Sebastian Blum

Sebastian is Founding Partner at Greenfield. Before founding Greenfield, he was VP Business Development at Dedrone, an airspace security company, and VP Business Development at Cooliris, an early photo-sharing app, which was acquired by Yahoo! in 2014.

Sebastian looks back on 15 years of experience in venture capital, including his roles as Managing Director US for T-Venture, Deutsche Telekom’s $1bn corporate Venture arm, and Partner for Active Venture Partners.

Sebastian holds an MBA from NIMBAS, Bradford Graduate School of Management.

Publications from Sebastian

  • _Research
    Tags: Published On: April 10th, 2026

    This piece argues that Europe's digital sovereignty debate is asking the wrong question. The focus on who owns the infrastructure – American or European companies – misses the more fundamental issue of how it's built. Replacing AWS with a European cloud provider changes the flag on the data center; it doesn't remove the single point of failure. Blockchain networks, by contrast, deliver the resilience properties Europe's own regulatory frameworks demand, no central operator, no kill switch, no single jurisdiction, and have been proving it in production for over a decade. The infrastructure exists. The question is whether Europe will recognize it as part of the answer.

  • _Investments
    Tags: Published On: July 19th, 2021

    We are very excited to announce that we have backed Nym Technologies as part of their $6m round together with our co-investors Polychain (lead), Eden Block, Tioga Capital, 1kx and Maven 11. At Greenfield, we are backing developer teams building towards an open, decentralized, and more robust architecture of tomorrow’s internet.