You can create a contact form with Uncode with the popular Contact Form 7 plugin. Contact Form 7 enables you to manage multiple contact forms, plus you can easily customize forms and the mail contents with simple markups. Contact Form 7 supports Ajax-powered submitting, CAPTCHA, Akismet spam filtering, and more.
To implement this feature, you need to install the CF7 Plugin from Uncode > Install Plugins. Once you have installed the plugin, simply create a form using the CF7 plugins’ options, and insert in your page with the dedicated Visual Composer Contact Form module. If you need to customise the button appearance you can modify the button class as you can see from this screenshot.
Gravity Forms for WordPress is a full featured contact form plugin that features a drag and drop interface, advanced notification routing, lead capture, conditional logic fields, multi-page forms, pricing calculations and the ability to create posts from external forms.