The FAQ says
Are there educational or non-profit discounts?
Yes! If you are legally recognized as an educational institution we offer an 85% discount. If you are legally recognized as a non-profit organization that is exempt from federal taxes, we offer a 50% discount. These discounts apply only to our standard and business plans, and must be paid through a debit/credit card monthly or annually. Please contact us after starting your trial and we’ll add the discount to your account.