Contact Form 7 Database Addon – CFDB7的作者是Arshid,目前有300,000+个有效安装。已经Tested with 5.4.1版本的wordpress。
The “CFDB7” plugin saves contact form 7 submissions to your WordPress database. Export the data to a CSV file.
By simply installing the plugin, it will automatically begin to capture form submissions from contact form 7.
Features of CFDB 7

No configuration is needed
Save Contact Form 7 form submitted data to the database.
Single database table for all contact form 7 forms
Easy to use and lightweight plugin
Developer friendly & easy to customize
Display all created contact form 7 form list.
Export CF7 DB (CF7 Database) data in CSV file

Pro Addons

CFDB7 DB Switcher
Connect CFDB7 to an external database or another DB
Drag & Drop File Upload
Contact form 7 drag and drop files upload plugin.
Already Submitted?
Trigger error if a field is already submitted
CF7 Repeater
CF7 Repeater plugin allows creating one or more field dynamically
Popup Message
Replace your validation and success messages into beautiful popup message to attract visitors.
Export PDF File
Easy to export contact forms from database to PDF file

Support :
Extensions : Contact form 7 more Add-ons