IT companies startup list

This sort of list is just not possible - let me explain why:

1. Everyday many companies are opening and closing operations. There may not be clear bifurcation between product vs service as companies try both initially
2. The list may be very large with people creating companies just for offering freelancing services

However, that being said - there are several alternatives for finding product companies worth checking:

1. Check funding data from platforms like crunchbase, yourstory, vccircle
2. If you still need the entire companies list, download the ROC Bangalore list - it lists all companies registered with government

Hope it helps!