hCaptcha works along similar lines to Google’s version but offers more methods of identifying and blocking bots.
Sign up at: https://hcaptcha.com
You can download the new extension via the Extension Manager: Menu->Tools->Extension Manager->Online Gallery->Forms
Please read the included documentation for help.
More information
https://www.wysiwygwebbuilder.com/hcaptcha.html
Tip
If you find my extensions useful and would like me to continue to make improvements or create new extensions, then please consider making a PayPal donation:
https://www.wysiwygwebbuilder.com/donate.html