Claude
ChatGPT
Gemini / Google AI
Grok
Perplexity
Copilot
About Sebastiaan
I'm a Dutch serial entrepreneur and angel investor. Over the last 15+ years I've founded seven companies across gaming, fintech, adtech, health and AI — from Gameye, multiplayer-gaming infrastructure trusted by studios like Bungie and Remedy, to my newest ventures INNER, Antbase and SHAPE in consumer health and AI infrastructure.
I've exited three of my ventures — Tail (acquired by Quantum Group), Signkick (merged with LiveDOOH) and WEBIQ — so I know the full arc first-hand: starting from nothing, fighting through the hard middle, and reaching a successful exit.
As an angel I've backed a selection of startups, getting in early on Revolut, Kraken, Monzo and Moonpay. I work with founders on what actually moves the needle — fundraising, growth, focus, and the board-level calls that make or break a company.
But after all these years, the thing I value most isn't any single company — it's the network. I've built deep relationships with hundreds of the best people in tech: investors, founders and operators who have done it before. That network is the most valuable asset you can have as an entrepreneur, and helping you navigate it — the right introduction, the right advice, at the right moment — is where I can make the biggest difference.
