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.
Antispam Bee Alternatives
Antispam Bee is described as 'Say Goodbye to comment spam on your WordPress blog or website. Antispam Bee blocks spam comments and trackbacks effectively, without captchas and without sending personal information to third party services. It is free of charge, ad-free and 100% GDPR compliant' and is a Anti-Spam tool in the security & privacy category. There are more than 10 alternatives to Antispam Bee for a variety of platforms, including Self-Hosted, Wordpress, Web-based, Linux and Windows apps. The best Antispam Bee alternative is Akismet. It's not free, so if you're looking for a free alternative, you could try Akismet or StopForumSpam. Other great apps like Antispam Bee are CleanTalk, Forum Fortress, Mollom and Sblam!.