SilentShield

SilentShield is an invisible, GDPR-compliant CAPTCHA alternative that replaces image puzzles and checkboxes. It detects bots through behavioral analysis and a proof-of-work nonce, with no cookies and no cross-site tracking. Every plan hosts data in the EU by default, meets WCAG 2.1 AA accessibility, and offers free and paid tiers behind a single API key.

Why SilentShield

Why Choose SilentShield?

The all-in-one invisible bot protection built for privacy, accessibility, and performance. No puzzles, no tracking, no compromise.

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EU hostingNo cookies<10 KB
SilentShield
  • EU hosting100% EU
  • Cookies0
  • Script< 10 KB
  • GDPRArt. 28

The difference

Visible CAPTCHA vs. invisible protection

Drag the slider: the usual CAPTCHA puzzle on the left, SilentShield on the right — same form, zero friction.

With SilentShield
With CAPTCHA

What Sets SilentShield Apart

Made in Germany, hosted in Germany

The check of your visitors runs on our servers in Germany, and the data is stored there. Via the EU endpoint, requests reach them directly, with no CDN in between.

Zero Cookies, Zero Tracking

No cookies are set and no profiles are built. Fingerprinting can be switched off with Zero-PII mode. No cookie banner required.

No Profiles

SilentShield sets no cookies and builds no profiles; the IP address is used only for the check. Privacy by architecture, not by policy.

GDPR/DSGVO Compliant by Design

Built from the ground up for EU data protection law. Via the EU endpoint, the check runs without passing through third countries.

WCAG 2.1 AA Accessible

Fully accessible for all users including those with disabilities. No visual challenges to solve.

AI-Powered Behavior Analysis

Proof-of-work combined with behavioral signals detects bots without interrupting real users.

25 Languages Built-in

Native support for 25 languages out of the box. No translation files to manage.

Transparent pricing

Free tier includes 500 requests per month. Paid plans start at just 9 EUR/month.

How SilentShield Compares

Feature
SilentShield
reCAPTCHAhCaptchaTurnstileFriendly Captcha
Price (Free Tier)500 req/moUnlimited (with tracking)Unlimited (with ads)Unlimited1,000 req/mo
Privacy / No TrackingNoNoNo
UX FrictionZeroHighHighLowLow
Accessibility (WCAG)AALimitedLimitedAAAA
Hosting in GermanyNoNoNo
Cookie-FreeNoNoNo
Languages25~70~40~30~15
Setup Time< 2 min~10 min~10 min~5 min~5 min

Try the Live Demo

Interact with the form below — watch SilentShield analyze your behavior in real-time.

your-website.com/contact
Protected by SilentShield

Behavior Analysis

Waiting
Mouse Movement0%
Keyboard Input0%
Scroll Behavior0%
Interaction Timing0%
Human Score0%

Start interacting with the form to see the analysis.

Ready to protect your site the right way?

Start free with 500 requests per month. No credit card, no tracking, no compromise.

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Frequently asked questions

Why choose SilentShield over other CAPTCHAs?

SilentShield is invisible by default, GDPR-compliant, and EU-hosted on every plan. It uses behavioral signals plus a proof-of-work nonce instead of image puzzles, sets no cookies, and stores no personal data. Real users are never interrupted, and you integrate with a single API key.

What makes SilentShield GDPR-compliant?

SilentShield hosts data in the EU by default on every plan, sets no cookies, performs no tracking, and stores no personally identifiable information — data is pseudonymised. Because there are no tracking cookies, it typically needs no consent banner, unlike CAPTCHAs that send data to third parties.

Is SilentShield accessible?

Yes. SilentShield meets WCAG 2.1 AA and shows no image puzzles or checkboxes, so it does not exclude users who struggle with visual challenges. Verification happens invisibly through behavioral signals and a proof-of-work nonce, keeping forms usable for everyone including assistive-technology users.

Does SilentShield slow down my site?

No. SilentShield loads a single lightweight client script from api.silentshield.io and verifies a proof-of-work nonce on your backend. There are no image assets to download and no third-party tracking calls, so it adds minimal overhead to page load and form submission.

How is SilentShield different from reCAPTCHA?

Unlike reCAPTCHA, SilentShield hosts data in the EU, sets no cookies, sends nothing to Google, and shows no image puzzles. It stores only pseudonymised data and meets WCAG 2.1 AA. You integrate with one API key rather than managing Google keys.

Do I need cookies or a consent banner?

No. SilentShield sets no cookies and does no tracking, so it typically does not trigger a cookie-consent requirement. Verification relies on behavioral signals and a proof-of-work nonce processed on EU infrastructure, with only pseudonymised data and no personally identifiable information stored.