<p>In recent years, more and more studies have been published dealing with institutionalized participatory and deliberative democracy. These works have investigated both theoretical aspects and empirical institutionalization experiences. The number of articles focusing on the institutionalization of participatory and deliberative tools has become so high that a systematic literature review is necessary. Today, such a review does not exist. In this paper, we want to fill up this gap in order to identify inconsistencies and consequent research avenues. Our literature review, covering the period 2010–2023 and relying on two of the most significant scientific databases (Scopus and Web of Science), follows a two-step approach. First, we implement a systematic literature review on the general topic of the institutionalization of participatory and deliberative tools, allowing us to obtain a broad overview of what scholars have said so far. Then, we scrutinize theoretical and empirical studies on institutionalization to uncover trends in this stream. By combining these two approaches, we can make a contribution to existing knowledge, summarizing more than ten years of academic thought on the topic. Several themes emerged from this investigation that merit further analysis, especially the bias towards the so-called Western countries at the expense of other countries and the lack of consistent international collaborations.</p>