MaxMind has a full-featured option with real-time risk scoring and details to help you spot fraud. It offers noninvasive location data for IP geolocation and can spot and block unauthorized access from VPNs, proxy servers and anonymizers with its proxy detection. MaxMind is a widely used option for companies large and small, covering 99.9999% of IP addresses and with a 99.99% web service uptime for nine years.
Another serious option is Ipregistry, which offers a full suite of IP Geolocation and Threat Intelligence. That includes data on more than 3 million unique locations and threat intelligence from more than 220 OSINT threat feeds, proxy and VPN detection. Ipregistry offers easy integration with a refined JSON and XML API, making it a good option for everything from publishers to financial services.
ipdata also offers a serious IP Geolocation API that includes geolocation data, threat intelligence feeds and proxy and VPN detection. It can be used to localize content, prevent fraud, enforce geographic restrictions and protect against spam and abuse. The service is available in several pricing tiers, including a free tier, and is designed for high availability and uptime with an average latency of 60ms globally.
For a more sophisticated fraud detection service, IPQS offers real-time insights through sophisticated algorithms that examine more than 300 data points. It can spot recent abuse, active VPN and Tor connections, bot activity and offers options for email verification, phone validation and URL scanning. IPQS integrates with popular sales and marketing tools like Hubspot and Salesforce and offers flexible pricing plans, including a free tier.