That's the view of legendary Brazilian goalkeeper Dida, who played with the shot-stopper at Brazilian side Internacional.
Liverpool spent £ 66.8million on Alisson during the summer to make him the world's most expensive goalkeeper.
It was a record that lasted a matter of weeks as Chelsea paid Athletic Bilbao £ 71.6m for Kepa Arrizabalaga.
Alisson came in after Loris Karius struggled at Anfield, making two huge errors as Liverpool lost the Champions League final to Real Madrid.
The Brazilian has impressed during his early career on Merseyside, despite one mistake leading to a goal against Leicester.
Liverpool are unbeaten in the Premier League with the 26-year-old between the posts with the side having conceded just five league goals.
And Dida, who won two Champions League titles during his time with AC Milan, has praised his compatriot.
"I like Alisson very much – I think he is a great goalkeeper," the 2002 World Cup winner told Omnisport.
"I had the opportunity of working with him at Internacional.
"I see his great development in football; going to Europe, playing for the Brazilian national team.
"I hope he can be what everyone expects of him, conquering many things here in Europe and establishing himself as one of the best goalkeepers in the world."
Alisson knows he is under pressure at Anfield.
The Reds are in the hunt for their first ever Premier League title.
Liverpool have been tipped as Manchester City's closest challengers and have already held the reigning champions to a 0-0 draw this season.
But the former Roma keeper is still working to improve.
"I came here for a high price and some people expect me to be perfect – it is not easy but I'm trying," Alisson said.
"It is really early to say if I'm satisfied with how I'm playing but I'm working to be perfect, I'm working to be better."