Compare penetration testing, red team exercises, and purple teaming. Learn which question each answers, what to buy, and what evidence a provider can deliver.
You asked for a red team exercise. The proposal offers a vulnerability scan, a week of testing, and a red-covered report. Close enough for procurement. Less helpful for the question you were trying to answer.
The confusion is understandable. A pentester and a red team operator might both send a phishing message or exploit an application flaw. Watching that one action won’t tell you which engagement you’re buying. You need to know what the tester is trying to establish and what they’ll hand over when the work ends.
The distinction comes down to purpose: a penetration test validates exploitable weaknesses in an agreed scope. A red team exercise tests whether an authorized adversary can reach a business objective and how the organization responds. Purple teaming brings offensive and defensive practitioners together to improve and retest specific defenses.
Ask the provider what you’ll be able to decide afterward. A service name that can’t help answer that question isn’t doing you much good.
The clearest comparison starts with the primary question and expected output. Disclosure and specific techniques can vary, so confirm those details in the statement of work.
Exercise | Primary question | Defender participation | Priority evidence |
Penetration test | Which scoped weaknesses can be exploited? | Awareness varies; response testing is optional. | Validated findings, impact, fixes, and retest results. |
Red team exercise | Can an adversary reach the agreed objective? | Often unaware, with an authorized oversight group. | Attack path, defensive response, and points of interruption. |
Purple teaming | Can we improve a specific defense? | Selected practitioners collaborate; disclosure varies. | Observed a gap, implemented a change, and retested before and after. |
Don’t identify the service by its duration or by whether phishing is included. Check the objective and the promised report. Two providers can use similar techniques for several weeks and still answer very different questions.
A pentest asks whether weaknesses in a defined application, system, or environment can be exploited, and what that exploitation would allow. The result helps teams prioritize and verify technical remediation.
For example, a customer portal test might examine whether one user can access another user’s records. The tester documents the authorization weakness, demonstrates impact within agreed limits, and explains how the team can fix and retest it.
NIST’s penetration testing definitions (opens in new tab) describe attempts to get around security features under agreed constraints. A scan can help identify candidates for testing, but you still need to investigate its results. Ask the tester to show which weaknesses were exploitable, what access they allowed, and how the finding was checked.
Ask for enough detail to reproduce and resolve the findings:
A pentest can be performed with different levels of prior information and defender awareness. Giving testers source code doesn’t make the work less useful if the objective is to find meaningful application flaws efficiently.
A clean pentest report doesn’t tell you whether the SOC would recognize an intrusion. Detection and response have to be part of the agreed work for the test to say much about them. Otherwise, the team may fix a real vulnerability without ever observing a defender’s reaction to its exploitation.
A red team exercise asks whether an authorized adversary can achieve an agreed objective by combining permitted techniques. It assesses attack paths and the organization’s ability to recognize and interrupt them.
The objective could be access to a sensitive business system or a safe demonstration of how an intruder could reach regulated data. The exercise might combine external reconnaissance, social engineering, identity misuse, application weaknesses, and movement across systems. The scope determines which of those are allowed.
NIST’s red team/blue team description (opens in new tab) covers both the impact an adversary could achieve and the defenses that worked. Ask the provider to document both. A team that stopped an attempted path has something to preserve and retest, even if the attacker later found another way through.
Many red team exercises keep responding defenders unaware so the organization can observe an unaided response. A smaller group knows the plan, authorizes the activity, handles deconfliction, and can stop the exercise.
An engagement can also begin from an assumed compromise so testers can examine what happens after initial access. That can save time when the concern is access to a particular business system. Agree on the starting conditions and disclosure rules, because they affect what you can conclude from the result.
The deliverable should explain the attack path, defensive observations, business consequence, and opportunities to interrupt the sequence. A list of vulnerabilities alone won’t show why one weakness became a route to the objective.
For human-layer red teaming, the attempt might focus on getting a helpdesk reset or a payment exception approved. That’s a legitimate testing objective. The proposal should say which people and procedures it covers, so the buyer doesn’t assume it also includes technical access testing elsewhere in the environment.
Purple teaming uses collaboration to improve a defense against relevant adversary behavior. Offensive operators execute a technique or scenario, defensive practitioners inspect the evidence, and the team changes and retests the control or process.
The defenders can check the response step by step: did the activity produce a log, did a rule turn it into an alert, and did someone act? When a step fails, the operator and defender can repeat the relevant behavior while the team works out why.
