The data presented in the accompanying files were collected through the Voting Advice Application (VAA) What2vote (www. what2vote.gr), which was designed for the May and June 2023 parliamentary elections in Greece. VAAs are contemporary technological solutions that aim to assist voters in making informed decisions on their vote choice. They do so primarily by comparing the positions of voters to the positions of candidates or political parties on a set of relevant policy issues and informing voters about which is the closest party or candidate to their preferences. This dataset contains user responses of the online survey and the associated positions of political parties.