The current headline only explains what the product is but does not say why is unique or better than the others. (Why should I choose your product?)
You mention “pioneer referral marketing”, “high ROI” and some numbers but how can I know this is true? You could add a list of features and some reviews from trusted sources to build up more credibility.
I saw you have some big clients which tells me the price could be quite expensive for small business so its important to tailor your message and say who is your product for; SMB or enterprise. if you target SMBs then mention things such as “Painless”, “Quick set up”, “No coding required”, “From XX.XX a month” etc.
If you target enterprise try to use the testimonial of certain company or even better a video of enterprise users telling their success story with your product.
Call to action
In the “Get demo” button if you offer a free trial you could AB test: “Start now for free” and I would suggest to AB test the form without the popup.
If you target enterprise then “Get demo” should be ok.
Sorry for my English and good luck!