Purple teaming is a collaborative security exercise that brings offensive (Red Team) and defensive (Blue Team) operators together rather than running them separately. Instead of testing in isolation, the two teams work side by side to test specific attack techniques, observe how those techniques appear in logs and alerts, and improve detection and response in real time. The goal is not just to find vulnerabilities but to strengthen how an organization's people, processes, and technology respond to a live threat.

The red team simulates an adversary attacking your organization, often covertly and without the defensive team's knowledge. The blue team refers to the defensive side, the people and processes responsible for detecting and responding to threats. Purple teaming is an exercise that brings both together in a single collaborative engagement, where Red and Blue work side by side to test techniques and immediately evaluate whether the Blue team can detect and respond to them. The distinction is collaboration versus separation. Red and Blue operate independently, while Purple is built around shared visibility and real-time feedback to rapidly implement defensive process improvements.

The right choice depends on what you're trying to learn. Red teaming is the better fit if your goal is to find out whether a real, stealthy attacker could reach a specific objective without being detected, or can bypass controls. Purple teaming is the better fit if your team already has detection and response capabilities in place and you want to actively test and improve them in real time, with Red and Blue working together rather than Red operating covertly. Many organizations start with penetration testing to identify gaps, then move to purple teaming once they want to validate that their defensive improvements actually work, as well as fine tune detections. Typically a "Red Team" is the final step, where the blue team isn't notified of a test with the goal to determine the effectiveness of the integration of all of their controls.
 

A purple team engagement typically starts with scoping conversations to understand top assets, network structure, and areas the organization wants to improve. From there, Red and Blue teams establish initial access and map possible threats to the MITRE ATT&CK framework to finalize which tactics, techniques, and procedures will be tested. The teams then collaborate to execute those techniques while monitoring how the Blue team's logs and alerts respond, asking whether the behavior was detected and what the response looked like. The engagement closes with a report covering defensive strengths, tested techniques, and recommendations for improving detection and response.

Most organizations benefit from running purple team exercises on an annual or semi-annual basis, with additional engagements after major infrastructure changes, new tool deployments, or significant shifts in the threat landscape relevant to their industry. Because purple teaming is meant to validate and improve detection over time, running it as a one-time exercise limits its value. Organizations that treat it as a recurring program tend to see the clearest gains in their Blue team's response capability.

A typical purple team engagement runs anywhere from one to three weeks, depending on the number of tactics, techniques, and procedures being tested and the complexity of the environment. The Plan phase, including scoping conversations and threat mapping, usually takes the least time, while the Collaborate phase, where Red and Blue actively test and observe detection in real time, makes up the bulk of the engagement. Timelines can extend for larger environments or when testing a broader set of TTPs.

Purple team engagements are built around the MITRE ATT&CK framework, which is used to map potential threats and finalize which tactics, techniques, and procedures will be tested. Beyond the framework itself, tooling focuses on visibility, the same logging and alerting systems your Blue team already uses to detect threats. The goal is to evaluate whether existing detection tools catch each tested technique, not to introduce new tools, since the exercise is meant to validate and improve what's already in place. On the Red team side, typically attacks are run multiple times through various methods to test controls. Initial access may be gained or granted through hardware or software implant, and TTPs are tested via stealthier C2 methods such as DLL Sideloaded beacons, and through more overt network accessed devices (such as a laptop with a spoofed MAC address). The idea is to validate controls across a broad range of TTPs and fine tune the associated detections.

A vulnerability assessment identifies known weaknesses across an environment. A penetration test goes further, actively exploiting those weaknesses to validate real risk. Purple teaming is different from both because it is not primarily about finding vulnerabilities. It's a collaborative exercise where Red and Blue teams work together to test specific techniques and improve how well the organization detects and responds to them in real time. The output of a purple team engagement is less about a list of vulnerabilities and more about measurable improvement in detection and response capability.