GDPR compliant secure Captcha

Use One Captcha to protect their websites and online services from spam and abuse. One Captcha respects the privacy of its users and uses end-to-end encryption.

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GDPR Compliant

Verified Accessibility

Welcome to One Captcha

We've taken a fresh approach to safely protecting your websites and online services from spam and bots.

One Captcha does not rely on tracking your users and leveraging personal data.

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Experience One Captcha firsthand

When the user clicks the CheckBox, our program will automatically display an interactive quality query to the user. When the user completes, the program will automatically determine whether the user is human.

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Why One Captcha?

We are a China-based studio with a global team committed to meeting the highest global quality and data protection standards. With cutting-edge technology, we protect your organization from bots.

Defense Robots

Use our smart algorithms and analytics to easily and quickly determine if a user is human.

Protecting the privacy of users

One Captcha is privacy-focused and fully GDPR compliant. We do not store your users' personal data.

Improve user experience

Just drag the slider to the corresponding position to quickly complete the verification.

Secure Core Server

With data centers located in the EU, US, Asia, and around the world, you can still use it even if a server in one region fails.

All features

Understand the functionality of One Captcha and use it.

SECURITY

Strong encryption

We use only strong encryption to protect your internet connection. This means we encrypt all your web traffic with AES-128, exchange keys with 4096-bit RSA, and use HMAC with SHA256 for message authentication.

PRIVACY

No-log policy

We use a no-log policy to protect user privacy.

PRIVACY

GDPR compliant

One Captcha complies with GDPR regulations and does not collect any data. You can also view our code.

USER

Open source

Our products are all open source, so anyone can review our code. We also regularly commission independent audits so you know they are secure.

USER

Easy to use

Adding One Captcha only takes a few minutes and a few lines of code. Our API is compatible with other CAPTCHAs, allowing you to switch quickly.

USER

Unlimited Requests

We place no limit on the amount of data you can use while connected to our Service.

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Data Center

One Captcha runs over 110 virtual hosts in Amazon's 6,500+ data centers.

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Live Help

If you have any questions, please contact our friendly and knowledgeable support team.