Most funnels are built on Clickfunnel due to the software being so popular. However, I have built funnels on various other platforms such as Kajabi, Thinkific, Kartra, Podia, Unbounce, WordPress, and other new software in the market. I have been creating websites, funnels, and software for more than 9 years. This experience allows me to use any tools available in the market because they all work on the same concept. Nevertheless, I always recommend going with Clickfunnel due to them being market leaders and the features they offer.