It's pretty but the writing is terrible.

Everyone here (and me) seem confused with your value proposition. Let's break it down. And I am going to guess that the product is debugging tools for mobile apps?

"The Next Generation of App Building" -> this tells me almost nothing. Rewrite: "A comprehensive suite of tools to debug your mobile apps."

The next paragraph is pretty full of empty words too: "Vessel provides a comprehensive suite of tools in one vehicle, making it easy to solve problems and track progress - so developers can focus on inventing and building better mobile apps." Removing empty words: -> "All the tools you need in one place - so you can focus on building better mobile apps." Ah, that's better already.

Now, you can probably drop "A comprehensive suite of tools to debug your mobile apps." because "All the tools you need in one place - so you can focus on building better mobile apps." says the same thing.

Much shorter! Make that the headline.

One more round of editing to remove needless words (and add information about what KIND of tools these are):

"All the mobile debugging and profiling tools you need in one place."

Still needs lots of work, but you see what I mean by trying to improve the content. Remove needless words. Add actual meaning.

Add some actual information for developers below it in a paragraph. Like: works with iOs and Android. Free trial. Example implementation code.

Anyone else want to rewrite? I'm not the best writer.