In a way to building a successful site, prevent spam comments is an important part but not easy to achieve it. But don’t worry and there are some recommendations for prevent spam comments. They contains more powerful options but not listed here.
Comments Blacklist Manager
Built into WordPress is a comments blacklist that allows you to add words/phrases that are found in a comment will automatically move that comment to the trash on your site. You can manually add things there but using the Comments Blacklist manager plugin you can pull in a custom list of common words/phrases used by spammers. Click here to learn more about it.
Antispam Bee
A great tool that gives you settings that can greatly reduce/prevent spam. It’s a more complete solution than comments blacklist but without using reCaptcha or running your data through a paid service like Akismet. Click here to learn more about it.