HappyForms is an all-in-one WordPress plugin that makes it easy to create attractive forms that encourage conversions.
Also, We wrote a comparison where we also added HappyForms which you could find here: https://syncwin.com/comparison/wordpress-form-builders/
PS. If you are looking to add an alternative form builder plugin to your toolbox then consider grabbing this deal as it's one of the most affordable options out there AFAIK.