I read this about ReCaptcha:
- Unfortunately, as of 2011, some spammers appear to have figured out a way to bypass it, either through character recognition or by using humans. For that reason, it is not necessarily recommended.
- Part of the weakness of the ReCaptcha module is that ConfirmEdit doesn't include any penalty mechanism, so spam bots can simply keep trying to bypass the CAPTCHA until they get through. This is an issue that is strongly worth addressing in some way.
- Regardless of its strengths or weaknesses, reCAPTCHA can't be implemented on Wikimedia wikis because it produces a third-party dependency.
I need an alternative recommendation short of similar criticism to put in place of my ReCaptcha.
I do not want to pay any subscription or whatsoever.