Optuna

Optuna is an open source, Python-based hyperparameter optimization framework designed to automate hyperparameter search for machine learning models. It offers state-of-the-art optimization algorithms, easy parallelization, and is framework-agnostic—supporting integration with PyTorch, TensorFlow, Keras, Scikit-Learn, XGBoost, LightGBM, and others. Optuna is aimed at data scientists, ML engineers, researchers, and developers looking for efficient, scalable, and extensible automated hyperparameter optimization tools.