Red Team vs Blue Team vs Purple Team: Which Does Your Organization Need

Red team, blue team, purple team - these are terms everyone uses in cybersecurity now. But in practice, confusion reigns. I have seen companies order a "red team engagement" when they needed a pentest, and internal teams calling themselves "blue team" when they were really just doing passive monitoring without response capabilities. Clarifying the differences is crucial for investing wisely.

Red Team: the simulated attacker

A red team simulates a real adversary. It does not just test technical vulnerabilities - it attempts to achieve specific objectives (access to customer data, domain controller compromise, intellectual property exfiltration) using any vector: technical exploits, social engineering, physical access. A true red team engagement lasts weeks, not days, and tests the organization's entire defensive chain.

Blue Team: active defense

The blue team is who defends. But having a SIEM running is not enough - an effective blue team does proactive detection, threat hunting, incident response, and continuous improvement of defenses. When I built Presidio, I designed it as a blue team tool: automated detection, response playbooks, integrated case management. But the tool without the right people and processes is not enough.

Purple Team: the best of both

A purple team is not a separate third team - it is a collaborative approach where red and blue work together. The attacker executes specific techniques (mapped to MITRE ATT&CK), the defender verifies if they detect them, and together they improve detections. In my experience, purple teaming is the most efficient approach for SMEs: it costs less than a full red team engagement and produces immediate, measurable improvements in detection capabilities.

My advice: if you are an SME with a limited budget, start with purple team. You get the value of offensive testing combined with immediate defense improvement. If you already have a mature blue team and want to test your overall resilience, then a red team engagement makes sense. The key is choosing based on your organization's maturity, not based on which term sounds more impressive.