Introducing Cloudflare Turnstile for smarter spam control

Keeping your forms secure should not mean making your users jump through hoops. That is why Zoho Forms now supports Cloudflare Turnstile, a modern, privacy-friendly alternative to traditional CAPTCHA systems. 

Unlike conventional CAPTCHAs that interrupt users with “click all the traffic lights” tests, Cloudflare Turnstile works quietly in the background. It verifies human interactions through browser checks for a cleaner, faster, and far more user-friendly experience.

Why Cloudflare Turnstile? 

Cloudflare Turnstile blends security and simplicity. It is designed to protect your forms from spam and bots while keeping the submission flow effortless for real users. Behind the scenes, it performs intelligent verification without collecting unnecessary data to ensure both safety and privacy.

Flexible verification modes 

No two forms serve the same purpose, and neither do their audiences. A registration form for an event, for example, might need quick, uninterrupted submissions, while a public feedback form might demand tighter security. That is why Cloudflare Turnstile offers 3 flexible verification modes, allowing you to fine-tune how human verification happens on your form. 

1. Managed Mode 

In this mode, Cloudflare Turnstile quietly studies user behavior and automatically decides when to show a challenge. Most genuine users glide through without interruption, while suspicious activity triggers extra checks. It is intelligent, adaptive security that knows when to step in and when to stay invisible.

2. Non-Interactive Mode 

If you prefer to keep the process nearly invisible, Non-Interactive Mode does exactly that. Instead of presenting prompts, it simply displays a small loading spinner while running background verifications.

3. Invisible Mode 

Invisible Mode keeps verification completely out of sight. There is no spinner, no delay, and no visible indication that a check is happening. Yet, every submission is silently authenticated, giving you protection with zero disruption to your form’s visual experience.

When verification fails 

Zoho Forms gives you complete control over what happens next. If Cloudflare Turnstile detects suspicious activity or fails to verify a submission, you can choose how your form responds.

• Block the submission entirely and display a clear message explaining why the form could not be submitted, protecting your form from unverified or automated entries.
• You can also enable Zoho Forms’ built-in CAPTCHA as a fallback option to offer a second layer of validation. This way, genuine users who might have been mistakenly flagged still get a fair chance to complete their submission after a quick human check. 

Learn how to configure Cloudflare Turnstile in Zoho Forms

Zoho Forms already supports Google reCAPTCHA v2 and v3, which have long helped users keep spam at bay. So why bring Cloudflare Turnstile into the mix? The answer lies in choice and user experience. By offering Cloudflare Turnstile alongside reCAPTCHA, Zoho Forms gives you the freedom to choose the security solution that best aligns with your needs in terms of user privacy and your desired form experience. 

Learn more about spam control techniques in Zoho Forms