Investment Stage

Focus Areas

About Investor

Rokas Tamosiunas is a Partner at Open Circle Capital with a strong focus on emerging technologies and security-driven innovation. He invests in DefenseTech, AI, Cybersecurity, and DeepTech startups at the Pre-Seed and Seed stages. Rokas generally participates in funding rounds ranging from $50K to $500K, with a typical check size of approximately $100K. He looks for founders developing technologies that solve critical security, defense, and infrastructure challenges. His investment approach emphasizes strong technical teams and scalable products with international market potential. Entrepreneurs building mission-critical technologies may find him a highly relevant investor.