R is an open source programming language and software environment for statistical computing and graphics that is supported by the R Foundation. Developed by Ross Ihaka and Robert Gentleman
License: Open Source
R is a powerful open-source programming language that excels in statistical analysis and visualization, while IBM SPSS Statistics offers a user-friendly interface and comprehensive built-in statistical procedures. R is preferred for its flexibility and extensibility, whereas SPSS is favored for ease of use, particularly among those who may not be familiar with programming.