Kai Spriestersbach

Kai is Head of AI at REACHX, a digital marketing agency based in Frankfurt, and a doctoral researcher at RPTU Kaiserslautern-Landau / DFKI, where he studies Generative Engine Optimization (GEO) under Prof. Dr. Sebastian Vollmer. His research focuses on how AI-driven search systems retrieve and surface information — and what that means for brands and publishers. With over 20 years of experience in digital marketing and SEO — including lead strategy roles for major German digital properties — he brings a rare combination of hands-on industry practice and academic rigor. His current work centers on the GIO (Generative Intent Operationalization) framework, a model for classifying how and when large language models need to ground their responses in external sources. Kai is the author of se...