GSRE India: GRSE built the Aditya class tanker (24000 Tons), Brahmaputra class frigates, two Khukri class and Kora class corvettes. It built all the Seaward class, Trinkat class, Bangaram class, and Car Nicobar class patrol vessels.
Mazagon Docks: The yard has the capability to build warships, submarines, and merchant ships up to 30,000 Dead Weight Tons(DWT). Along with Frigates: Nilgiri Class, Godavari class, khukri class, Shavalik Class; Destroyers: Godavari Class Kolkatta Class, Shishumar class submarines and currently Scorpene.
Forget looking at "top" shipbuilders from Italy, Britian, US, Russia and China, It doesn't even come close to shipbuilders in it's own vicinity