Question: what are all the sage modes in naruto?
Answer: The series never states how many “Sage Modes” there are, from all we know, there are 3 types of Sage mode.
Frog Sage mode were we see Naruto, Jiraiya, and Minato use, which can be learned from Mount Myoboku.
We also have Snake Sage mode which is used by Kabuto and Mitsuki, learned from the Ryuchi Cave.