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Our voice platform

Move to a platform built
for you

The Nebula platform behind CallSwitch One is 100% owned IP - British-built, cloud-native, and engineered for partners who want to move fast.

Swift customer migration to the CallSwitch One platform

Market Evolution

The next phase of UCaaS is already underway

The UK UCaaS market is entering a new cycle. We’re no longer just seeing on-premise users move to the cloud - we’re seeing large volumes of cloud-to-cloud migrations as first-generation hosted PBX contracts come up for renewal against the backdrop of fewer vendors.

20%

fewer distinct UCaaS providers are expected to be operating in the UK by 2028, driving increased migration. - PWC

Move on-premises businesses to a Cloud PBX solution

“Renewal cycles create a natural moment to reassess your platform and move your base to something more flexible, more profitable, and easier to support.”

Sam Giggle, MD of Channel - Nebula
Sam Giggle, Nebula Channel MD

When platforms change,
partners feel it first

Nebula platform

We didn’t borrow our platform - we built it

Across the UK, some providers are moving to global, third-party stacks, but many partners are finding it results in slower feature evolution, complex deployments, and support teams without real control. At Nebula, we took the opposite approach: we built our own platform in-house, owned end-to-end and designed specifically for the UK channel.

CallSwitch One - built in-house in the UK
Why Callswitch One

190,000 users.
Zero guesswork.

Migration shouldn’t be a learning exercise at your customers’ expense. In the last 18 months alone, we’ve migrated 190,000 users onto the Nebula platform. That experience has shaped a process designed for real-world MSP environments, including automation at scale, and all backed up by UK-based engineering and support.

Managed platform migrations for MSPs

“There isn’t another vendor in the market that’s migrated almost 200,000 users within 18 months.”

Jez Pickering, Head of CX - Nebula
Jez Pickering, Nebula Head of CX

About our platform

Why owning the platform changes everything

You don’t need to be a software engineer to benefit from owned IP - but you do benefit from what it enables.

Check it out
CallSwitch One - Complete VoIP & UCaaS platform
Owned IP

No third-party roadmaps. If the market needs a feature, we can build it.

Proprietary UCaaS solution and VoIP apps
Cloud-native architecture

Designed for modern usage patterns, with resilience and security built in.

Secure and reliable Cloud-based infrastructure
Partner-first model

Built to support predictable recurring revenue and long-term customer retention.

Built for MSPs and wholesale channel resellers

A better home for your customer base

If your current provider is moving toward a model that feels like a "forced march" into a global vendor's ecosystem, you have a choice. You can stick with the complexity, or you can move your base to a home that was built specifically for the UK channel.

See the platform
UK-based UCaaS platform and support

Ready to discover more?

Let’s show you how CallSwitch One can supercharge your revenue.

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