jetbuilder

Tired of bots submitting hundreds of spam comments in a minute and consuming your database resources? “Limit Daily Comments” is a pure, zero-configuration micro-plugin that intercepts traffic before it enters your spam box. Developed lovingly by the JetBuilder team.
Features: 
* Blocks users/bots from making more than a specific amount of comments per 24 hours via the same IP. 
* Ability to set a site-wide global daily comment limit to protect your server. 
* Beautifully designed backend UI dashboard statistics to track your blocked hits today and total hits. 
* Completely blocks connections using lightweight HTTP Error 429 (Too Many Requests), avoiding database server overload. 
* Bypasses Admins automatically. 
* Compatible with CDNs like Cloudflare (correctly retrieves X-Forwarded-For IP). 
* Extremely fast logic with zero overhead footprint.

JetBuilder Daily Comment Limit

A lightweight plugin to block comment spammers by restricting the number of comments an IP can make per day. Includes a beautiful dashboard stats widg …

zazell

Prevent bots from spamming your inbox or otherwise inconvenient behaviour by limiting the number of times a form can be submitted from a single IP address. 
Simply configure the maximum number of submissions per period and the user will not be able to submit your Contact Form 7 forms anymore.

Rate limiting for Contact Form 7

Adds support to limit the number of Contact Form 7 form submissions per ip per period

JetBuilder Daily Comment Limit vs Rate limiting for Contact Form 7