With Domain Mapping System, you can have multiple domains pointed to your single (non-multisite) WordPress instance.
Then, you can choose how to map those domains to specific pages/posts or groups of pages/posts.
While we are working on many other features that make Domain Mapping System a multisite alternative, there are some key differences now.
For instance, multisite divides up your WordPress installation into sub-sites that can only be accessed by certain users. Those sites can be assigned domains as well, but they are really like wholly different sites that can have plugins and themes independently activated on them.
Domain Mapping System may allow similar features in the future, but there are capabilities we won’t implement simply because of the nature of multisite. You can check our Roadmap on our website https://domainmappingsystem.com/roadmap/ and also make feature requests there.
Please let me know if I can clarify the differences any further or answer or other questions.