Crush graham crackers into fine crumbs using a food processor or rolling pin.
Mix crumbs with melted butter and sugar until texture resembles wet sand.
Press firmly into the bottom of a 9-inch springform pan. Chill for at least 20 minutes.
Beat softened cream cheese and sugar together until smooth with no lumps.
Add mango puree, lemon juice, and vanilla extract; mix until fully combined.
In a separate bowl, whip cold heavy cream until stiff peaks form.
Gently fold the whipped cream into the mango cream cheese mixture in 2–3 additions.
Pour the filling over the chilled crust and smooth the top.
Cover and refrigerate for at least 6 hours, or overnight for best results.
Before serving, top with fresh diced mango and an optional mango glaze.
Slice with a clean, sharp knife, wiping the blade between cuts