Explore the journey of WhatsApp's co-founder Jan Koum in this 51-minute Stanford CS183F: Startup School lecture. Gain insights into building a global messaging solution, internal team psychology, fundraising experiences, and early user acquisition strategies. Learn about the decision-making process behind WhatsApp's development, security considerations, and how the platform differentiated itself from competitors like Messenger. Discover valuable lessons on scouting talent, hiring early employees, and scaling a product to serve billions of users worldwide.