Professional Overview
Eunjoon (EJ) Cho is the Co-Founder and CEO of Tofu, a generative AI platform headquartered in San Mateo, CA, that specializes in creating hyper-personalized, omnichannel B2B marketing campaigns at scale. Under his leadership, Tofu has rapidly emerged as an innovative enterprise marketing solution integrating AI-driven automation to empower marketing teams.
EJ Cho's career is deeply rooted in artificial intelligence and machine learning, with a robust background that spans leadership roles in leading technology companies prior to Tofu’s founding. He has extensive experience in AI, having started his career at Google immediately after graduate school, where he contributed to training language models. Subsequently, he has held engineering management positions at major enterprises including Facebook (Meta), Fast, and Affirm, reflecting a strong technical foundation combined with leadership capabilities.
Educational Background
- Ph.D. in Electrical Engineering from Stanford University (2009–2013), specializing in speech recognition, speech enhancement, and noise reduction.
- Additional advanced degrees from Stanford, indicating a substantial academic foundation in AI and related technologies.
Company & Fundraising Milestones
- Tofu was founded in early 2023 by Eunjoon Cho along with co-founders Elaine Zelby and Honglei Liu, all of whom bring combined expertise in AI, marketing, and machine learning.
- In October 2023, Tofu closed a $5 million seed funding round led by Index Ventures with participation from strategic investors including SignalFire, Stage 2 Capital, and Liquid 2 Ventures.
- In February 2025, the company successfully raised an additional $12 million in a Series A funding round, backed by 13 investors including Ironwood Ventures and HubSpot Ventures, signaling strong investor confidence and a growing market footprint.
Business and Product Focus
Tofu’s platform automates top-of-funnel marketing by generating content optimized for omnichannel outreach tailored to B2B marketing teams. The solution focuses on:
- Hyper-personalization of marketing campaigns at scale through generative AI capabilities.
- Providing derivative content generation ("Campaigns In-a-Box") for specific events such as webinars.
- Integration of connected data sources to enhance AI-driven insights.
- Recent product innovations include features like Tofu Pages and seamless integration with external tools (e.g., Perplexity) to enhance marketing automation.
Eunjoon Cho has emphasized Tofu’s mission to unify AI marketing platforms for go-to-market (GTM) teams, continuously expanding functionality and refining product design based on customer feedback. He advocates for smart and thoughtful utilization of AI in marketing, challenging common industry stigmas.
Leadership and Hiring Initiatives
- EJ Cho actively drives talent acquisition, with repeated public postings indicating ongoing recruiting efforts for product and engineering roles aimed at scaling Tofu’s capabilities.
- His leadership style portrays a focus on startup agility, innovation, and building impactful AI-powered marketing technology solutions.
Industry Recognition and Public Presence
- EJ Cho and the Tofu leadership team have received notable press coverage in TechCrunch, BusinessWire, and AI/marketing-centric investment blogs.
- EJ Cho has been featured in podcasts and video interviews (e.g., Accelerating AI, YouTube marketing-focused sessions), where he discusses the inspiration behind Tofu and the role of generative AI in transforming B2B marketing.
- He is active on LinkedIn, sharing insights about AI in marketing, announcing company milestones, and promoting a culture of innovation.
This profile underscores EJ Cho’s combined expertise in AI research, engineering leadership, and entrepreneurial vision focused on leveraging generative AI to revolutionize enterprise B2B marketing. The substantial venture backing and continual feature expansion of Tofu indicate a high-growth early-stage company positioning itself at the intersection of AI and marketing automation under his stewardship.
