Dafina Toncheva is a General Partner at USVP where she invests in emerging technologies in the enterprise space with focus on Enterprise SaaS applications and cybersecurity. Toncheva has led investments in and joined the boards of XANT (formerly InsideSales.com), Luma Health, Arkose Labs, Raken, Percepto and Prevoty. Prior to joining USVP, Toncheva was a Principal Investor with Tugboat Ventures and Venrock. She led investments in Cloudflare (NYSE: NET), Aria Systems, Kenna Security and Matrixx Software. Before becoming an investor, Toncheva held positions in development and product management at Microsoft focusing on authentication systems, digital signatures and business workflow. Toncheva holds an MBA from Stanford GSB and a BS in computer science from Harvard University.