Dafina Toncheva
Partner, US Venture Partners

Dafina Toncheva invests in emerging technologies in the enterprise space with a focus on Enterprise SaaS applications and security. Dafina joined US Venture Partners (USVP) in 2012 and has since led investments in and joined the board of several early-stage software companies. She is currently on the board of InsideSales.com - the leading sales acceleration platform, Prevoty - leader in application security, and Apptimize - provider of one of the fastest-growing mobile monetization and engagement platforms.

Dafina joined USVP in 2012 from Tugboat Ventures, where she had been a principal investor since 2010. Prior to Tugboat, she spent two years at Venrock, where she helped expand the firm's investments in the areas of SaaS, virtualization, security, infrastructure, and enterprise applications. Dafina led the first institutional investment round in Cloudflare - a startup of two founders and an idea that has since transformed into one of the most successful internet security startups in Silicon Valley. Her other investments from that time include Aria Systems, a widely used SaaS billing engine; and Matrixx Software, an innovative charging system for telecommunication service providers.

Before becoming an investor, Dafina held positions in development and product management at Microsoft, where she focused on authentication systems, digital signatures, and business workflow. She worked on MSN Live ID and MS Office, and co-authored several key patents.

Dafina holds an MBA from Stanford Graduate School of Business and a BS in Computer Science, magna cum laude, with a special focus on cryptography, efficient algorithms, and database systems from Harvard University. 

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