According to the page it supports note linking. Isn't obsidian also free as long as you are not using the sync service?

At the moment I am using Anytype, but am looking into obsidian. Lately anytypes development feels kind of strange. They are more an more moving from a note app to a collaboration app. And I wonder how long the note taking will be unaffected by it. So obisidian is becoming more and more interesting, because of the independent markdown format...