Eric Siu is CEO and Founder of Single Grain, the Los Angeles digital marketing agency he purchased for $2 in 2014 when it was a struggling SEO shop and rebuilt into an AI-native full-service firm. He also hosts the Leveling Up podcast and co-hosts Marketing School with Neil Patel, and he has turned that teaching habit into books, courses, and a wider media brand around growth execution.
Buying Single Grain for Two Dollars
Single Grain's About page states that Siu purchased the then-struggling SEO agency for $2.00 in 2014 and rebuilt it. Before that purchase he had led user growth and marketing at the online education company Treehouse when it needed a turnaround, and he studied economics and history at UC San Diego before later completing MIT's Entrepreneurial Master's Program.
Single Grain has since worked with brands such as Amazon, Uber, Salesforce, Airbnb, Nextiva, and Lever.
Marketing School and Leveling Up
Siu co-hosts the daily Marketing School podcast with Neil Patel and hosts Leveling Up, where he interviews operators on hiring, sales, marketing, and personal growth. His Leveling Up about page describes an earlier path through competitive gaming and poker before marketing, and frames the show as a way to pull actionable growth levers from founders who have scaled.
He has also built adjacent products and education around the same brand, including Single Brain as a managed company-brain and revenue-agent layer in later public materials.
Single Grain as an AI-Native Agency
Single Grain now markets itself as an AI-native marketing agency rather than only a classic SEO shop. Siu's public framing emphasizes scalable growth without simply adding headcount.
The About roster lists a leadership team around him for technology, operations, client operations, and sales, including Carissa Cope as VP of Client Operations.