12 Companies Leading the Way in clickfunnels monthly cost
http://www.volverene.com/how-to-improve-your-b2b-profitability-using-a-advertising-and-marketing-funnel-management-program/
This post duplicates the scope of other articles, specially, Funnel analysis. Remember to talk about this problem on the chat web page and edit it to conform with Wikipedia's Manual of Style. Conversion funnel