Contact Form 7 Database Addon (CFDB7) saves the Contact Form 7 submissions to the WordPress database.
You do not have to configure the Contact Form 7 Database Addon at all. You simply need to install the plugin, and it automatically begins storing all the form submissions from the submissions.
This plugin lets you export the Contact Form 7 submissions data to a CSV file.
Furthermore, the plugin uses a single database table for all forms making it user-friendly and easy to customize.
Contact Form 7 Extensions can give users many of the functions available in some of the well-known premium form plugins.