Hi Ariel

Thanks for your post! On the free EDU upgrade you have access to unlimited sharing. This means you can share your document and collaborate with anyone who has a Lucidchart account. The thing to keep in mind is anyone you share the document with will be able to collaborate to the extent their account level/subscription allows.

To learn more about the features and functionality available to free EDU accounts check out this page. And to compare a standard free account with paid account levels review our Lucidchart Plans article from the help center.

Feel free to let me know if you have anymore questions and I'm happy to help!