Works well with supported VoIP handsets
Teams-based businesses
Maybe
Gamma can integrate, but compare with Microsoft Teams Phone
Call centres
Maybe
Compare with RingCentral, 8×8, Aircall and Dialpad
Micro-businesses
Maybe
Could be more than needed for one or two users
Businesses wanting self-hosting
No
3CX or other PBX options may suit better
Businesses wanting the cheapest VoIP
Maybe
Compare against bOnline and other SME providers
Gamma VoIP vs alternatives Gamma is a strong UK-hosted VoIP option, but the best provider depends on your business size, budget and feature requirements.
Provider Best for Pricing position
How it compares with Gamma
Gamma Horizon
UK SMEs and multi-site businesses
Budget-to-mid / mid-range
Strong UK-hosted VoIP with reseller support
RingCentral
Feature-rich unified communications
Mid-to-premium
More app-first with stronger UC features
8×8
Call centres and international teams
Mid-range
Stronger for contact centre and global calling
bOnline
Small UK businesses
Budget-to-mid
Often simpler and cheaper for small teams
BT Cloud Voice
Managed telecoms from BT
Mid-to-premium
Better for businesses wanting BT-managed support
Vodafone Business VoIP
Existing Vodafone customers
Mid-to-premium
Better for mobile and connectivity bundling
Microsoft Teams Phone
Microsoft 365 users
Mid-range
Best for Teams-based organisations
Zoom Phone
Zoom-first teams
Mid-range
Better for Zoom-heavy workplaces
Vonage
Flexible cloud communications
Mid-range
More app-led and communications-platform focused
3CX
Self-managed PBX control
Varies
Better for businesses wanting more configuration control
How to buy Gamma VoIP without overpaying Gamma VoIP is typically purchased through approved partners, telecoms resellers or comparison services rather than a simple online checkout.
This can be a good thing because a reseller can help with setup, number porting, handsets and support.
However, it also means pricing can vary.
Before buying Gamma Horizon, ask for a written quote that clearly shows:
the Gamma Horizon package
cost per user
number of users
included call bundles
handset costs
setup fees
number porting fees
call recording costs
support level
contract length
renewal terms
early termination fees
You should also compare Gamma against at least two alternatives, especially if you are unsure whether hosted VoIP, Microsoft Teams Phone, SIP trunking or UCaaS is the best fit.
Compare Gamma VoIP quotes now to check whether you are getting a fair deal.
Gamma VoIP quote checklist Before choosing Gamma, make sure your quote answers these questions.
Question Why it matters
Which Gamma Horizon package is included?
Are UK calls included?
Call bundles can affect monthly costs
Are handsets included or extra?
Desk phones can add upfront or monthly costs
Is number porting included?
Keeping existing numbers is important for most businesses
Is setup included?
Configuration and onboarding may cost extra
Is call recording included?
Often package-dependent or charged separately
Is Microsoft Teams integration included?
Teams setup may require extra configuration
What support is included?
Reseller support can vary significantly
How long is the contract?
Longer contracts may reduce flexibility
What happens if you cancel early?
Early exit fees can be expensive
Can the system scale?
Important if you are adding users or sites
Is broadband suitable for VoIP?
Poor connectivity can affect call quality
Our Verdict on Gamma VoIP Gamma VoIP is a strong option for UK businesses that want a reliable hosted phone system, especially if they are looking at Gamma Horizon for cloud calling, desk phones, softphones, mobile apps, number porting and multi-site support.
It is particularly well suited to SMEs, growing businesses and organisations that want a proven UK telecoms platform rather than a lightweight app-only VoIP tool.
However, Gamma is usually sold through partners and resellers, so the final deal depends heavily on the quote you receive. The same Gamma Horizon platform may be packaged differently depending on user numbers, call bundles, handsets, setup, support and contract length.
For that reason, we would not recommend choosing Gamma based on brand name alone.
Final recommendation: Gamma is absolutely worth comparing, but get more than one quote and check the full monthly cost before signing.
Compare Gamma VoIP quotes against leading UK providers and see whether your business could save up to 40%.
Gamma VoIP FAQs Is it better to buy Gamma VoIP directly or compare quotes?
