Personalization Engines deliver dynamic, real-time personalized experiences on web and app surfaces — showing different content, products, recommendations, and CTAs to different visitors based on behavior, attributes, and lifecycle stage. The category targets Marketing/Web/Growth teams optimizing on-site conversion, distinct from Customer Journey Orchestration tools that orchestrate cross-channel multi-step journeys. Core capabilities include real-time visitor profiling, dynamic content delivery on web and app surfaces, AI-driven recommendation engines, A/B-test integration for personalization variants, and integration with CDP/MAP/CEP. The market spans web personalization engines (Dynamic Yield, Bloomreach, Optimizely Personalization, Adobe Target), B2B web-personalization specialists (Mutiny), and eCommerce-recommendation specialists (Algonomy, Monetate, Qubit, Fanplayr).