Technically No. You don't have to use ClickFunnels for the affiliate marketing training. You can still learn how online businesses work, but you’ll need ClickFunnels later (in the third week). However, you will greatly benefit from the sales funnel software. Simply get a 14-day free trial here (so you’ll be able to complete the challenge without needing to pay for it). Full ClickFunnels review can be found here.