About Us

Through our vertical market software we deliver empowerment, engagement and excellence. Our three companies TSS Public, TSS Blue and Topicus have outstanding track records in acquiring, developing and managing smart and progressive businesses driven by one mission: to create community engaging, operational excellent and end-user empowered software across specific vertical markets.

Vertical Market Software and Platforms

Topicus.com is a leading pan-European provider of vertical market software and vertical market platforms to clients in a select group of public and private sector markets. We build, acquire and manage industry specific software businesses which provide specialized, mission-critical and high-impact software solutions that address the particular needs of our customers.


One Mission

Our three operating groups have outstanding track records in acquiring, developing and managing smart and progressive software platforms with the same mission: to create customer empowering, community engaging and operational excelling vertical market software that benefit the trimaran of: organizations, professionals and end-users.


Our businesses continuously acquire and develop innovative solutions which enable our customers to achieve their objectives. With 100,000+ customers in 26 countries and a proven track record of solid growth, we are establishing a broad portfolio of software businesses to provide our customers and shareholders with impactful returns. We are currently active in the Netherlands, Germany, France, Belgium, Italy, Spain, United Kingdom, Denmark, Sweden, Finland, Poland, Iceland, Romania, Switzerland, Serbia and Portugal.


Collective Vision, Knowledge and Capabilities

Topicus and TSS capitalize on the collective vision, knowledge and capabilities of both parties to strengthen our long-term proposition. We have our own unique identities whilst having the same strong culture of entrepreneurship and proven craftsmanship combined with great focus and innovative strength. 

With our headquarters in Deventer, the Netherlands, and offices across Europe, we have over 8,000 employees generating consolidated revenues of EUR 494 million. This is facilitated by our three operating groups (TSS Blue, TSS Public, Topicus) that currently service customers in over 40 different vertical markets.


Autonomous Operating Groups

We operate as independent enterprises within a decentralized business model. TSS is in the hands of Group CEOs Han Knooren and Ramon Zanders and Topicus Operating Group is led by CEO Daan Dijkhuizen. Together with CFO Jamal Baksh they form the leadership team of Topicus.com.

Topicus.com at a Glance

26 European countries

We are operating in over 26 countries across Europe.

40 Vertical Markets

We serve more than 100,000 customers in 40 different vertical markets

8,000 employees

We have over 8,000 innovative and driven employees.

100 thousand customers

We help more than 100,000 customers achieve their objectives.

494 million revenue

Consolidated revenues €‎494 million.

Leadership Team

At the helm of Topicus.com Inc are Robin van Poelje as CEO, Daan Dijkhuizen as Group CEO Topicus Operating Group, Ramon Zanders as Group CEO TSS Blue and Han Knooren as Group CEO TSS Public. Together with CFO Jamal Baksh they form the leadership team of Topicus.com. With proven track records and a wealth of experience, this powerful team is united in growing the new Topicus.com with one mission in mind: to be the number-one vertical market software provider in Europe.

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About Constellation Software Inc (CSI)

Topicus.com Inc is proud to be part of the ecosystem of Constellation Software Inc (CSI). CSI acquires, manages and builds vertical market software businesses that provide mission-critical software solutions worldwide. CSI is a major player with a broad portfolio, working with over 125,000 customers in over 100 countries. Since it was founded in 1995, it has rapidly grown through a combination of acquisitions and organic growth. With headquarters in Toronto, Canada, and offices in North America, Europe, Australia, South America and Africa, CSI has over 45,000 employees.