PyOD (Python Outlier Detection)
PyOD is a comprehensive and scalable Python library for detecting outliers/anomalies in multivariate data. It includes more than 40 detection algorithms including deep learning approaches (AutoEncoder, VAE), proximity-based methods (LOF, CBLOF), linear models (PCA, OCSVM), and ensemble methods (IForest, LOCI). Widely used in research and production for fraud detection, intrusion detection, medical anomaly detection, and data quality monitoring.