What we do.

Early Stage Investment

SIVEST primarily invests in early stage startups (MVP, early market). In addition to the capital, startups receive a strategic partnership as well as access to our powerful network of experts and mentors.

Marketing Consulting

With a strong focus on national & international launch strategies, digital transformation as well as the optimization & scaling of business models, we help companies achieve their goals.

Strategic Partnerships

We help you launch, optimize and scale your business or brand. With our network of marketing specialists, investors, mentors and media & trade experts, we accompany you to achieve your goals and beyond.

Who we are.

Markus Siuda

CEO & Founder

Martin Siuda


Markus & Martin Siuda grew up as the sons of an advertiser and started with online marketing at the age of 15 and 17. At that time, they founded an association to promote young artists and organize events. Through online marketing, they quickly filled halls and established video marketing as a state-of-the-art advertising tool for local events in Austria. These successes quickly led to them offering their services to clients as well, implementing successful campaigns. 

Before founding CORVIS in its current form, their careers took them from startups to advertising agencies to corporate enterprises. With the founding of Corvis, they specialized in brand building and online marketing from the very beginning.For the past few years, an ever-increasing specialization in performance marketing has been growing, in which the company sets up successful campaigns for clients as an official partner of the largest social media channels such as Facebook, Pinterest, TikTok and Snapchat. 

Today, the agency works with many other agencies, direct clients and investors who trust in the performance of CORVIS. In addition to managing their agency, Markus and Martin are also board members in various associations (Vice-President & President IAA Young Professionals, Advisory Board Member Viva Con Agua, Forbes Agency Council).

Our Clients.

Get in touch.

SIVEST GmbH | Köstlergasse 1/39, 1060 Vienna, Austria
UID: ATU77386605, FN 565032 f, HG Wien • GF: Martin Siuda, Markus Siuda • AGBs

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