You can access both Marcellus and Marcellus SC for free. These links provide options to download the files or copy the embed code for web projects.
For LaTeX users, the Marcellus package provides support for pdfLaTeX, XeLaTeX, and LuaLaTeX. Key Characteristics of Marcellus Marcellus - Google Fonts wtqc font link
If you have a Creative Cloud subscription, you can activate similar styles like Freight Neo Pro or Cora Regular . You can access both Marcellus and Marcellus SC for free
If you are looking to download or implement this typeface, the most reliable are found through official font repositories: wtqc font link