One of our tours in New Dehli was the Bahai House of Worship, also known as the Lotus Temple. This was completed in 1986 and serves as the Mother Temple. CNN reported it as the most visited building in the world in 2015 with perhaps 4 million visits per year.
There appears to be over 2 million Bahai worshipers in India at this time. We managed to get in just as they were finishing a service. The singing was quite sublime.
I am not sure most would agree with the following statement, but some of the research shows that the growth of the Bahai Faith in India has been greatly assisted by the recognition of Krishna as a Messenger or Manifestation of God, alongside Jesus, Muhammad, Zarathustra and Baha u llah himself.