Pastore has been linked with Inter ahead of the Coppa Italia final.
"He's a talent, is doing very well in Palermo, is one of those players who can come up with something at any time to change the game," said Zanetti.
"Javier is very good, calm, the important thing is that when you do well on the field you certainly will do well for Palermo and the national team.
"A comparison? He looks a bit like Kaka, but being so young he can still grow a lot."