Kaspersky Lab (pronounced /kæsˈpɝski læb/) is a computer security company, co-founded by Natalia Kasperskaya and Eugene Kaspersky in 1997, offering antivirus, anti-spyware, anti-spam, and anti-intrusion products. Kaspersky Lab is a privately held company headquartered in Moscow, Russia with regional offices in Germany, France, the Netherlands, the UK, Poland, Romania, Sweden, Japan, China, Korea and the USA.

In 2005, Red Herring magazine listed Kaspersky among "Red Herring 100 Europe", a selection of the 100 private companies in Europe and Israel that play a leading role in innovation and technology.

Kaspersky Anti-Virus engine also powers products or solutions by other security vendors, such as Check Point, Bluecoat, Juniper Networks, Sybari (now acquired by Microsoft), Netintelligence, GFI Software, F-Secure, Borderware, FrontBridge, G-Data, Netasq, and others. Altogether, more than 120 companies are licensing technology from Kaspersky, which makes it one of the most widely used antivirus engines in the industry.