Hello,
We apologize for the inconvenience you have experienced with the CAPTCHA integration in the Form Builder addon.
Currently, SP Page Builder supports the following CAPTCHA integrations:
- Joomla's Proof of Work CAPTCHA
- Google reCAPTCHA
- hCaptcha
- Cloudflare Turnstile
These are the CAPTCHA options officially supported by SP Page Builder. The supported integrations and configuration details are also listed in our documentation here:
SP Page Builder Form Builder – CAPTCHA Documentation
The third-party plugins you mentioned, such as HashCash and ALTCHA, are not currently supported integrations in SP Page Builder's Form Builder. Therefore, their CAPTCHA functionality may not work correctly through the standard CAPTCHA integration.
We understand your suggestion regarding unsupported CAPTCHA plugins being unavailable for selection. We will take this feedback into consideration for future improvements.
Thank you for bringing this to our attention, and we apologize again for the inconvenience.