Is PRTG still free?

Excuse me, could you please clarify something for me? I've heard about PRTG and I'm wondering, is it still offered as a free service? I understand that it's a popular tool for network monitoring, but I'm a bit confused about its pricing model. Could you provide some insight into whether or not PRTG remains free, or if there are any costs associated with using it? Thank you for your time.