How Reliable Is The 8×8 Business Phone System?

When we’re helping businesses upgrade their phone system, one of the most common priorities is a funny one: it needs to actually work. It sounds so obvious, but we’ve seen firsthand through projects such as our work with Plessey just how important it is that a business phone system actually works for the people using it, rather than introducing a new system that’s too complicated and gets abandoned by users.

That’s one of the reasons why the 8×8 business phone system ends up being such a popular choice and, when installed, a solution that genuinely improves the way teams make and take calls. 8×8 is flexible and intuitive, and operates in the cloud so it can be used anywhere on multiple devices. 

If you’re used to traditional desk phones and physical phone lines, moving to this kind of cloud-based infrastructure can understandably feel like a big step. You might be wondering whether relying on the cloud could actually make your calls less reliable, or what happens if something goes wrong.

Worry not, 8×8 is incredibly reliable. Let us explain in more detail. 

How Reliable Is 8×8?

The 8×8 business phone system operates through the cloud. In simple terms, this means that your calls are managed via the internet rather than a traditional phone line. By operating via the cloud, 8×8 is incredibly flexible. Teams can make and receive calls wherever they’re working, whether that’s from desk phones, mobile handsets, or the intuitive desktop app.

Naturally, this does mean that your wider connectivity plays a role in how reliably you can use the cloud phone system. However, the reliability of 8×8 itself is something that the platform has been specifically engineered to protect. 

8×8 provides a 99.999% uptime SLA across its UCaaS and CCaaS services, with this SLA covering both service availability and call quality. This is an incredibly high level of availability and means that you can expect your phone system to be there when your business needs it. 

What Makes 8×8 So Reliable?

A large part of the 8×8 reliability comes down to redundancy. 8×8 doesn’t rely on one single piece of infrastructure doing one job. Instead, the platform incorporates multiple layers of redundancy, with automatic failover and disaster recovery built into the system. If one part of the system experiences an issue, there are alternative routes and resources for 8×8 to keep working, rather than everything coming to a halt. 

Does 8×8 Ever Go Down?

With 99.999% uptime, the likelihood of 8×8 ever going down is very slim. However, it’s important to be realistic here. No cloud phone system can promise that absolutely nothing will ever go wrong. 

8×8 is no exception, and we actually recently experienced 8×8 going down for the first time in well over three years in late July 2026. It was a pretty short outage that happened in the middle of the night; very few of our clients noticed or were affected, so all in all we’d say that’s pretty good going given that it’s the only significant hiccup we’ve witnessed in such a long period of time.

8×8 is fully transparent about its service status and historical incidents, and you can check exactly how the business phone system is performing at any time over on its service status page.  

What Can Affect 8×8 Call Reliability?

While the 8×8 business phone system is designed to be highly reliable, there are still some external factors that can have an impact on your broader experience.

Because 8×8 is a cloud phone system, your wider communications infrastructure matters. A strong and stable internet connection is key. If your office network is struggling, you could experience poor call quality even though 8×8 is operating normally. 

The same applies to other elements of your setup. If teams are making calls via their mobiles, they need to have flexible mobile plans on the right networks with solid data allowances. If you’re making calls via desktops and physical desk phones, this hardware needs to be up to scratch too.

Get 8×8 With Agile Comms

Ultimately, we’d say that 8×8 is one of the most reliable business phone systems available, and its 99.999% uptime commitment should give you plenty of reassurance if you’re considering moving to the cloud for the first time. 

However, reliability isn’t just in 8×8’s court, and it’s important that your entire communications setup lays the foundations for your phone system to work as it should. That’s where we can help.

At Agile Comms, our expert team can scope your phone system requirements, recommend the right 8×8 setup (or setup of an alternative platform if we think it’s more suitable), configure your call flows and features, and provide training rather than leaving you to figure everything out. If your connectivity and hardware aren’t suitable, we can help with that too, ensuring that you’re firing on all fronts and have the right infrastructure available to get the most from 8×8.

Whether you want to talk through whether 8×8 could work for your business, get a demo, or speak to us about installation, please get in touch with us today.