No, one of the main principles of ntop is that even if we need support for continuing our developments, we have never charged universities, education, no-profit (in this category fall NGOs, social associations for public good such as ONLUS and 501(C), hospitals, and charitable associations; other organisations such as municipalities, government departments or organisations that do not offer a public service DO NOT qualify) and scientific research organisations.
So if you qualify, we can offer our software products for free, and ask our partners who manufacture hardware-based products to provide you a discount. In the latter case please mail us, and explain why you qualify for free licenses.