
If you require multiple licenses for a classroom setting, please apply for free Educational (Classroom) licenses at. To learn more about individual licenses and renewals for teachers and students, and for more information and conditions on the Graduation discount, please see. The Graduation discount is effective for 2 years from your Student License expiration date. In addition to this, JetBrains is happy to compliment you on your graduation by providing you with a 40% Graduation discount, which can be used toward the purchase of a personal license subscription (annual or monthly) for any single JetBrains product or the All Products pack. Educational licenses cannot be used for commercial purposes. I can't see how you can be 'quite sure' of that.

Students and teachers are eligible to use the JetBrains All Products Pack (which includes IntelliJ IDEA Ultimate, ReSharper Ultimate, as well as our other IDEs and tools) free of charge for educational purposes. IntelliJ Open Source is released under the Apache 2.0 License (see /display/IJOS/License+Information), and if that is not enough, again, the linked FAQ from 2 years ago clearly states that anyone can build commercial or open source products on top of it.
