# What are the best IP geolocation APIs for fraud detection and access control in SaaS applications?

<p class="elv-tracking-normal elv-text-default elv-font-figtree elv-text-base elv-leading-base elv-font-normal" elv="true">We're evaluating IP geolocation APIs for fraud detection and access control in a SaaS product, where a wrong call either lets in a bad actor or blocks a real user. What we're hoping to find:</p><ul>
<li>Reliable VPN, proxy, and anonymizer detection</li>
<li>Signals we can use for access rules and risk scoring</li>
<li>Accuracy good enough to avoid blocking legitimate users</li>
</ul><p class="elv-tracking-normal elv-text-default elv-font-figtree elv-text-base elv-leading-base elv-font-normal" elv="true">From the<a class="a a--md" elv="true" href="https://www.g2.com/categories/ip-address-intelligence"> </a><a class="a a--md" elv="true" href="https://www.g2.com/categories/ip-address-intelligence">IP address intelligence</a> category:</p><ul>
<li>
<a class="a a--md" elv="true" href="https://www.g2.com/products/ip2location/reviews"><strong>IP2Location</strong></a>: reviewers use it to block VPNs, proxies, Tor, and foreign IPs, with login and access auditing.</li>
<li>
<a class="a a--md" elv="true" href="https://www.g2.com/products/ipwhois-io/reviews"><strong>ipwhois.io</strong></a>: SOC and security reviewers use it for VPN detection and validating suspicious traffic.</li>
<li>
<a class="a a--md" elv="true" href="https://www.g2.com/products/ipregistry/reviews"><strong>Ipregistry</strong></a>: geolocation plus threat signals in one response, which reviewers credit with fewer login-system attacks.</li>
<li>
<a class="a a--md" elv="true" href="https://www.g2.com/products/ipstack/reviews"><strong>ipstack</strong></a>: used for IP-ban maps and location-based access control in production.</li>
</ul><p class="elv-tracking-normal elv-text-default elv-font-figtree elv-text-base elv-leading-base elv-font-normal" elv="true">For SaaS fraud and access control, which API gave you signals you could act on? And how did you avoid blocking real users behind VPNs or corporate proxies?</p>

##### Post Metadata
- Posted at: 22 days ago
- Author title: Marketer
- Net upvotes: 1


## Comments
### Comment 1

Honest heads-up first: G2 doesn&#39;t have a clean dedicated category for IP geolocation APIs, so I can&#39;t rank these from G2 reviews the way I would a normal category, I&#39;ll flag that I&#39;m going on established positioning here. The well-known providers for this use case are MaxMind (its GeoIP data is a longtime standard for fraud scoring), IPinfo and IP2Location for accurate geolocation and IP metadata, and providers like ipdata or ipregistry that bundle proxy, VPN and threat detection alongside location. For fraud detection and access control specifically, the feature that matters most isn&#39;t just city-level location, it&#39;s the anonymizer, proxy, VPN and hosting detection, since fraudsters mask their real location. So I&#39;d evaluate on accuracy plus that risk-signal layer, and test each against known-bad IPs. Are you using this mostly to geo-fence access, or to feed a fraud-scoring model? That changes which provider&#39;s data matters more.

##### Comment Metadata
- Posted at: 12 days ago





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