There are various levels of support for Sitecore, and each is available with perpetual or consumption-based licenses. Perpetual license support fees are paid annually as a percentage of total license price, and consumption license support fees are added to the monthly license fee.
What’s compatible with what?
As Sitecore innovates, it might be difficult to keep up-to-date on which module versions work with which platform versions. Our Knowledge Base features a handy table to make it all clear.