Saarth Shah

I’m the co-founder and CEO of Sixtyfour (YC X25), where we’re building AI agents to help GTM teams sell better and faster to SMBs.

I graduated from UC Berkeley with a degree in Data Science after transferring from UCSD’s Halıcıoğlu Data Science Institute. I’ve been building things since I was 10, and one of my favorite early projects was a multiplayer Call of Duty clone I built in high school.

During college, I worked on a lot of cool stuff. At Stanford’s Snyder Lab, I helped researchers make sense of wearable health data. At the San Diego Supercomputer Center, I built models to analyze 911 call logs and social media, helping predict major school events like shootings.

I also launched Socale, a college social network at UCSD that took off—1,000 users, 30,000 sessions, and 13,000 messages in just two quarters. We ultimately shut it down because retention in consumer social is hard.

In summer 2023, I joined Deepgram (YC W16), where I built full-stack tools to scale enterprise partnerships and AI-powered onboarding. After that, my friend Eric and I built a Shopify chatbot at Internalize that combined LLMs with recommendation engines—we sold the company in fall 2023.

In 2024, I also started Dart, where we built one of the first fully conversational voice AI agents capable of automating customer support with near-human accuracy.

In summer 2024, I worked at Whatnot (YC W20), where I built their search spelling correction system, improving how buyers and sellers find products. I also returned full-time in 2025 for about two months and then left after getting into YCombinator.

Now at Sixtyfour, we’re all-in on AI for sales—helping teams reach more prospects, close deals faster, and stand out from the competition.