Gabriel Fuller

Gabriel Fuller is the founder of Reaction21, a boutique technology consultancy specializing in custom application development, Umbraco CMS, and AI automation. With over 23 years in technology, he's shipped projects across more than a dozen industries — and has a particular interest in the gap between what AI tools are actually good at and what vendors claim they can do. He builds practical systems, writes honestly about what works, and runs a deliberately lean operation where the work speaks for itself.