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
Akismet - Akismet is a spam fighting service that protects millions of WordPress sites from comment and contact form spam.
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.
CleanTalk - Spam protection for WordPress, Joomla, Drupal, and any other websites
reCAPTCHA - reCAPTCHA is a free security service that protects your websites from spam and abuse.
UniqPin - UniqPin is a free for non-commercial use service which destiny improve ability of interfaces detect...
Solve Media - Solve Media's cost per engagement platform offers advertisers branded CAPTCHA and skippable Pre-Roll while providing publishers with enhanced security and a new revenue solution.