The Team.

We are a dedicated group of more than 60 video engineers, scientists, and problem-solvers that live and work all over the world. Every day we wake up to solve the biggest problems in video streaming and WebRTC.



  • Zheng Zhu

    CEO & Co-Founder
    Zheng is a video codec developer with multiple video technology exits, patents & publications.
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  • Zoe Liu

    CTO & Co-Founder
    Zoe is widely published and she has built video codecs & RTC solutions at Google, Apple, & Nokia.
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Global Business Leadership
  • Doug Castoldi

    SVP, Sales & Business Development

    Doug heads up our sales and business development efforts for the U.S. and EMEA regions.

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  • David Lea

    VP Sales & Video Solutions

    David leads our sales and video solution development team for key customers in the U.S. and EMEA...

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  • Meryl Gu

    Business Operations Program Manager

    Meryl handles many of our tasks, including finance, opperations, and logistics.

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Global R&D
learn how we improve UX & video quality.

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At Foothill Ventures, we believe in startup companies that ride the transformative power of major technology shifts such as deep learning in computer vision. Visionular’s founders are world-class technologists in their field of video codec and AI-driven optimization. We feel privileged to support their adventure with our resources and experience.

Dr. Xuhui Shao
Managing Partner, Foothill Ventures

Let's talk about how we can reduce your bandwidth cost & improve the quality of your service.