The SF Voice Agent Hackathon held on September 19, 2025, in San Francisco brought together developers, entrepreneurs, and AI enthusiasts to create innovative voice agents using cutting-edge technologies from AssemblyAI, LiveKit, Rime, and Accel. This one-day event challenged teams to build conversational AI applications, with a $1,500 grand prize and $300 for category winners, showcasing how voice agents are evolving from experimental tech to practical solutions. Participants developed a wide range of projects, including Voxy, a zero-code platform that simplifies voice agent development for businesses, and Podweaver, which impressed with its sophisticated podcast ad replacement system. The hackathon highlighted the versatility of voice agents and the potential they hold for addressing real-world problems, such as civic engagement and productivity challenges. The event not only celebrated technical achievements but also fostered connections among participants, underscoring the rapid prototyping possibilities when equipped with advanced AI tools and a supportive community.