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2 votes
Accepted

Fully FOSS, self-hosted CAPTCHA?

Maybe this project: https://github.com/lepture/captcha Or this one: https://github.com/hasadna/OpenCaptcha
Yisroel Tech's user avatar
  • 1,562
2 votes
Accepted

Captcha library that doesn't need to load a new page?

recaptcha is a common solution provided by Google. The library contributes a required field to your form, blocking submission until the user has passed the challenge, so there's no risk of the user ...
ptim's user avatar
  • 144
2 votes

reCaptcha alternative

Securimage, or http://www.phpcaptcha.org is a great alternative that I recently found. Although I have not experienced its effectiveness. It is entirely self hosted open source, and runs in php and ...
Enjabain's user avatar
  • 495
1 vote

Fully FOSS, self-hosted CAPTCHA?

Another two open source and self-hostable Captcha solutions that are relatively well maintained as of today (2023-11-07). Please note that I have not tested any of them myself. mCaptcha is PoW-based ...
Vertganti's user avatar
1 vote

Captcha or other tool to check for human user

"Nocaptcha Recaptcha" (now called reCAPTCHA v2) and Invisible reCAPTCHA work the same way in the background. The only difference is that reCAPTCHA v2 uses its own button, while Invisible reCAPTCHA ...
browly's user avatar
  • 191

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