cleantalk

Anti-DDoS-Lite (Anti-Crawler app) is a small PHP app to protect your site against DDoS attack.

PHP spam protection. CAPTCHA-free and reCAPTCHA alternative. Powered by background scoring without challenging website visitors.

Python spam bot filter. Invisible CAPTCHA alternative

Ruby spam protection for forms. Alternative to reCAPTCHA. No CAPTCHA. Bot filtering.

Security & Malware scan by CleanTalk

WP Anti-Spam

C# spam protection for web forms. reCAPTCHA alternative

Anit-spam extension for Yii framework.

Nodejs API for antispam service cleantalk.org. Invisible protection from spam, no captches, no puzzles, no animals and no math.

UniForce - Universal Security plugin and Firewall for websites

Antispam extension for MediaWiki.

CleanTalk Anti-Spam extension for phpbb v3.1.X & v3.2.X & v3.3.X

Anti-spam MOD for Simple Machine Forum

Joomla 3+ Anti-Spam by CleanTalk

XenForo anti-spam addon.

Module for any CMS

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

MyBB Anti-Spam plugin

Spam bot protection for Yii2 forms. CleanTalk API

Anti-spam plugin for Joomla 2.x