JsonWHOISAPI is described as 'With over 1.5K new gTLDs created so far and more on the horizon the days of everyone rolling their own WHOIS data parser are over'. There are more than 10 alternatives to JsonWHOISAPI for a variety of platforms, including Online / Web-based, Windows, Linux, Mac and Android. The best alternative is DomainTools, which is free. Other great apps like JsonWHOISAPI are JsonWhois.io (Freemium), WebCargo (Paid), WhoisAPI (Freemium) and CubDomain (Free).
SmartWhois is a useful network information utility that allows you to look up all the available information about an IP address, hostname or domain, including country, state or province, city, name of the network provider, administrator and technical support contact information.
JsonWHOIS’s WHOIS Database Download is useful for fraud investigators who want to dig deeper into suspected misuse of trademarks and intellectual property infringement. With the database, they can quickly obtain a domain’s ownership information.