What are some alternatives?
When comparing KNIME Analytics Platform and RapidMiner, you can also consider the following products
RStudio - RStudio™ is a new integrated development environment (IDE) for R.
Scikit-learn - scikit-learn (formerly scikits.learn) is an open source machine learning library for the Python programming language.
IBM SPSS Statistics - IBM SPSS Statistics is software that provides detailed analysis of statistical data. The company behind the product practically needs no introduction, as it's been a staple of the technology industry for over 100 years.
Pandas - Pandas is an open source library providing high-performance, easy-to-use data structures and data analysis tools for the Python.
MATLAB - A high-level language and interactive environment for numerical computation, visualization, and programming
NumPy - NumPy is the fundamental package for scientific computing with Python