This website’s domain name comes from my legal first name, Sytse, but please call me Sid.
I love to build companies and philanthropies that have the potential to improve the world around us. I believe in raising the aspirations of ambitious people.
My wife and partner Karen Sijbrandij and I are both originally from the Netherlands.
Here you’ll find more information about GitLab, as well as our projects, philanthropic ventures, my cancer journey, and new ideas I’m excited about.
Quick Links
Co-founder and Executive Chair. From an open-source project to a public company.
Taking agency in the treatment of my osteosarcoma, and scaling the approach for others.
Two foundations, Open Core Ventures, Art City, and the Charter Cities Institute.
Featured articles, interviews, and podcasts.
Newsletter
Stay in touch.
Occasional notes on GitLab, open core, my cancer journey, and new ideas. Via Substack.