hswplugins

Track form submissions that are successful, invalid, failed, spam or just just track everything.
Contact Form 7 forms are tracked by their names in Google Analytics under the Events tracking section.
Tracks all Contact Form 7 forms on your website automatically.

Contact Form 7 Analytics

A lightweight system to track Contact Form 7 Events in Google Analytics.

Ryan Nevius

An add-on for Contact Form 7 (CF7) that provides a straightforward method to redirect visitors to success pages or thank you pages, if their messages are successfully delivered. If no message is sent, or if there is an error with the form, the user will not be redirected.
NOTE: This plugin requires Contact Form 7 version 3.9 or later.

Contact Form 7 – Success Page Redirects

An add-on for Contact Form 7 that provides a straightforward method to redirect visitors to success pages or thank you pages.

Contact Form 7 Analytics vs Contact Form 7 – Success Page Redirects