  We present proppy, the first publicly available real-world, real-time
propaganda detection system for online news, which aims at raising awareness,
thus potentially limiting the impact of propaganda and helping fight
disinformation. The system constantly monitors a number of news sources,
deduplicates and clusters the news into events, and organizes the articles
about an event on the basis of the likelihood that they contain propagandistic
content. The system is trained on known propaganda sources using a variety of
stylistic features. The evaluation results on a standard dataset show
state-of-the-art results for propaganda detection.
