We’re not going to pretend that upgrading your phone system is a glamorous task, but it’s probably one that needs to be on your radar if you’ve not given it much thought in recent times. As your business grows and more teams work remotely or flexibly, those ageing office handsets and ‘that’ll do’ phone systems quickly become a blocker rather than a benefit. You might still be able to make and take calls, but the truth is that you could be missing out on the whole host of smarter features offered by business cloud phone systems. 

Business cloud phone systems are smarter, faster, and easier to use than any of the technology that has come before them. From advanced call routing and video functionality to real-time reporting and integration with CRM platforms, the best cloud based phone systems offer way more than just voice. They are scalable, secure, and cost-effective solutions, designed to make a real difference to the way your business communicates. 

With this in mind, we’ve pulled together our list of the five best business cloud phone systems to consider upgrading to in 2025. These are the platforms we think deliver the best balance of features, ease-of-use, and cost, and include the two solutions (CallSwitch One and 8×8) that we recommend and supply to our clients most regularly. Let’s look at how they (and the competition) stack up. 

8×8

If your business operates across multiple locations and requires the highest levels of functionality, 8×8 is one of the best business cloud phone systems available. It offers everything from voice and video to AI-powered analytics, all backed by a totally robust cloud infrastructure, intelligent call routing, and market-leading 99.999% uptime.

Where the 8×8 app really stands out among other options is the level of detail when it comes to performance and compliance. It also integrates neatly with other systems your team may be using, like Microsoft Teams and Salesforce. 

These impressive functionalities all come bundled together in one of the most intuitive and easy-to-use apps available, which allows staff to make and receive calls, transfer calls, and access voicemail wherever they are. Our clients love the level of reliability and control they get from this cloud based phone system, and it’s this functionality that makes 8×8 one of the top business phone systems we recommend to anybody looking to communicate both more easily and more powerfully. 

Great for: Businesses of all sizes looking for an all-in-one, secure phone system

CallSwitch One

CallSwitch One is a new platform and is also leading the way when it comes to feature-rich business cloud phone systems that unify your business communications into one streamlined system. Along with 8×8, it’s the main platform that we provide and support because it delivers real value and improved experience across the board.

We’ve gone into more detail about the top features of CallSwitch One in another article, but some standouts include brilliant functionality across desktop and mobile, full CRM integration capabilities, and advanced features spanning hunt group setup to SMS tools. It’s also one of few business cloud phone systems that packs everything into clear licensing tiers to ensure you can get the features you want and cut out any fluff that won’t add tangible value to your business. 

Plus, we’re able to both configure and set up the CallSwitch One platform and provide ongoing support and consultancy. At Agile Comms, we’ll work closely with you both pre- and post-rollout to ensure that everything is configured exactly how you want it. It’s this level of flexibility and power that makes it one of the very best cloud phone systems available right now. 

Great for: Flexibility and depth, bundled with top-tier support

RingCentral

The third option on our list of the best business cloud phone systems is RingCentral – one of the best-known names in this space. RingCentral is a robust, well-rounded platform that includes messaging, video, and call capabilities in one neat package. It can handle calls intelligently and promises a sleek interface, making it a favourite among organisations of all sizes.

In our eyes, where RingCentral doesn’t quite trump other options is the limited support options available. It’s only available directly, so you’ll be dealing directly with the vendor if you opt for this system rather than through a team like us, who can provide you with more tailored and dedicated advice. Nevertheless, if you feel confident managing your phone system yourself without ongoing touchpoints, it’s a solid option packed with features.

Great for: Businesses with the internal resources and capabilities to manage a phone system in-house

3CX

If you are looking for a budget-friendly option, 3CX could be a great fit for your business. It’s an open-platform phone system that provides decent functionality at a lower cost than some of the more feature-rich business cloud phone systems. 

3CX does the basics really well, including web-based management, a solid mobile app, and call queues. It also carries the benefit of one clear annual license cost (no per-user pricing), making it easy to scale without a hefty price tag. That said, this business phone system does require a bit more hands-on configuration than other options, and the user interface is a little less intuitive than our favourite systems. 

Great for: Budget-conscious businesses wanting core features and simple scalability

Microsoft Teams Phone

A good alternative to implementing a brand new system within your organisation can be to add to the capabilities of what you already use. For example, if you’re already using Microsoft Teams for things like video conferencing, you could use Microsoft Teams Phone to make and receive calls from within Teams and turn it into a single-pane-of-glass solution for chat, video and voice. 

While this solution is simple, convenient, and supplements skills your teams already have, it does have its limitations. Call routing options are fairly basic, and it lacks some of the more advanced tracking features found in the other cloud based phone systems on this list. Still, for organisations that just need straightforward voice calling layered on top of Teams, it can be a good choice. 

Great for: Organisations well-versed with the Microsoft Teams infrastructure

Go Cloud Based With Agile Comms

Whether you’re a small business making the switch to cloud communications for the first time or a larger organisation in need of a complete overhaul, the business cloud phone systems on this list can aid your transformation. 

At Agile Comms, we’re on hand to help you with your transition and will work with you to specify, implement, and support whichever system is right for your organisation. We understand how important it is that your workforce can communicate from everywhere, and we will take care to ensure that the system you are using is both the best on paper and the right fit for your needs.

To find out more about how we can help you and get your hands on the best business cloud phone systems, get in touch with us today for a quick consultation.