- I'd use Optimizely for this. They have a wysiwig editor that makes adding buttons really simple. Then you can test how many people click them (show different buttons, see who clicks what the most). It can get pretty pricy, but will be the least amount of effort. If you're looking to do a bit more work, then I'd recommend creating the buttons yourself and then using something like Mixpanel to record an event each time one is clicked.
- IMO strikingly is the fastest, most affordable way to prototype a beautiful sign-up page or simple website. I still use it to host the sites for Morning Short, and Commute Kit, my two most successful Product Hunt landing pages. Morning Short's conversion rates are over 15% and the whole site took less than two hours to design.