Contact form 7, please just follow the link below to add the "html_id" to the contact form 7 shortcode. 

https://contactform7.com/faq/can-i-add-id-and-class-attributes-to-a-form-element/

when viewing the source, you will see "wpcf7" listed several times on the form and inputs

that stands for "WordPress Contact Form 7"

Example below:

current example: (this is not your actual current)

[contact-form-7 id="1234" title="Contact form 1" ]

New with id attribute

[contact-form-7 id="1234" title="Contact form 1" html_id="contact-form-1234" ]

You can make the id anything you would like. Once this is complete, you should be able to detect the forms from Visual Visitor.