Making Vital Connections

Specialists in fully managed cloud contact centre solutions

Matching patient call demand with clinical capacity, while monitoring key operational targets.


Providing business with critical customer connections.

Public & Voluntary Sectors

Ensuring essential services connect with the people who need them.

A Fully Managed Cloud CCaaS Solution

A managed cloud solution, ensuring every customer call is connected to the right part of your organisation. Connect your team across contact centres, those in the field or at home, with all of your customer conversations, so you can deliver a personal, 24/7 customer experience. We have over 15 years’ experience of helping organisations like the NHS to connect with their customers and deliver outstanding service when it really counts.

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The Sesui Difference

We’re problem solvers, we look at every angle. The things you hadn’t considered, or didn’t even know were possible. It means we can truly make a difference, with solutions that help not-for-profit organisations achieve more with finite resources, and commercial organisations to stand out from the competition. We call this the Sesui difference — it’s nimble, elastic and sustainable.

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99.999% uptime

We're reliable

We're reliable — our network's up 99.999% of the time

100% track record

We've got a great track record

Our 100% track record — we've never lost a client due to poor performance

We're recommended

We're recommended

We're recommended — 95% of our clients recommend us to others

We're responsive

We're responsive

We're responsive — we'll make most client change requests within 2 hours

We're strong

We're strong

We're strong — with 3 UK-based data centres using 6 carriers

We're privately owned

We're privately owned

We're privately owned — a British company in business for 15 years

We're always here

We're always here

We're always here — 24/7/365

We're Secure

We're secure

We're secure — Cyber Essentials Certified, PCI DSS Compliant

We're Approved

We're approved

We're approved — Crown Commercial Service provider, Practice Index Approved Supplier

Clients, Partners & Accreditations

With telephone donations increasing year-on-year, it was important our contact centre solution could adapt and grow alongside the St Martin-in-the-Fields Christmas Appeal. Sesui provides us with a high level of insight from the call data, and the team works with us to refine the process for next time.

When an OHES Environmental customer needs to contact us, it’s critical that they get through. Sesui supplies a level of reliability that means customers can call us and we can immediately meet their needs.

Kudos to Sesui for efficiently delivering a solid, scalable, real-time, flexible and responsive call management solutions across our ever-evolving environment.

Sesui are proud to have received our ISO/IEC 27001 Information Security Management certification following a comprehensive audit from the leading organisation in the field, BSI.

You can rest assured that we have: secure connections, devices and software; controlled access to our data; up-to-date devices; and full protection against viruses and other malware. All fully certified as part of the government’s Cyber Essentials scheme.

Cyber Essentials

If you’re in the public sector, you can purchase our solutions faster and more cost-effectively through the government’s G-Cloud framework, where we’re an approved Crown Commercial Supplier.

Crown commercial service approved

“Our customers don’t care where the team is based. All they want to know is that we’re committed to supporting all of our European territories. And thanks to the Sesui Virtual Contact Centre, we’re able to give our customers the service they expect, in their own language.”

Eight years ago Sesui became one of the stakeholders in our vision for the future, and we made the decision to put our phone system in the cloud. Back then the cloud was a Silicon Valley buzzword and not particularly ‘NHS’. But we did it and very quickly saw results.

We’re one of just a handful of approved communications providers on Practice Index, set up to help practice managers find the very best partners for their organisation.

Practice Index Approved Supplier
Call us: 03445 600 600