CRS Arena is a platform to benchmark conversational recommender systems in a crowdsourced environment, developed by Nolwenn Bernard, Hideaki Joko, Faegheh Hasibi, and Krisztian Balog. This work has been presented at the 18th ACM International Conference on Web Search and Data Mining (WSDM ’25), in Hannover. Try it out here or have a look at the demo paper.