Sales Director
Gamma Horizon is an award-winning, and market-leading hosted phone system that is increasingly being adopted by businesses across the UK. In this guide, we share the current pricing for Gamma Horizon, along with a bit of information about the functionality you can expect at each price point.
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Gamma's Horizon phone system is a cloud-hosted VoIP platform that provides businesses with extensive communications functionality and features. Sometimes referred to simply as Horizon VoIP, the Gamma Horizon VoIP PBX, or just "Horizon phone", it's one of the most established hosted telephone systems on the UK market.
Gamma Horizon, a replacement to traditional business telephone systems, is hosted in the cloud rather than on your site. Unlike many international players in the VoIP market, such as RingCentral, Zoom, Microsoft and so on, Gamma provides its Horizon service through a network of specialist partners rather than selling direct. The benefits of this are numerous, but probably most importantly, by purchasing your gamma phone system through a smaller partner, you get a much better customer support experience from people that know you and your business. If you've been comparing "gamma horizon" against other horizon telephone systems on the market, this partner-led support model is usually the deciding factor for growing UK businesses.
As an independent telecoms company, we're continually looking for the best tech for our customers and regularly review the latest products coming to market. When we find a product, we think we can put our name to, recommend it and provide it to our customers. In another recent post, we've reviewed Gamma Horizon, so you can see why we believe it's an excellent fit for businesses of all sizes in the UK. If you're searching for an honest gamma voip review or a straight-talking horizon telephone system review before you commit, that article walks through the platform in full, alongside genuine gamma horizon reviews from businesses we've supported.
Please bear in mind that the pricing provided in this section is indicative and is only meant to illustrate the cost of Gamma Horizon. The price you pay will always be based on your specific feature and device requirements. If you've seen gamma horizon costs 2022 figures quoted elsewhere online, treat them with caution — like most horizon pricing, the numbers below reflect current 2026 rates rather than outdated gamma pricing 2025 figures still floating around some comparison sites.
So, how much is Gamma, and how much does Horizon cost in practice? Below is our breakdown of typical gamma horizon pricing per month across the four core packages, so you can get a feel for realistic horizon telephone system price expectations before you request a bespoke quote.
Ok, so we've given you an overview of the pricing you can expect with Gamma Horizon, but let's now take a quick look at the features, including those included as standard and those that are supplementary. It's worth flagging early on that there isn't a genuinely free tier — if you've searched for "what's included in Gamma's free plan?", the honest answer is that Gamma doesn't offer a completely free package, but every horizon phone system does come with a generous free call bundle built into the entry-level price, which is about as close as it gets.
Gamma Horizon is packed full of features and comes with generous free call allowances, even if you opt for the Standard product. Here is a summary of what you will get:
Pro, Integrated and Unified packages include all of the standard features, plus:
The great thing about Gamma and its Horizon platform is that you can quickly build a bespoke package based on your requirements. While we have shared some example pricing, that's precisely what it is, and you can mix and match features in all of the packages we've mentioned to build something perfect for your business.
One of the features customers ask about most is the Horizon phone app — sometimes called the Horizon dialer — which lets you make and receive calls on your business number from a mobile handset, tablet or laptop. Combined with the Horizon phone desktop app for PC and Mac, this gives your team a genuinely flexible horizon voip pbx that works just as well from a kitchen table as it does from the office. Whether you're searching for gamma phones with matching desk handsets or a fully software-based unlimited Horizon app setup with no physical hardware at all, the platform flexes to suit either approach, and you can switch between the two as your business grows.
Horizon Collaborate (included as standard in the Unified package, and available as an add-on elsewhere) takes your horizon voip phone system beyond simple calling. It layers instant messaging, presence indicators, screen sharing and video conferencing on top of your existing gamma horizon voip pbx, so teams working across multiple sites — or from home — can collaborate as if they were sat in the same room. For businesses already invested in Microsoft Teams or similar tools, Gamma Horizon Collaborate can often sit alongside these platforms rather than replacing them outright, giving you the choice of how deeply you integrate it.
If crystal-clear call quality is non-negotiable for your business — think call centres, healthcare providers or anyone handling high call volumes — it's worth asking your partner about Horizon Premium Assured. This is Gamma's enhanced quality-of-service tier, prioritising voice traffic across the network to minimise jitter, latency and dropped calls. It typically carries a modest premium over standard horizon telephone systems pricing, but for businesses where every call matters, the Horizon Premium Assured price is usually a worthwhile investment rather than an optional extra.
