There three electric bicycle manufactures, I come across in India so far.
Ampere - Located at coimbatore , tamilnadu. They produce electric bikes and cycles. There are some user reviews available in YouTube.
Veridian - Located Vijayawada. They launched electric bicycles.
Falco - situated at Pune. They produce bicycle motors for western and European countries. Their conversion kit is not sold in India.
BSA and Hero companies also entered into battery powered cycles few years back( thunderbot, pedelac), but available in their retail outlets nowadays.