OOPSpam Anti-Spam API is a powerful anti-spam filter for contact forms, comment systems, live chat- the limit is your creativity!
OOPSpam Anti-Spam API's advantages over alternatives:
We also have a WordPress plugin, get it here: OOPSpam Anti-Spam – WordPress plugin | WordPress.org
reddit shell - Web-based shell for browsing reddit (pretend you're working)
Akismet - Akismet is a spam fighting service that protects millions of WordPress sites from comment and contact form spam.
narwhal - Narwhal is a simple iOS app for reddit.
CleanTalk - Spam protection for WordPress, Joomla, Drupal, and any other websites
Reddit - Reddit gives you the best of the internet in one place. Get a constantly updating feed of breaking news, fun stories, pics, memes, and videos just for you.
hCaptcha - 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.