IPQualityScore

IPQualityScore is a fraud detection and cybersecurity platform built to help businesses identify bad actors and verify the legitimacy of transactions, accounts, and users in real time. At its core, it analyzes IP addresses, email addresses, phone numbers, and device fingerprints against patterns of fraud and abuse, then returns risk scores that help you decide whether to allow a transaction, flag it for review, or block it. For proxy and VPN detection specifically, IPQualityScore is one of the more comprehensive options available, built on proprietary intelligence gathered from thousands of honeypots and insights from business customers processing over 100 million transactions daily.

The platform's primary use case is fraud prevention for online businesses. E-commerce sites use it to catch account takeovers and fraudulent purchases. Lending platforms use it to spot synthetic identity fraud. Gaming companies use it to detect bot networks. SaaS platforms use it to prevent signup fraud. In all these contexts, proxy and VPN detection is critical because bad actors use proxies to mask their location, make multiple accounts from the same person appear to come from different places, or bypass geographic restrictions and rate limiting. IPQualityScore detects these connections as part of a broader risk assessment, flagging users on proxies, Tor networks, or VPNs for additional scrutiny. The platform monitors over 50 million active botnets and maintains a database built from signals across 3,500 business customers, making it one of the most data-rich IP intelligence services available.

IPQualityScore offers several distinct modules, each addressing a different angle of fraud. The Proxy and IP Intelligence API identifies VPNs and Tor exit nodes, provides geolocation data, checks whether an IP is associated with botnets or residential proxies, and scores the overall threat level of an IP address. Results include geolocation accuracy (country, city, latitude/longitude), ISP and carrier information, proxy type detection (datacenter, residential, mobile, VPN, Tor), and a risk score from 0 to 100. The Email Verification API validates whether an email address exists, checks for disposable or temporary email services, assesses deliverability and reputation, and detects role-based addresses. The Phone Number Validation API verifies whether a phone number is valid, identifies VoIP services, checks carrier information, and scores fraud risk. The Device Fingerprinting module identifies bots, emulators, and location spoofing on both web and mobile platforms, building a profile of the device's behavior and trustworthiness.

The platform also includes cyber threat scanning tools that check for malware in URLs, scan for phishing content, and monitor the dark web for leaked credentials. This broader security context is useful if you're running your own services and want to understand not just whether an IP is suspicious, but whether a URL in a submission is hosting malware or a user's email has appeared in a public breach. The identity verification module detects synthetic fraud (fake identities built to commit fraud) and digital impersonation attempts, cross-referencing data across multiple signals to catch coordinated abuse.

Access to IPQualityScore is entirely API-based. There is no web dashboard for doing one-off checks. You integrate the API into your application or backend, sending requests for IP reputation, email validation, phone verification, or device fingerprinting, and receiving structured JSON responses. The API supports both synchronous and asynchronous calls, rate limiting, batching, and webhooks for high-volume use cases. Documentation is thorough, with code examples in multiple languages, clear descriptions of each parameter, and detailed explanations of the response fields and risk scores.

Pricing is quota-based, with different tiers offering different numbers of API calls per month. The platform publishes some pricing tiers on their site, but the exact rates depend on your volume and which modules you use. For high-volume use cases or multiple modules together, they offer custom enterprise pricing. A typical small business might pay anywhere from a few hundred to a few thousand dollars per month depending on traffic. If you're running a small site with minimal signup fraud risk, the cost might not justify the investment, but if you're an e-commerce, lending, or gaming platform handling thousands of users daily, IPQualityScore's comprehensive data and detection accuracy often pay for themselves by preventing fraud losses.

The platform is industry-standard among fraud prevention teams. Banks, financial platforms, and major e-commerce sites use IPQualityScore alongside or instead of other fraud detection services because of the depth of their data. A business running the IPQualityScore IP reputation check on every login attempt, combined with email verification on every signup, catches most account takeover and signup fraud attempts before they succeed. The combination of real-time decision-making and dark-web monitoring for leaked credentials is particularly valuable for any platform that stores user data worth breaching.

One important limitation to understand is that IPQualityScore is a decision-support tool, not a silver bullet. A user on a residential proxy might be legitimate, simply using a VPN for privacy. A user on a datacenter IP might be a bot. The scores and flags IPQualityScore provides should inform your decision-making, not replace human judgment or additional verification. For high-risk transactions, many platforms combine IPQualityScore with a secondary verification step, like a phone or email confirmation, before fully trusting the user. The more layers of verification you stack, the more confident your fraud prevention becomes.

The quality of the API responses is high. When IPQualityScore reports that an IP is a known datacenter proxy, that IP is almost certainly a proxy. When it reports a risk score of 85 out of 100, that usually correlates with genuine fraud attempts in the customer data. The platform's accuracy comes from their scale of data and the constant feedback from customers who report whether a flagged transaction was actually fraudulent. This loop of testing and refinement keeps their detection accurate as fraudsters evolve their tactics.

For teams running their own infrastructure or managing fraud prevention, IPQualityScore is a mature, data-rich tool that fits into your decision-making pipeline. The API integration is straightforward, the documentation is good, and the data quality is reliable. If proxy and VPN detection is a critical part of your fraud strategy, IPQualityScore will give you one of the most comprehensive and accurate assessments available. The cost is reasonable for businesses whose fraud losses would exceed their subscription fee.