There are multiple levels to this question. Most people say Jesus was the founder of Christianity. Best to sit on top of the facts and let them speak for themselves:
- Jesus did not start a religion; he taught about the Kingdom of God.
- His followers and disciples worshipped him and called it The Way. These groups became communities which were eventually called Churches
- Paul founded the Church and formed the Church in discipline and faith with his missionary visits to the Churches and his letters.