Ontario Consultants on Religious tolerance has listed 40 religions with 75% content on Chrisitianity.
The Ontario Consultants on Religious Tolerance have also listed 15 non-theistic beliefs, ethical groups, philospohies, spiritual paths, ect.
There are on the order of 1,200 Christian organizations in North America, and over 30,000 in the world.
According to David Barrett et al, editors of the "World Christian Encyclopedia: A comparative survey of churches and religions - AD 30 to 2200," there are 34,000 separate Christian groups in the world AND that is just the Christian groups and they all don't believe the same thing which is why churches break apart. ie. Catholics, Protestants, Restorationists, Anglicans, Pentecostals ect. Most believe they are the true Christian Religion even though within their own groups they disagree.