Our story

Sound of Data has always been a company that prefers doing over talking. It’s a mindset you immediately recognize when you get to know us. Rooted in Rotterdam, this no-nonsense mentality is at the core of everything we do: automate where possible, and be personal where necessary. That Rotterdam attitude, “actions, not words”, is part of our DNA and still defines how we work and how we engage with our clients.

How it started

In the early 1990s, Sound of Data came to life. Long before mobile phones, email, or social media were commonplace. Our founder, and father of our current CTO, built a platform that was already capable of handling high volumes of phone calls at the time: think TV voting lines, weather information services, or even the exact time number.

Back then, our office was literally located next to the KPN tower. Not by coincidence, but because that was where you had access to the fastest lines. It was the era of landlines, answering machines, and the “Henny Huisman effect,” and we were right at the heart of it.

Today, we’ve grown into a trusted partner for major brands, media organizations, and non-profits, supporting omnichannel customer engagement across virtually every type of interaction.

Built on connection

Connection is at the heart of both our name and our approach. For us, it’s about real interactions. Between people and between systems. We believe in the power of dialogue at every touchpoint, because a single conversation can make or break a relationship. That requires attention to timing, relevance, technology, and human connection.

Our solutions are designed to strengthen every interaction. From infrastructure to intelligent routing, from automated workflows to live conversations. Everything we build serves one purpose: enabling connection.

The power of the moment

Every customer interaction matters. Whether it’s digital, voice-based, automated, or personal. Timing and quality determine its success. Even perfect content can lose its impact if the connection fails or if the channel doesn’t match the customer’s context.

That’s why we deliver solutions that are not only technically robust, but also aligned with the human experience of communication. Because the real value of accessibility lies in how heard a customer feels.

Everything has to work together

We don’t just deliver technology, we provide everything needed to make your customer contact strategy truly effective. Whether it’s traditional telephony, omnichannel platforms or autonomous process automation. It’s all about cohesion.

Our approach is built on three pillars: Routing, Handling & Performing. This means:

Routing: ensuring incoming interactions always reach the right destination
Handling: managing every interaction effectively, regardless of the channel
Performing: optimizing customer interactions and outcomes

Everything needs to be perfectly aligned to create real value.

Closing the circle

What once started next to the KPN tower has now come full circle. Sound of Data is now part of KPN. As of January 30, 2026, Sound of Data operates within KPN’s Business Market division. Within this context, we continue to operate as an independent unit, with a clear focus on international routing, BYOC, CCaaS and advanced voice applications.

This combination of independence and connection allows us to keep doing what we do best, while benefiting from the scale, stability and expertise of KPN within a broader business environment.