The missionaries learned the local languages and made the new New Testament available in both Tulu and Kannada.

The majority of early native converts were from the Tulu speaking communities.

[2][3][4] The biggest denomination among Mangalorean Protestants is the Church of South India (CSI), composed of mainly Basel Mission and the Anglican Christians.

The CSI runs the Karnataka Theological College, one hospital and some technical schools in the region.

Other denominations include Jehovah's Witnesses, Pentecostals, Seventh-day Adventists, New Life Fellowship etc.