I'd love to help with a call through Clarity.
From the looks of your site there is no clear call to action. The form on the bottom of your home page is too broad in my humble opinion. But most importantly there's nothing on your site that speaks to the target market you're going after, startups.
As far as sales funnels can you tell me more? Do you have a sales funnel in place in place you're looking to optimize or are you looking for advice on creating one?