Anti-spam Alternatives

StopForumSpam - a database of known forum and blog spam, its sources and the email addresses reported

Say Goodbye to comment spam on your WordPress blog or website.

Verify your customers in under 15 seconds anywhere in the world with a cutting-edge SaaS & API platform for Identity Verification and AML/KYC compliance.

Try for free freemium $0.1 (per credit)

Open-source implementation of server-side spam filtering of blog comments and forum posts.

Akismet is a spam fighting service that protects millions of WordPress sites from comment and contact form spam.

Spam protection for WordPress, Joomla, Drupal, and any other websites

Open Source Free Trial $12.0 / Annually

Allows you easily scan for and delete scam comments using several methods. - GitHub - ThioJoe/YT-Spammer-Purge: Allows you easily scan for and delete scam comments using several methods.

Mollom is a freemium web service to get rid of spam, unwanted content and fake users on your...

The better, new standard to stop spam content.

freemium $49.0 / Monthly (Unlimited Websites, 100K API Calls)

Grow your Twitter with valuable followers, effortless

reCAPTCHA is a free security service that protects your websites from spam and abuse.

Do you use a captcha to keep out bots? hCaptcha is a drop-in replacement for reCAPTCHA that earns website owners money and helps companies get their data labeled.

A lightweight (~217 bytes vanila JS at frontend) and privacy-friendly plugin to prevent spam comment in the default commenting system of WordPress. Works instantly. No settings required. No captcha.

Intent-based spam detection for web forms.