If there is one company being really strong in Machine Learning, it is Google. TensorFlow is a framework developed by Google for data-driven programming and contains numerous algorithms that are used in machine learning. The math library was originally developed by the Google brain team for internal use. At the end of 2015 the TensorFlow library was released as open source.
TensorFlow is not only used by us. At Google it is used both for research and production. Or the other way round. ;-)