About us



An all communicating world, based on trust and security.


Clavister delivers business continuity through holistic cybersecurity solutions, based on Swedish innovation


Clavister is a leading European cybersecurity
vendor with over 20 years of experience.

Clavister is a leading European cybersecurity vendor with over 20 years of experience. Seated in Sweden, the company has customers—communication service providers, governments, enterprises and managed security service providers (MSSPs)—in more than 150 countries. Clavister provides unique security solutions to protect their digital assets and secure business continuity.
The company is, since 2014, listed on Nasdaq First North.


Martin Kreuzer

Martin Kreuzer was born in Bavaria and has a degree in law and administrative science from the German Federal University for Applied Administrative Sciences and Law. Martin has fifteen years of experience from intelligence work and information security matters, as Civil Servant at German intelligence services – amongst others in the field of counter-economic espionage and counter cyber warfare. Martin currently is Risk Manager for Cyber Risks in Cyber Insurance at Munich Re. Martin holds no shares in the company.

Through the proposed new director, the board of directors will gain relevant experience from information security work.

Board of Directors

Viktor Kovacs

Chairman of the Board, Member of the Audit Committee, Member of the Finance Committee, Member of the Remuneration Committee

Viktor Kovacs has significant global experience in go-to-market strategy and execution with growth-stage companies in the ICT sector …


Jan Frykhammar

Director of the Board, Chairman of the Audit Committee, Chairman of the Finance Committee

Jan Frykhammar has 26 years of work experience from various roles in Ericsson, being the Group CFO from 2009 and subsequently …


Kimberly Matenchuk

Director of the Board, Chairman of the Remuneration Committee

Kimberly Matenchuk is Managing Director at Ricardo Software. She has over 15 years’ experience in global and digital …


Staffan Dahlström

Director of the Board, Member of the Remuneration Committee

Staffan Dahlström is since 2009 the CEO of HMS Networks AB (listed on Nasdaq OMX Mid Cap) and one of its co-founders …


Martin Kreuzer

Director of the Board

Martin Kreuzer has fifteen years of experience from intelligence work and information security matters, as Civil Servant at German intelligence services…


PDMR Transcations / Insynshandel


Executive Management

John Vestberg

President and CEO

John co-founded Clavister in 1997 and was imperative in the process leading up the release of the company’s first commercial …


Jenny Ramkrans

Chief of Staff

Jenny Ramkrans has more than ten years of professional experience from small to large organizations within the public sector …


Przemek Sienkiewicz

Chief Strategy Officer

Seasoned manager with more than 20 years of operational, sales & marketing management and program management executive experience …


Andreas Åsander

Vice President of Sales

Vice President of Sales, joined Clavister in 1997 and held several positions within the company, including Product Marketing Manager …


Adrianne Edblad

Vice President of People and Culture

Adrianne has several years of experience working with HR in global companies within the information technology, service and …


Johan Edlund

Chief Marketing & Products Officer

Returned to Clavister in March 2018 as Chief Marketing & Products Officer after having roles as Commercial Manager Cloud …


Håkan Wallberg

Vice President of Operations

Håkan joined Clavister in January 2016. Before that more than 20 years of experience in the IT sector, including project management …


Nils Undén

Vice President of Engineering

Since 1993 when he began taking on engineering management roles, Undén’s career has been defined by helping tech companies navigate …

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Quality Policy

For us quality is not a destination in itself, it is a journey. We have a constant focus on our market and what our customers need.

This is how we are able to offer flexible products and service that meet both present and future customer demands. Giving customers products and services that they want and rely on for their daily business is a prerequisite for our business success.

It is therefore crucial that every Clavister employee takes an active part in the continuous improvement of our products, services and operations.

In 2007 we decided to get official recognition for our work and certify the company in accordance with the ISO 9001 quality standard. In early 2008 we received our ISO 9001 certification as an approval of our dedication to quality and process improvements.

Our History

Scandinavia and Sweden have—over the course of the last ten years—become one of the hottest and most successful tech corridors in the world. In 2015, Sweden became the second most prolific tech hub in the world on a per capita basis, producing USD6.3bn in value per million people, compared to Silicon Valley’s USD8.1bn, according to a recent report from the investment firm Atomico. It’s a salute to Sweden’s innovation and tech savvy.

Clavister, a Latin word meaning ‘Key holder’ came together by a union of chance in an unlikely Swedish place. Örnsköldsvik, located between Stockholm and the Arctic Circle, is blessed with natural beauty. But more importantly, it’s powered by an excellent university in Umeå that feeds its knowledge waters as well as an entrepreneurial spirit born of creating value and wealth from modest means.

The Clavister story begins with entrepreneur Peter Johansson, who had founded an early Internet company, EnterNet Sweden HB in 1995. As it grew, the need for more equipment—namely a secure router—became mission critical. Johansson had joined forces with another software entrepreneur, John Vestberg, who, together with talented software engineer Mikael Olsson, quickly set about solving the problem. Together, they’d create a secure and fast router, something that took larger companies teams of staff and budget to achieve. In fact, they were developing an actual product that could be offered to the market, a device and code that could take on the security aspects of an always on Internet connection. It was an idea that could be sold to the world. Clavister AB was born in 2001 as EnterNet AB became the new company, founded by Johansson and co-founded by Vestberg, ready to see how far their ambitions could go.

By 2002–2003 they launched their first physical appliance, a highly regarded firewall device that performed well in test after test. By 2008 the first virtual gateway was released, another critical technological milestone. Clavister’s reputation grew and European markets started to hunger for their products and services. Soon Asian offices were added. The development of their own, proprietary software – first cOS core and later its cOS stream solution—made the product into an award winning and industry respected leader in cybersecurity and digital threat deterrence. Investment and growth have helped put Clavister create an installed base of 20,000 customers with a 95% satisfaction rate and propelled it to be one of the few Swedish technology companies to be listed on the NASDAQ OMX Nordic exchange. It’s also achieved a formidable client list that includes Nokia, Canon, D-Link as well as collaborations with Intel, Redhat, VMware and others. It’s an almost 20 year history that has led Clavister to its present market position, a leader in virtual security with an eye to the future.

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