An add-on for Contact Form 7 that will let you to hide only Success Message after defined time.

essitco

CAPTCHA Solution

CAPTCHA Solution is a CAPTCHA module intended to be called from other plugins. It is originally created for my Contact Form 7 plugin.

raoinfotech

RAO Forms

Manage Website or APP form submissions at one place i.e. RAO Form Builder.

Rohil

Contact Form 7 : Hide Success Message will allow you to simply hide the message with Effect after some delay time.
Now you can also hide validation and failed message with premium plugin (Only $2)
Features
<ul>
<li>You can choose effect.</li>
<li>You can speed time of the effect.</li>
<li>You can decide delay time(after that time message will disappear)</li>
<li>You don’t need to deactivate the plugin. You can disable plugin from the Setting page.</li>
</ul>
Many user want to hide success message that is been generated after email has been sent successfully but somehow they are not able to find it on google.So this plugin will allow them to hide it wihout any coding or additional settings.
We always welcome your <a href="https://wordpress.org/support/plugin/contact-form-7-hide-success-message" rel="ugc">suggestion</a> and We are always there to support you.
<a href="https://wordpress.org/support/plugin/contact-form-7-hide-success-message" rel="ugc">Support Page</a>
Even Contribution is also welcome. Contact me through rohilmistry [dot] ymail [dot] com.
NOTE: You need to enable the plugin from its setting tab and then only message will be hide otherwise it will remail there.It will only hide the SUCCESS MESSAGE. 
INITIAL RELEASE

Alternatives to Contact Form – 7 : Hide Success Message

Top alternatives