Defence Intelligence (company)

Defence Intelligence, often referred to as Defintel, is an information security company based in Ottawa, Ontario, Canada. The company characterizes itself as offering services for "advanced compromise protection." Their marketing materials describe their services as being for the detection and prevention of compromised systems on a network, and include their Nemesis Compromise Protection (Nemesis) and Harbinger Compromise Assessment (Harbinger) services.

Defence Intelligence was the security company that discovered the Mariposa botnet in 2008, which consisted of 8 to 12 million individual zombie computers at the time of its dismantling in 2009.