About

We deliver innovative elegant solutions
for mobile operators, honestly.

We design and deliver solutions that give operators clear insights and comprehensive control over their signalling, with a focus on security, roaming, SMS monetisation and analytical applications.

We’re rated as a top innovator and Tier 1 vendor in Signalling Firewall, Steering of Roaming and SMS Firewall in independent research. We proudly serve more than 800 million subscribers worldwide.

We have continually broken new ground since our inception in 2005, when we brought together a team with a depth of expertise in signalling, technology, and IP not seen elsewhere.

We are not held back with preconceived notions of how things should or shouldn’t be done. With this, plus our creativity, and huge input from customers, we will remain leaders in innovation, and the commercial and common-sense choice for mobile network operators.

Leadership Team

What Our Customers Say

“We were in urgent need of a replacement for our SoR provider. Cellusys has lived up to its #1 position, showing excellence in collaboration and flexibility.”

Natasha Degroote, Head of Roaming

5 Case Studies

What Our Customers Say

“Intelligent network selection is a key feature of the iBASIS Global Access for Things service. In addition to our own patented technology, the Cellusys SoR platform provides a key component for selecting the right network for the right device at the right time,”

Ajay Joseph – CTO

5 Case Studies

What Our Customers Say

“Since integrating Cellusys VFW, we have witnessed remarkable improvements in flash call security and fraud prevention’’

Vusal Heybatov – Head of Core Network

5 Case Studies

What Our Customers Say

“Cellusys Signalling FW is wise. Many actions that could not be done on other networks nodes, could be done on Cellusys SFW”

Hikmet Yavuzer – Voice Core Operations Manager

5 Case Studies

Join our award winning software engineering team

“With the Cellusys DLX
intern programme you get
involved in every part of the development structure from designing, to coding,
to testing and deployment.

– EOIN O’BRIEN
Cellusys Intern 2015
(DCU CA 2016)

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