Best UK VoIP Providers 2025

Thanks to its unified communications and impressive no-per-user charge, 3CX offers competitive prices compared to other UK providers. Their prices factor in the type of plan you choose, alongside the number of concurrent calls you’ll need to make at any one time. In this review, we’ve focused on 3CX’s Enterprise tier; however, you can also choose from their Small Business and Pro tiers if you feel they suit your business (we’ve included a breakdown of prices for all tiers below.)

Annual licenses on the Enterprise tier - based on 30-50 users - are around £860 for self-hosted and £1220 for hosted. While this price doesn’t include call costs, even with these included, you’ll still save significantly by choosing 3CX over any other leading provider.

However, while it’s a great deal for many businesses, it’s not necessarily suited to all. As we mentioned, if you have high staffing levels and low to moderate call volumes, this is a steal. But say you run an extremely busy, highly staffed call centre, with agents taking multiple calls at once; your concurrent calls are likely very high, and annual fees will likely cost far more than with another more suited provider.

Here’s 3CX’s 2025 price list for its Small Business, Pro and Enterprise tiers.

Gamma Horizon’s pricing structure is based on a ‘per user per month’ model, charging a monthly subscription based on the number of users. Their services are available across four competitively priced tiers, catering to a range of budgets and technical requirements.

The most enticing part of their pricing is -  alongside these fixed tiers - you can also mix and match features across all packages. For businesses with specific needs, you’ll only ever pay for what you need and nothing else.

The fluid nature of its pricing makes it trickier to compare prices against other providers. However, based on the example tiers provided by Gamma, even Horizon’s higher tiers offer competitive prices against international providers like 8x8. This makes Horizon a good fit for UK-based businesses serving both local and national audiences.

Here’s a 2025 listing of Gamma Horizon package prices.

BOnline’s prices—even at the higher end—are remarkable for what’s available. They offer monthly subscription packages starting as low as £7 while also price-matching against similar VoIP services.

They also claim no hidden fees - which is accurate from looking through their site. This is likely a big deal for operations with limited funds - protecting them from expensive one-off charges.

Like many budget providers, BOnline’s Starter package is a taster of their popular features. However, it limits time-saving extras like onboarding and call minutes. It’s an ideal package for freelancers or solo business owners looking to dip their toes into VoIP; it may even be suitable for long-term use if you don’t make many outbound calls.

BOnline’s prices set them apart with their Unlimited Calling and Plus packages—both come with unlimited minutes, integration with popular business platforms, and a greater focus on collaborative tools. Though BOnline leans into VoIP features rather than hardware, their Unlimited Calling Plus package comes with your choice of IP desk phone for just a couple of pounds more per month.

Here’s a 2025 price listing for BOnline’s VoIP services:

8x8’s VoIP is available across five tiers. Its lower ‘unified communication’ tiers (X2 and X4) offer basic VoIP features for a relatively competitive price; however, solo or small business owners may find better deals for their needs elsewhere. That said, the X4 package does come with ‘monitor, whisper, and barge functions’ - a useful training feature allowing managers to listen in or assist staff on difficult calls.

Though 8x8’s upper ‘Contact Centre’ tiers are pricey, they pile on intuitive features like intelligent call routing, omnichannel support, and advanced analytics. For businesses with a budget, these features pay for themselves, offering valuable data insights and removing excess from customer service processes.

Although 8x8’s prices aren’t available on its site, we’ve done some research to give you an idea of their 2025 VoIP prices.

Compared to other AI-focused providers like Cloudtalk and Aircall, Dialpad’s prices are competitive, while (in most cases) offering superior features. Starter packages cater to varying budgets but have limited access to AI meetings, voice, and analytics. For a justifiable price increase though, Dialpad’s Pro tier removes these limitations while including cross-location support and better integration capabilities.

‍If you’re looking for consistent quality, Dialpad’s Enterprise tier promises 100% uptime. While this is hard for any provider to guarantee, this means Dialpad will prioritise your network connection against lower-paying customers. You’ll also get unlimited office locations and ring groups—ideal for global organisations with multiple teams per office.

You'll need to talk to Dialpad directly for a custom quote. But given the competitive rates of their other plans, we’d assume they’re reasonable.Here’s a 2025 price listing for Dialpad’s VoIP services:

With Phoneline+, Gamma keeps pricing simple, offering one monthly package. It’s hard to find fault with its pricing either, with one of the lowest rates among competitor services. It’s particularly suited to businesses wary of the digital leap, costing them very little to port their business landline number to a new service safely.

Phoneline+

RingCentral’s services are well-priced compared to competitors, offering AI-powered tools across all packages. Their business packages come with lots of goodies, even in lower tiers. In contrast, upper tiers (still reasonably priced) offer increased call minutes and handy features like call barging and call whisper.

With prices ranging from £ 13 to £30 per user per month, it’s not a bad deal for established companies looking to level up their VoIP.

‍RingCX and Contact Centre tiers ramp up RingCentral’s AI features. Here, you’ll find advanced interaction analytics and quality management tools, ideal for analysing business performance.

While Contact Centre pricing is only available by consultation, RingCX prices start at £52 per user per month. It’s fairly steep compared to competitors -  but considering the features, security, and global scalability - it’s not a bad deal for the right business.

Vonage’s prices are at the higher end of the market. While their packages are impressive across the board, smaller businesses are likely to find similar solutions at lower cost elsewhere. Its Max tier adds further value with Vonage’s signature integrations. Here, the price is justified based on integration with Salesforce and its many useful additions.

Vonage’s Contact Centre Priority and Premium tiers may appeal to larger operations, offering efficiency-boosting omnichannel features and AI-driven analytics. Packages are tailored to business needs for these tiers, but based on lower tiers, they’re unlikely to suit smaller budgets.

Here’s a 2025 listing of Vonage’s package prices: