EventoChain is a B2B platform designed to help event organizers and sponsors manage sponsorship activities and measure post-event outcomes more effectively. The platform connects events, sponsors, and digital follow-up actions by providing tools to structure sponsorship packages, distribute campaign content, and track user engagement after events. Rather than focusing solely on on-site exposure, EventoChain enables organizers to capture and organize post-event actions such as registrations, content access, claims, or other defined interactions. EventoChain supports both online and offline events and is commonly used in technology, Web3, and startup ecosystems where sponsors seek clearer visibility into engagement beyond impressions. Data is collected based on defined actions and participation flows, allowing organizers and sponsors to review engagement results in a centralized dashboard. The platform is used by event organizers to manage sponsor relationships and by sponsors to monitor post-event engagement in a structured and auditable way.