DO Venture Partners

DO Venture Partners is a women-founded early-stage venture capital firm based in San Francisco, founded in 2016 by Duygu Oktem Clark and Ed van Puffelen. The firm invests in mission-driven founders building early-stage tech startups in Silicon Valley by partnering with European VC funds. Founding Managing Partner Duygu Oktem Clark is a computer engineer with a master's in information systems and 15-plus years in technology as both an operator and investor. She previously led R&D teams at Turk Telekom Group overseeing 40-plus innovation projects with a combined $100 million-plus budget, founded Turkey's first startup accelerator, led eight investments at the European Investment Fund, and serves as a startup evaluator for the European Commission's Innovation Council. DO Venture Partners has deployed $4 million across 14 portfolio companies, writing checks of $50,000 to $100,000 and making six to ten investments per year. Focus sectors include AI, fintech, developer tools, remote working tools, sustainable technologies, and B2B SaaS. Portfolio companies include dahmakan (AI food delivery and logistics), CoScreen (acquired by Datadog), Legalpad (acquired), and SEED (acquired). Three exits via acquisition have been completed. Clark places team quality at the center of investment decisions — approximately 80% of her assessment — and backs founders who are singularly focused on solving well-defined problems. The firm's dual footing in Silicon Valley and European VC networks gives it a distinctive vantage point for bridging cross-Atlantic deal flow and co-investment relationships.