ClickFunnels is a marketing suite of tools that helps entrepreneurs and entrepreneurs-in-the-making create sales funnels to generate leads and convert them into paying customers. It provides customizable templates to quickly set up landing pages, webinar sales funnels, and other automated systems to win online customers. On the other hand, Marketo is a marketing automation platform that allows large enterprises to create automated campaigns to nurture leads and customers throughout their buying journey. Marketo enables businesses to track ROI and fine-tune email campaigns and other marketing programs. In summary, ClickFunnels is better suited for entrepreneurs or small businesses that need a simple way to launch sales funnels, while Marketo is more suitable for large businesses with established lead nurturing strategies.