Enigma Software Group USA, LLC is a privately held international systems integrator and developer of PC security software, with offices in the United States and the European Union. The company’s specialties are the development of PC security software, online security analysis, adaptive threat assessment, and detection of PC security threats, as well as malware custom fixes for its millions of subscribers worldwide. ESG is best known for SpyHunter, its anti-malware software product and service, and RegHunter, a program designed for PC optimization. SpyHunter 4 has repeatedly scored top grades in comparative testing by independent third-party testing labs such as AV-Comparatives and AV-TEST. SpyHunter 4 has also been certified by OPSWAT and TRUSTe.