Tubebuddy is free-to-use software with limited features but you can use the advanced options too via becoming their paid user. There are 3 Paid plans (Pro, Star, Legend) and 2 Payment Options. The monthly Billing is: Pro -$3, Star-$11.5, Legend-$26.5 | The Annual Billing is: Pro-$28.8, Star-$110.4, Legend-$254.4.