MITRE ATT&CK (opens in new tab) can provide a shared vocabulary for the behavior. It doesn’t replace the test objective or turn a complete-looking matrix into proof of coverage.
Teams often share techniques in advance to speed up detection engineering. Other designs use selected observers while preserving surprise for responding analysts. The right arrangement depends on the question.
Walmart’s trusted-agent approach (opens in new tab), described by its security operations leadership, illustrates that middle ground: selected blue-team members observe red-team activity without warning their wider defensive colleagues.
Ask to see what the team changed and what happened on retest. The report should identify the control or procedure, its owner, and the conditions under which it was checked. A debrief that ends with recommendations alone leaves you paying for the discovery without knowing whether the fix worked.
Consider a company worried about attackers gaining access through its employee support process. The same business concern can produce three different engagements.
A pentest might focus on the support portal: whether authorization weaknesses expose tickets, whether account functions can be abused, and what technical flaws need remediation. It produces evidence about that defined system.
A red team exercise might attempt to reach a protected business resource through a permitted combination of impersonation, helpdesk interaction, and identity access. Responders may be unaware, allowing the company to observe whether its controls and escalation interrupt the path.
A purple teaming session might then replay a safe, agreed support-reset scenario with selected defenders and process owners. They check which signals appear, which decision permits the reset, and whether a revised verification process changes the outcome.
In this example, each engagement leaves a different job to do: fix the portal flaw, close the route to the protected resource, or improve the reset check. If you commission them together, ask for separate findings against each objective. That lets you judge whether each part of the work is complete.
Look at what the team is ready to act on. A newly released application may need focused testing before anyone knows which flaws to fix. An established SOC may already have detections it wants to challenge. Choose the engagement that can answer that immediate question and fund the work that follows.
Use these decision rules:
Phishing simulation can test how employees respond to controlled lures across channels. It doesn’t automatically test endpoint detection, lateral movement, or the entire incident response function. Calling every simulation a full red team exercise makes comparisons harder for everyone, including the buyer.
Resolve ambiguity before execution. “Comprehensive testing” sounds reassuring until two teams discover they had completely different ideas about what was included.
NIST’s technical testing and assessment guide (opens in new tab) covers test planning, findings review, and mitigation development. Use that planning work to settle the details of your own engagement. The tester and your team should agree on what is in scope, who can stop the activity, and what will happen after a finding is reported.
Ask the provider to answer six questions plainly:
Put the answers in the contract while everyone still agrees on what they mean. If a provider promises remediation, for example, establish whether that means writing a recommendation, changing a rule, or helping an engineer implement the fix. Those are different amounts of work.
Buyers don’t need to police every variation in terminology. They do need to recognize when the deliverable can’t answer the promised question.
Ask the provider to identify what it didn’t test, including excluded systems, unavailable users, and techniques it couldn’t run safely. A successful result applies to the conditions tested. The report should give the next team enough detail to decide whether those conditions still match the environment.
An excluded system is still excluded, however reassuring the executive summary sounds.
The sequence depends on what the first engagement finds. If a pentest exposes a support-portal flaw, fix and retest it before asking a red team to assess the wider access path. If a red team finds a missed detection, a focused purple teaming session can help improve and validate that response.
Give the next provider the affected asset, the attempted behavior, the test conditions, and the response observed. Include the technical detail behind the finding, not only the executive summary. Otherwise, the next engagement may spend time rediscovering a problem the first team already documented.
Doppel’s red teaming capabilities address the human part of that plan, such as a helpdesk reset or payment-approval conversation across email, voice, and messaging. Scope those interactions explicitly, then combine their results with the technical work you’ve commissioned.
Put retesting in the purchase plan. If one provider ends with a finding and another is expected to validate the fix, agree on the evidence and handoff before either engagement closes. Otherwise, the gap between them can become nobody’s job.
Use realistic workflow tests to connect those findings to business procedures: who verifies a reset, who approves an exception, and who receives a report. Those are named responsibilities the next exercise can check.
Before buying a pentest, red team exercise, or purple teaming engagement, finish this sentence: “After this work, we’ll know whether…” If the proposal can’t complete it clearly, the service name isn’t helping.
Leave room in the schedule for the work after the test: engineering changes, revised procedures, and another attempt to check them. If the report arrives on the last day of the budget period with nobody assigned to act, even a well-run engagement can end as a very expensive reading assignment.
Are resets and payment approvals part of your testing plan? Schedule a Doppel demo to explore social engineering scenarios for the teams handling those requests.
