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Enterprise Layer Intelligence
Categories/Cybersecurity/Castle
Castle

Castle

Founded 2016

Detect bots and prevent account abuse across web and mobile applications

Pricing model

Free Tier, Paid

You can use Castle to protect your applications from automated attacks, credential stuffing, and account takeovers. It provides APIs and SDKs that inspect visitor IP addresses, generate device fingerprints, and assess risk scores in real time. You can monitor user sessions, spot impossible travel anomalies, detect residential proxies or disposable email domains, and trigger custom responses like step-up authentication or outright blocks. Castle also stores historical session data so your security team can audit incidents and track emerging abuse patterns.

What Castle does

Inspect incoming IP addresses for proxy and datacenter trafficGenerate device fingerprints to track persistent bad actorsConfigure custom fraud rules and automated response policiesChallenge suspicious logins with multi-factor authentication promptsReview historical session logs to investigate security incidentsBlock disposable email domains during account registrationMaintain allowlists and denylists for specific IPs and user IDsDevice fingerprinting to identify unique hardware and browser tamperingIP intelligence to flag datacenter IPs, VPNs, Tor, and residential proxiesAutomated risk scoring for account takeover and general abuseBehavioral analysis to spot impossible travel and velocity spikesEmail address intelligence to uncover disposable domains and aliasesCustomizable rules to deny, challenge, or permit user actionsAudit log retaining up to 18 months of historical session eventsDynamic list management for blocking or trusting specific users and devices

Pricing breakdown

Pricing model: Free tier, Paid

PlanList price
FreeFree
Pro$200 / mo

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Castle, bot detection, fraud prevention, account takeover prevention, device fingerprinting, IP intelligence, proxy detection, credential stuffing, behavioral analysis, email risk scoring, security analytics, rate limiting, user verification, risk scoring, threat intelligence