Hello Siwani,

There are a lot of Indian IT consultancy firms out there and they say the are the best. But my saying is you can't know before entering into that.  Although I can give you some name  which you can dig into.

Miracle Software Systems Inc, MI, Ph 248-233-1105

Enternete business Systems Inc, Edison, Ph. 732 572 1300

American Professionals Inc, Woodbridge, NJ ,Ph: 732 750 4047 ,

Raj Conultants, Iselin, NJ  732 382 3000

Good Luck....