A hosted horizon voip system is only as good as the internet connection carrying it, which is why so many businesses choose to bundle their Gamma Horizon phone system with connectivity from the same provider. As a Gamma internet provider, we can supply everything from standard broadband through to dedicated leased lines and FTTP, all engineered specifically to prioritise voice traffic. This is also why some of the pricing above is marked as conditional on taking out a connection with us — bundling gamma internet with your horizon phone system means one point of contact, one bill, and a network that's been tuned to keep call quality consistently high.
Alongside fixed-line and hosted VoIP services, Gamma mobile for business gives you mobile SIMs and tariffs that can be managed and billed alongside your Horizon phone system. This means a single point of contact for gamma mobile support, consolidated invoicing, and the option to integrate mobile numbers with your Horizon setup so calls, voicemail and messaging all flow through the same joined-up system, rather than juggling separate providers for desk phones and mobiles.
If you already have an on-premise PBX and aren't quite ready to move fully to a hosted horizon telephone system, Gamma also offers SIP trunking as a halfway step. Gamma SIP trunk pricing tends to be charged per channel plus a call bundle, and is generally more cost-effective than traditional ISDN lines, which Openreach has been phasing out across the UK. It's a sensible option if you want to modernise your call handling now, while still keeping the door open to a full Horizon hosted phone system migration further down the line.
Because Gamma doesn't sell Horizon directly to end users, the partner you choose matters just as much as the platform itself. Gamma works with a wide network of resellers across the UK, and partners can be accredited at different levels, with Gamma platinum partner status reserved for those meeting the strictest standards for technical competence, customer service and sales performance. When you're comparing a gamma reseller or a gamma partner uk, it's worth asking directly about their accreditation level, their in-house support team, and how quickly they respond when something needs fixing — this is usually a far better indicator of day-to-day service than pricing alone.
If you're already a Gamma customer and need help, your first port of call should always be your chosen partner rather than Gamma directly, since they hold your account configuration and billing details. That said, if you do need a gamma customer service number or a general gamma contact number for escalations, your partner will be able to provide the right gamma horizon contact details for your account, alongside ongoing gamma horizon support for day-to-day queries.
Horizon is one of the most widely deployed hosted telephone systems in the UK, powering phone systems for tens of thousands of businesses through Gamma's partner network. While exact hosted telephone systems market share figures shift year to year as providers report differently, Horizon consistently ranks among the largest platforms in the UK by seat count, which matters practically: a bigger install base means more third-party integrations, more experienced partners to choose from, and a platform that's had years of real-world refinement rather than being a newer, less-proven entrant.
How much does Gamma cost, and how much does Horizon cost per user?
Gamma horizon pricing per month typically starts around £9.95 per user for the Standard package, rising to roughly £22.95 for fully-loaded packages with handsets, mobile apps and Collaborate included. Your actual gamma horizon costs will depend on call bundles, hardware and any add-ons like Premium Assured.
What's included in Gamma's free plan?
There isn't a completely free plan as such — every tier is a paid subscription — but the entry-level Standard package includes a very generous free call bundle (2000 landline and 2000 mobile minutes per user, per month) as standard, which covers most day-to-day usage for typical office-based teams.
Is Gamma Horizon the same as VMware Horizon?
No, and this is a common point of confusion. VMware Horizon is a completely separate product used for virtual desktop infrastructure, with its own vmware horizon pricing structure that has nothing to do with business telephony. Gamma Horizon is a hosted VoIP phone system; if you were actually looking for desktop virtualisation pricing, you'll need VMware's own documentation instead.
How much is a Gamma SIP trunk subscription?
Gamma SIP trunk cost is usually structured per channel with an associated call bundle, and tends to undercut legacy ISDN pricing considerably. Your partner can model this against your current call volumes to give you an accurate gamma subscription cost.
Do prices differ between Gamma and its partners?
Yes. Gamma sets wholesale rates, but the retail horizon price list you're quoted comes from your chosen partner, which is exactly why gamma horizon pricing can vary between resellers even though the underlying phone gamma platform is identical.
Can I get a completely unlimited Horizon VoIP package?
Most providers offer generous, effectively unlimited Horizon VoIP call bundles for UK landline and mobile numbers, subject to a fair usage policy, rather than a literal uncapped tariff — this covers the vast majority of business call patterns without unexpected overage charges.
How do I contact Gamma or my provider about my account?
For billing, technical issues or general queries, you should contact your Gamma partner first using the gamma voip contact details they provided when you signed up, rather than searching for a generic gamma contact number, since your partner holds your specific account and configuration.
With over 25 years’ experience at T2k, Lee began his career as a telecoms engineer before progressing to Sales Director. He leverages his foundational technical knowledge to provide businesses with impartial, expert advice on modern communications, specialising in VoIP and cloud telephony. As a primary author for T2k, Lee is dedicated to demystifying complex technology for businesses of all sizes.
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