Tableau Desktop is free for students, teaching staff and researchers doing non-commercial research.
Students can use Tableau on their own devices by requesting a free license through Tableau Academic Program for Students
Teaching staff can request an individual license for use on their own devices or request a bulk free license for their teaching class or computer lab using Tableau for Teaching. Researchers can request an individual license for use on their own devices for non-commercial research use. The free license needs to be applied and renewed annually.
Tableau Public is the free version of Tableau Desktop that allows users to publish interactive data visualization to the web. Once a visualization is published on Tableau Public Server, it is open to everyone. Tableau Public also has some limitations in data source connection and storage.