You're right about Caffe2 [1], but Torch and PyTorch have existed for a long time and don't seem infected [2] and [3]. For completeness, both TensorFlow [4] and

You're right about Caffe2 [1], but Torch and PyTorch have existed for a long time and don't seem infected [2] and [3]. For completeness, both TensorFlow [4] and MXNET [5] are Apache 2. [1] https://github.com/caffe2/caffe2/blob/master/PATENTS https://github.com/caffe2/caffe2/blob/master/PATENTS [2] https://github.com/torch/torch7/blob/master/COPYRIGHT.txt https://github.com/torch/torch7/blob/master/COPYRIGHT.txt [3] https://github.com/pytorch/pytorch/blob/master/LICENSE https://github.com/pytorch/pytorch/blob/master/LICENSE [4] https://github.com/tensorflow/tensorflow/blob/master/LICENSE https://github.com/tensorflow/tensorflow/blob/master/LICENSE [5] https://github.com/dmlc/mxnet/blob/master/LICENSE https://github.com/dmlc/mxnet/blob/master/LICENSE