What is a good Mail Optin plugin that has minimal impact on speed and works with caching plugins ?

I had narrowed down my list to Thrive Lead and Convert Pro. However, upon further research I learned or I saw an issue on a Cloudlfare Discussion how 1 guy had an issue with it since it was not working with CLOUDFLARE.
Since I will not be using any of their fancy modules, I am thinking maybe I should use a Forms plugin instead ?
Thanks

 

This site will teach you how to build a WordPress website for beginners. We will cover everything from installing WordPress to adding pages, posts, and images to your site. You will learn how to customize your site with themes and plugins, as well as how to market your site online.

Your Advertisement Here