Existing CAPTCHAs often trade-off between user experience and privacy. Google's reCAPTCHA, while user-friendly, falls short on privacy. Alternatives like Friendly Captcha, despite being GDPR-compliant, can be expensive, and traditional CAPTCHAs frustrate users with their complexity.

I've developed an alternative for withoutbg.com, a background removal API service. My custom CAPTCHA asks users to select foreground objects in images, offering a middle ground between engaging users and deterring bots.

Technical Details: I used a collection of joyful, Unsplash-sourced images (think ice cream, kites, etc.) that occupy a small portion of each image. Each image comes with a corresponding mask that defines the foreground region. When a user clicks on an image, I validate the click by checking if the coordinates fall within the masked foreground region. This approach not only enhances user engagement but also ensures a bot deterrence mechanism.

Check it out and let me know your thoughts. I'm seeking constructive feedback to improve it further.