Rohan Gupta
Rohan Gupta is the co-founder and CEO of Diopter, which detects deepfake video, cloned voices and AI-driven social engineering on live calls. He previously founded QuillBot and led it through a $200M exit to Course Hero, now Learneo, in 2021. QuillBot today serves more than 35 million monthly users.
From building generative AI to defending against it
Rohan founded QuillBot in 2017 after posting an early version of the tool on Reddit. It became one of the most widely used AI writing platforms and was acquired by Course Hero, now Learneo, in August 2021.
He co-founded Diopter with Jeremy Pippin after seeing how quickly generative AI moved from productivity use cases to impersonation and fraud. Diopter scores live video and voice calls for synthetic media, and for the pattern attackers actually run: authority, urgency, isolation, escalation, and the ask.
Fraud is rarely detectable from a single frame or voice sample. It unfolds across a conversation, and the arc is the unit of analysis.
Track record
AI social-engineering and deepfake detection for live video and voice calls. Detection runs on the endpoint, so only verdicts and scores leave the device.
Built an AI writing platform that today serves more than 35 million monthly users. Raised a $4.25M seed from GSV Ventures and Sierra Ventures, and led the company through a $200M exit to Course Hero, now Learneo, in August 2021.
Recognition and press
Recognised for building QuillBot into a widely used AI writing platform.
On integrating every step of the writing process, and how AI can support language learners.
On the seed round, and on building a decision-making process rather than following best practices.
Articles reviewed
Diopter research checked for technical accuracy before publication.
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Upload a video or audio clip and get an instant AI verdict. No account required. See how Diopter detects synthetic media in seconds.
If you’re dealing with deepfake fraud, synthetic media threats, or need to understand what your organization is actually exposed to, we’d like to hear from you.