Gamma VoIP is usually sold through partners and resellers, so comparing quotes is often the better route. It allows you to check whether your Gamma Horizon package, user pricing, call bundles, handsets, setup and support are competitive against other UK VoIP providers.
Why do Gamma VoIP prices vary between quotes?
Gamma pricing can vary because resellers may package Horizon differently. User numbers, call bundles, handsets, setup, number porting, support level and contract length can all affect the final monthly cost.
Should I compare Gamma against other VoIP providers?
Yes. Gamma is a strong hosted VoIP option, but businesses should compare it against alternatives such as RingCentral, 8×8, bOnline, BT Cloud Voice, Vodafone, Microsoft Teams Phone and 3CX before signing a contract.
Is Gamma a VoIP provider or a reseller?
Gamma is a UK telecoms provider that operates its own network and delivers VoIP services primarily through its Horizon hosted phone system. Unlike many brands, Gamma is also a major wholesale provider supplying infrastructure to other telecom companies.
What is Gamma Horizon?
Gamma Horizon is Gamma’s cloud-based hosted phone system that replaces traditional PBX systems and allows businesses to make and receive calls over the internet using desk phones, softphones, or mobile apps.
How much does Gamma VoIP cost?
Pricing is usually per user, per month and typically starts from around £9–£12 per user depending on the Horizon package, call bundles, and features required. Exact pricing is usually provided via a reseller or comparison service.
Does Gamma VoIP include call bundles?
Yes. Many Horizon packages include generous UK call allowances, often covering thousands of landline and mobile minutes per user, though this varies by package.
Is Gamma VoIP suitable for small businesses?
Yes. Gamma Horizon is widely used by UK SMEs because it’s easy to deploy, affordable, and scalable. It works just as well for small teams as it does for growing or multi-site businesses.
Can Gamma VoIP support remote and hybrid working?
Yes. Gamma supports softphones and mobile apps, allowing users to make and receive calls from anywhere with a stable internet connection.
Do I need Gamma broadband to use Gamma VoIP?
No. Gamma VoIP can run over any suitable business-grade internet connection, although call quality will depend on bandwidth, stability, and network configuration.
Can I keep my existing phone numbers with Gamma VoIP?
Yes. Number porting is usually supported, allowing businesses to move existing geographic or non-geographic numbers across to Gamma Horizon.
Is Gamma VoIP reliable?
Gamma is known for strong reliability because it operates its own UK network and infrastructure. This is one of the main reasons it’s widely used by UK businesses and telecom partners.
Is Gamma VoIP flexible compared to other systems?
Gamma Horizon is flexible for most standard business needs, but it is less customisable than fully self-hosted PBX platforms. Businesses needing deep control over hosting may prefer alternatives like 3CX.
Is Gamma VoIP good for multi-site businesses?
Yes. Horizon is commonly used by multi-site organisations because it allows centralised management of users, numbers, and call flows across locations.
How does Gamma VoIP compare to Microsoft Teams Phone?
Gamma is a dedicated phone system, while Teams Phone is a calling layer added to Microsoft Teams. Gamma suits businesses that want a traditional phone system experience, whereas Teams Phone suits organisations already embedded in Microsoft 365.
How do I buy Gamma VoIP?
Gamma VoIP is typically purchased through approved resellers, partners, or comparison platforms rather than directly online. This usually includes setup, onboarding, and support.
Compare Gamma VoIP quotes now Gamma Horizon can be a strong business VoIP choice, but the best deal depends on your users, features, call volume, handsets, support and contract length.
Compare Gamma VoIP against trusted UK providers and check:
monthly user costs
call bundles
setup fees
handset pricing
number porting
support level
contract length
alternatives to Gamma Horizon
Free quotes • No obligation • Compare trusted UK VoIP providers
Compare Gamma VoIP quotes and see whether your business could save up to 40%.
Related VoIP guides & comparisons
Hi, I’m Ally Cox , a senior copywriter and blogger at CompareYourBusinessCosts.co.uk, the UK’s trusted platform for comparing business services.over a decade of experience in the B2B sector, I specialise in simplifying complex topics like leased lines, VoIP, business energy, HR and payroll solutions, accounting software, and EPOS systems .HR, copywriting, and business operations- from clocking-in systems to card machines and office technology .informed, confident decisions when choosing products and services that improve efficiency and save money.
