Blocking spam on WordPress websites is heavy work. Akismet comes pre-installed on every site, but it’s not free for businesses or the only way to stop spam.
- OOPSpam https://www.oopspam.com/
- CleanTalk https://cleantalk.org/
- Stop Forum Spam https://www.stopforumspam.com/
- Project Honey Pot https://www.projecthoneypot.org/
- Zero Spam https://www.zerospam.org
There are a ton of anti-spam WordPress plugins. The criteria for this list of alternatives is “offers an API.”