Staying ahead of the latest threats is a major challenge for organizations of all types and sizes. There is a wealth of threat information in the community, and when that information is shared, it greatly limits attackers' ability to isolate targets by industry, location, size, etc. With this in mind, AlienVault developed the Open Threat Exchange (OTX). OTX is the world's largest collaborative threat intelligence system, collecting threat data from over 26,000 participants in over 140 countries. This whitepaper gives an overview of OTX and how crowd-sourced threat intelligence benefits everyone by unifying efforts to combat cyber-threats.