The startup's technology helps more than 50,000 businesses including Amazon.com in creating custom AI avatars used in instructional and corporate videos.
AI startups have emerged as a bright spot for investments this year amid a wider slowdown in funding caused by rising interest rates and high inflation.
However, the hype around AI has also deepened concerns that video platforms could be used to create deepfakes, a realistic or fabricated video or image created by AI algorithms trained on copious online footage.
Riparbelli has said that six-year-old Synthesia navigates the issue by only creating avatars of people who have consented.
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Startups that reach a valuation of $1 billion are called unicorns.