Zero Day Plus is a UK-based cybersecurity company that offers Abatis Host Integrity Technology (HIT) to help organizations enhance their security. Abatis HIT is a disruptive solution that uses proven protection to secure all endpoints against unwanted code, as tested by organizations like BAE Systems, Lockheed Martin, and ATOS. It prevents both external and internal threats from persisting on endpoints, covering systems from Windows NT4 to modern versions of Windows and Linux. The solution can also protect legacy systems longer, has no performance impact or user impact, and initially operates in learn mode to allow organizations to understand their environment better before enforcing policies.