No, not by default. In fact, the default installation of plexe doesn't include deep learning libraries.
Plexe _can_ build deep learning models using `torch` and `transformers`, and often the experimentation process will include some NN-based solutions as well, but that's just one of the ML frameworks available to the agent. It can also build models using xgboost, scikit-learn, and several others.
You can also explicitly tell Plexe not to use neural nets, if that's a requirement.