Resumen: The move to new open access formats in scientific peer review is thought to have influenced the way referees and authors interact. This chapter considers the genre of author responses to referees in terms of relational work, and compares published responses in an anonymized online open access review system with a similar corpus of confidential responses to referees submitted by traditional means. In general, the online open access responses are longer, more syntactically complex and show more evidence of relational work than the confidential responses. However, when analyzed qualitatively, the proportions of different compliant and non-compliant moves are found to be similar in the two corpora. This chapter thus illustrates continuity and change in one genre¿s transition from traditional to open, online format.