WS Form includes a range of spam protection tools for forms in WordPress, including CleanTalk as a third-party service integration.
You can combine spam protection methods such as HoneyPot, NONCE, IP throttling, custom server-side validation, and keyword, IP, domain name, or user agent blocking.
WS Form also supports spam scoring with selected services. Submissions identified as spam are moved to the Spam folder on the submissions page.