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Device Intelligence

Resilient device fingerprinting

Castle's fingerprinting circumvents ad blockers and privacy plugins, with 99.5% accuracy and a 0.001% collision rate.

99.5% accuracy

Pinpoint up to 99.5% of returning users, cookie-independent.

0.001% collision rate

Trustworthy fingerprints with industry-leading low collision.

Never blocked

Stealth mode defeats privacy plugins, ensuring 100% coverage.

Web and mobile

Seamless setup for browsers, iOS, and Android to track usage.

Optimization

Fingerprinting optimized for account scenarios

Fingerprinting fine-tuned for account abuse. High accuracy and low collisions keep genuine users in and alert the right person.

Up to 99.5% accuracy

Consistently identify returning users with industry-leading precision, even without cookies.

Ultra-low 0.001% collision rate

Minimize false positives to ensure legitimate users aren't mistakenly flagged or blocked.

Ad blockers won't obstruct any of our requests

Stealth fingerprinting technology bypasses privacy plugins and ad blockers for complete coverage.

Intelligence

Real-time device intelligence via API

Use collected device data in the rules engine and analytics suite. The backend SDK responds in 150 milliseconds, regardless of scale.

Returns device fingerprint, user agent, and more

Comprehensive device data including unique fingerprints and browser information via fast API.

Reveals IP geolocation, proxy, Tor, and datacenter status

Detect suspicious network usage including VPNs, proxies, and datacenter IPs for risk assessment.

Exposes carrier, uptime, incognito, adblocker, and more

Detailed device state information including network carrier, system uptime, and privacy settings.

Bot Detection

Detect bots and headless browsers

Analyze interactions like mouse movements to tell humans from bots. Browsers are also scanned for headless signatures and privacy plugins.

Receive a bot score ranging from 0-100

Get a granular risk score to make informed decisions on blocking or challenging suspicious traffic.

Detect headless browser usage

Identify automated scripts running in headless browsers like Puppeteer, Playwright, or Selenium.

Analyze mouse and keyboard interactions

Examine behavioral patterns to distinguish genuine human activity from scripted bot actions.

Get started

Create your free account today

Start with a free quota, with transparent pricing that scales when you do.