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Device intelligence, explained plainly.

Guides on how device fingerprinting works, what it can and cannot tell you, and how to turn it into fair decisions against bots, multi-accounting and fraud.

  • FundamentalsWhat fingerprinting is and is not.
  • Fraud preventionPlaybooks that stay fair.
  • Network signalsVPN, proxy and Tor in context.
  • IntegrationWeb, iOS and Android.

All guides

EXPLAINER / DEVICE FINGERPRINTING

What is device fingerprinting?

Read the explainer
FIELD GUIDE / FINGERPRINTING VS COOKIES

Browser fingerprinting vs cookies.

Compare the two
FIELD GUIDE / MOBILE SDKS

Mobile device fingerprinting on iOS and Android.

Read the mobile guide
EXPLAINER / PRIVACY AND GDPR

Is device fingerprinting legal? Privacy, consent and GDPR.

Read the privacy explainer
FIELD GUIDE / ACCURACY AND LIMITS

How accurate is device fingerprinting?

Read the field guide
EXPLAINER / ABOUT FINGERLY

What is Fingerly?

Meet Fingerly
HOW-TO / BOT DETECTION

Bot detection for signups and logins, without a wall of captchas.

Read the how-to
PLAYBOOK / PROMOTION ABUSE

Prevent multiple accounts and promo abuse, one device at a time.

Read the playbook
PLAYBOOK / ACCOUNT TAKEOVER

Stop account takeover with device signals, not more passwords.

Read the playbook
HOW-TO / NETWORK INTELLIGENCE

How to detect VPN, proxy and Tor traffic, and what to do about it.

Read the how-to
PLAYBOOK / MOBILE APP FRAUD

Mobile app fraud: emulators, clones and tampering, and what you can detect.

Read the playbook
PLAYBOOK / BUILD VS BUY

Build or buy device identification? An honest guide for engineering teams.

Read the guide
BUYER’S GUIDE / PRICING

How much does device fingerprinting cost?

Read the buyer’s guide
COMPARISON / BOT DEFENCE

Device fingerprinting vs CAPTCHA: which one stops bots?

Read the comparison
COMPARISON / IP ADDRESSES

Device fingerprinting vs IP address blocking.

Read the comparison
HOW-TO / MULTI-ACCOUNTING

How to detect multiple accounts from one person.

Read the how-to
HOW-TO / TRIAL ABUSE

How to stop free trial abuse without hurting conversions.

Read the how-to
HOW-TO / REFERRAL FRAUD

Referral fraud and reward abuse prevention.

Read the how-to
HOW-TO / FAKE SIGNUPS

How to stop fake signups and spam accounts without punishing real users.

Read the how-to
HOW-TO / CREDENTIAL STUFFING

Credential stuffing and login protection: stop the bots, keep the customers.

Read the how-to
EXPLAINER / AUTOMATION

Headless browsers and automation detection: telling a script from a person.

Read the explainer
EXPLAINER / MOBILE INTEGRITY

Rooted and jailbroken devices: what they mean for fraud, and what to do about them.

Read the explainer
EXPLAINER / SPOOFING

Anti-detect browsers and fingerprint spoofing: what can and cannot be caught.

Read the explainer
EXPLAINER / DEVICE FARMS

Device farms and click farms, explained: how abuse scales and what you can detect.

Read the explainer
FIELD GUIDE / DEVICE INTELLIGENCE

What a device can tell you about a session.

Read the field guide
SIGNAL NOTES / NETWORK CONTEXT

VPN, proxy, or Tor? Know the difference.

Explore the signal notes
PLAYBOOK / BETTER DECISIONS

Build a risk policy. Not a wall.

Read the playbook
[ IDENTIFY ][ UNDERSTAND ][ DECIDE ][ FINGERLY ]
Less guessing. More knowing.

Make the next connection a trusted one.

Start with the signals, keep your own decisions, and pay as you go, only for what you identify. No credit card needed.