The European Union (EU) ‘agencification’ process is a story of success. European agencies are relied on in an ever-wider variety of sectors, ranging from the internal market to economic and social regulation. Over the past two decades, they have acquired increasing practical importance, both as an institutional phenomenon and as a method of policy delivery. Unsurprisingly, their functional and normative significance has become central in the institutional discourse and has caught the attention of European legal scholars.