Hi there thanks for posting in the Community! Yes if you share your document with a free level user they will be able to open it. However if you have advanced shapes on the canvas or you are using basic-level features that free-level users do not have access to they will face restrictions in their ability to edit the document. If you would like users to be able to edit the document containing paid features they will need to either upgrade or begin a free 7-day trial.

Be sure to check out our Account Types article from our Help Center for more information. Hope this helps! Happy Diagramming!