Download | Wolfram V9.8.1 Mc1.8

Why is Wolfram Language free to use, but Mathematica is not?

While specific changelogs for v9.8.1 are rare due to its age, the Wolfram client is known for these core features: Download Wolfram v9.8.1 MC1.8

Downloading from unofficial sources can expose your computer to viruses or data theft. Why is Wolfram Language free to use, but Mathematica is not