Instapage features a unique feature known as the “Instapage squeeze page” which essentially grabs email addresses from potential leads by offering them something valuable in return. You can alert your website visitors of important information such as newsletters, whitepapers, case studies, webinar information, or video links in return for their email capture. Instapage splash pages are essentially Instapages version of landing pages which allow you to engage with and persuade your visitors to interact with different parts of your website.
Unbounce also lets you create sticky bars for your site. These bright forms draw attention to the offers and help to get more conversions without paying for more traffic. The editor allows you to add pop-up windows (which are called overlays here) on exit, on arrival, after a delay, on a scroll, or on click. There are plenty of pop-up templates to choose from, and you may also customize them. This feature is not available with Instapage.