Open Source PlayThru Alternatives
PlayThru is described as 'The PlayThru is the next generation of online human verification. It is designed to be more simple, more intuitive, and more fun than the current CAPTCHA options'. There are six alternatives to PlayThru for various platforms. The best alternative is visualCaptcha, which is both free and Open Source.
- A configurable captcha solution, focusing on accessibility & simplicity whilst maintaining security. View 12 alternatives to visualCaptcha
Discontinued
As from Dec 26, 2016: Please note visualCaptcha is no longer actively developed. It still works and should continue to, but it won't be improved by the initial team anymore. ...
Source: https://github.com/emotionLoop/visualCaptcha/blob/master/README.md- Free • Open Source
- Self-Hosted
- A plugin to make the process of creating a negative captcha in Rails much less painful. View 11 alternatives to Negative Captcha