10 Best Red Teaming Companies for Advanced Attack Simulation in 2025

Red teaming companies are specialized cybersecurity firms that use a proactive, adversarial approach to test an organization’s defenses by simulating a real-world cyberattack.

Unlike traditional penetration testing, which typically focuses on finding specific vulnerabilities, red teaming emulates the tactics, techniques, and procedures (TTPs) of an advanced persistent threat (APT) actor.

The goal is to evaluate the effectiveness of an organization’s people, processes, and technology in detecting and responding to a sophisticated attack, often without the internal security team’s knowledge.

These firms employ highly skilled security professionals, often referred to as “ethical hackers,” who are experts in exploiting a wide range of security weaknesses.

Their engagements are designed to be comprehensive, targeting not just technical vulnerabilities but also the potential for social engineering, physical security breaches, and other non-technical attack vectors.

By thinking and acting like real adversaries, red teamers can provide an organization with a realistic and ...