The modern spam protection. Protects your forms from spam by simply checking the content. Open source, Free to use, Accessible, and Self-Hosted.

„... another popular solution to fight spam is Antispam Bee“ – Matt Mullenweg, Q&A WordCamp Europe 2014

List of disposable email domains. You can use it to block fake users on your newsletter.

The WordPress Zero Spam plugin makes blocking spam a cinch without all the bloated options. Just install, activate, and say goodbye to spam.

The Swiss Army Knife of battling form spam in your Symfony application!

🥳🔐 Protect your users from using spam emails on signup/form/apis in your Laravel apps

Caterpillar Proxy - The simple web debugging proxy (formerly, php-httpproxy)

Federated Threat Intelligence Service

Challenge/response spam shield for TYPO3 form extension

IPS Community Suite 4.0 (IP.Board) anti-spam extension.

This WordPress plugins adds the required functionality to use mosparo in your WordPress form.

Wrapper for API www.stopforumspam.com (api.stopforumspam.org)

Dam Spam is a WordPress plugin to help keep spam at bay. Fork of Stop Spammers.

AntiSpam/AntiTerror Content Spam/Ham Training+Testing API

A Symfony bundle for mosparo spam protection

A PHP library to communicate with mosparo.

MASPIK can block form spam emails from being delivered to your inbox!

Specifications for mosparo, like JSON schemes

A plugin for Kirby that provides a spam guard for the Uniform Form plugin. It uses extendable word lists and weights and counts links and emails to determine if a message is spam.

A custom SMTP Honeypot written in PHP, with focus on gathering intel on threat actors and for doing spam forensic work