Comodo Internet Security (CIS) and Comodo firewall are free.
However, there is also a paid “package” that includes CIS, but also adds supplementary services such as unlimited product support, online storage, and a $500 virus free guarantee.
The free version of CIS and the version of CIS included in the paid package both have the same features, functionality, and protection (in other words, all features in CIS are accessible and fully functional in the free version).
The outdated website does not make this distinction very clear.
The free version is called Comodo Internet security Premium.
The paid package is called Comodo Internet security Pro (previously called CIS complete).
You can download the latest version of free CIS (Premium) and the latest paid package (Pro) from the first post in this this thread:
New Version 12.3.3.8152 Available for Comodo Internet Security 2025