Fingerprint | Identify Every Web Visitor & Mobile Device

Stop fraud, detect bots & AI agents, and delight customers. Identify good and bad visitors with industry-leading accuracy — even if they're anonymous.
Install guide for AI agents: https://fingerprint.com/get-started.md. Or run npx fingerprint or npx skills add fingerprintjs/skills.
Or open in Claude Code, Codex, Cursor
Enable trusted bots and AI agents to act for real users. Block malicious ones.
Smart Signals surface 100+ bleeding-edge attributes built by our world-class research team, so you can spot risky traffic before it becomes fraud.
Identifies and verifies AI agents using Web Bot Auth cryptographic signing, distinguishing verified agents from spoofed ones.
Industry-leading accuracy that lasts for months or years, even when cookies are cleared.
Identify returning web and mobile app visitors on all browsers, iOS, and Android, with exceptional accuracy.
Get details on suspicious visitors even when VPN, incognito mode, or a tampered browser or device is used.
Personalize user experience and reduce 2FA and OTP requirements by identifying logged-out users.
Identify returning web and mobile app visitors on all browsers, iOS, and Android, with exceptional accuracy.
Get details on suspicious visitors even when VPN, incognito mode, or a tampered browser or device is used.
Personalize user experience and reduce 2FA and OTP requirements by identifying logged-out users.
The device intelligence platform for visitor intent. Reduce friction for the good guys. Stop the bad guys.
Identify and block login attempts using stolen credentials while recognizing legitimate users.
Reduce fraudulent transactions and increase legitimate conversions with device intelligence signals.
Prevent SMS pumping fraud attacks and SIM swapping scams with mobile device intelligence signals.
Detect malicious bots, automation tools, and other sophisticated threats to prevent real-time attacks.
See how our customers stop fraud in real time for real results.
Head of Payment Fraud @ Booking.com
Head of Payment Fraud @ Booking.com
Prashanth Yerramilli
Manager - Platform Abuse Team @ Dropbox
Director of Engineering @ JumiaPay
Senior Applied AI Manager @ Trustpilot
For Developers_ _ For Developers
So powerful, our competitors use Fingerprint open-source under the hood.
in fraud losses prevented in the last 12 months_
unique browsers and mobile devices identified annually_
real-time device intelligence API events per day_
Collect visitor IDs and signals instantly for free, or reach out to our team for a demo.
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