Been using IPQualityScore.com for 5… Been using IPQualityScore.com for 5 years on our network of sites and the service has been absolutely FANTASTIC! Couldn't recommend a better proxy checking service. They are the best in the world by FAR!

Professionals I had to deal with them as my personal IPv4 address kept on being blacklisted by their services. It was quite difficult to get in touch with their support, hence only 4 stars. As soon as I got in touch with them they were willing to assist and help in solving the issue. We are now actively exchanging emails on how to solve the issue and to understand what is causing this blacklisting as they want to improve the quality of their data.

A blatantly false classification I had my home IP address falsely classified as "high risk", a "VPN" and a "spammer" and as a consequence had my registration for a web site cancelled, and had the administrator of that web site call me a "liar". I have since had an extended email correspondence with the Technical Director of IPQS who has provided no data whatsoever to justify the "VPN" and "spammer" classifications, and for the "high risk" classifications has provided a port scan (which does NOT match an independent port scan) and a browser profile (which matches my own PC but falsely claims I have bad-actor extensions installed), and has somehow extrapolated what are at best (even if the data was correct) mild indications of an untypical home user into a "high risk" user, a "VPN" and a "spammer". In short, their methodology apparently said (based on the flimsiest of evidence) that my usage looked vaguely like that of bad-actors, and thus I must be one too. This is akin to saying that someone is a thief based on the shape of their ears or the bumps on their head. Based entirely on this mis-classification, I then had my registration for a web-site cancelled, and the administrator of that web site explicitly called me "a liar". In short, my internet usage and reputation were both harmed by a false classification by this company of my internet usage as "high risk", a "VPN" and a "spammer". BE WARNED - since their classification is apparently based on extrapolation rather than any proof that will stand up in a court of law, you run the risk of being sued if you use their data to prevent someone using your services in any way shape or form that impugns their reputation. Note: IPQS response to this review is to deny my email domain name exists. That is the level of their technical inabilities.

IPQS Fraud Intelligence is best solutions IPQS offers many features that help my business protect itself from fraud activites on the internet. I use IPQS for email validation so that it can quickly browse through my email addresses for legitimacy and recognize suspicious email addresses, which are frequently utilized for fraudulent purposes. Also, it can recognize when a client is interfacing with a site through an intermediary, which can be an indication of dubious action. Their API interface reaction time is very fast, and the data is accurate and reliable. I've been using IPQS for few months now and I can say that it's one of the best fraud detection solutions in the market

Ruins legitimate website traffic Their VPN/proxy detection data service is very draconian and leads to many false positives that ultimately degrade the service experience of many clients I have worked with, who have had their users' residential and cellular IP addresses falsely assigned a high fraud risk. I myself have had several instances where I have been blocked by sites using data from IPQS despite using low risk corporate or residential IPs, needless to say causing endless headache. I would not recommend using this company for proxy detection unless you are looking to alienate legitimate website visitors. Additionally, they are not very receptive to requests to unblock IP addresses and seemingly have an arbitrary and secretive process by which they assign fraud scores.