Abstract This article presents the results of the Latin American Observatory of eVAluation Indicators (OLIVA, its Spanish acronym) which aims to contribute to the visibility of indexed scientific output in Latin America and the Caribbean and enhance its value in evaluation systems. This study addresses the production published in open access by journals indexed in SciELO and Redalyc, based on a single database of a total of 1,720 journals (from 15 countries), 908,982 documents and 2,591,704 authors. It also highlights its disciplinary diversity, and trends in national and international research collaboration. Finally, only for the case of Brazil and SciELO, intranational collaboration is analyzed. The study concludes that there is a predominance of diamond journals, of university publishing institutions and of multiscalar forms of circulation. These characteristics, even with linguistic and disciplinary diversity, can contribute very effectively to the current needs of science communication in times of open science.