DDoS-Guard is a Russian Internet infrastructure company which provides DDoS protection and web hosting services. Researchers and journalists have alleged that many of DDoS-Guard's clients are engaged in criminal activity, and investigative reporter Brian Krebs reported in January 2021 that a "vast number" of the websites hosted by DDoS-Guard are "phishing sites and domains tied to cybercrime services or forums online". Some of DDoS-Guard's notable clients have included American alt-tech social network Parler, and various groups associated with the Russian government.