Question: I need a CAPTCHA alternative that doesn't require users to complete challenges, is there a solution that's fully accessible and user-friendly?

One prominent alternative is hCaptcha. This AI security service can detect bots and prevent fraud without requiring personally identifiable information (PII). It's customizable and adheres to privacy regulations around the world, so it's a good all-purpose and privacy-focused option for businesses trying to protect their services.

Another strong contender is GeeTest. This AI-based service offers multiple CAPTCHA variations, including Adaptive CAPTCHA v4, designed to stop fraud without burdening users. It's privacy focused, gathering no personal or sensitive information, and has a 3-step integration process, so it's relatively easy to get up and running.

If you're looking for something more specifically designed to be user friendly, check out Friendly Captcha. It replaces user labeling tasks with proof-of-work mechanisms and invisible CAPTCHA, is GDPR compliant and can automatically detect risks. It also supports multiple domains and can handle a high volume of requests, so it's suitable for companies large or small.