Best Open-Source Machine Learning Libraries in 2025

PyTorch has become the first-line choice for developers and researchers in the field of machine learning because it is easy to use and possesses a dynamic computational graph. PyTorch is maintained by Facebook AI Research and is best known for its very high flexibility in working in the field of deep learning research. PyTorch is still among the leading open-source machine learning frameworks in 2025 because of its easy-to-use syntax, because of which developers are able to toy around with neural networks easily.
PyTorch is extremely versatile in terms of use, varying from computer vision, natural language processing, to generative models. PyTorch seamlessly integrates with the rest of the Python ecosystem so model training and deployment is feasible with ease. As it grows its community and continues to gain abilities, PyTorch is among the top choices for researchers and developers.