optuna and orion
Optuna is a mature, general-purpose hyperparameter optimization framework that serves as a direct competitor to Orion, though Orion specializes in asynchronous distributed optimization with a focus on MongoDB-backed trial storage and experiment tracking, making it a niche alternative rather than a complement.
About optuna
optuna/optuna
A hyperparameter optimization framework
Supports dynamic, conditionally-constructed search spaces through a define-by-run imperative API that allows hyperparameter dependencies. Leverages state-of-the-art sampling algorithms (TPE, GP-based, multi-objective optimization) with built-in early stopping via trial pruning. Integrates with PyTorch, TensorFlow/Keras, LightGBM, XGBoost, and distributed frameworks like Dask for scaling across multiple workers.
About orion
Epistimio/orion
Asynchronous Distributed Hyperparameter Optimization.
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