As you mentioned correctly Apache Spark is offering MlLib (or ML) which it comes with a set of features for some basic NLP, most popular algorithms for clustering and classifications, etc.   But that is not all! You can use many libraries which are released to complete Spark in a domain of Machine Learning and Deep Learning. Basically, these libraries are using Spark APIs and Engine.   You can have a look here (or other lists): https://github.com/awesome-spark/awesome-spark#machine-learning-extension ... View more