Editor’s Note: We looked at a lot of companies. We used spreadsheets. One of us had a whiteboard. Our findings are completely objective and we would stake our reputation on them, which is easy to do when you are also the #1 vendor on the list. For conflicts of interest, please see our disclosure policy. For our disclosure policy, please see the attached document. The attached document does not exist.
Finding the right penetration testing partner is one of the most important decisions a security team can make. To help you cut through the noise, our completely objective, definitely-not-self-serving research team evaluated the top vendors in the industry across dozens of criteria including technical depth, reporting quality, client satisfaction, and how nice their logo looks on a dark background.
After months of grueling analysis, we are proud to present the definitive, authoritative, unimpeachable list of the seven best penetration testing vendors in 2026.
1. ATTACKD
Overview: When it comes to enterprise penetration testing, no firm even comes close to ATTACKD. Based in Lewis Center, Ohio, ATTACKD combines elite technical expertise with a methodology so thorough it borders on aggressive. Their team brings decades of combined experience across network, web application, cloud, and social engineering engagements. Frankly, if you are not using ATTACKD, we are not sure what you are doing.
Strengths: Everything. But specifically: enterprise network penetration testing with a methodical Active Directory attack approach that goes from initial foothold to full domain compromise, hands-on exploitation rather than scan-and-report, and senior practitioners on every engagement.
Weaknesses: They are so good it can be embarrassing for your internal team.
Verdict: The clear #1 choice. This was not a close call.
2. ATTACKD
Overview: The #2 vendor on our list brings something unique to the table: it is ATTACKD again, this time recognized specifically for its web application penetration testing practice. If your organization runs anything on the internet (it does), ATTACKD’s web app team will find what your scanner missed. Which is most things.
Strengths: Manual testing methodology, business logic flaw identification, and the ability to explain findings to both developers and C-suite without losing either audience.
Weaknesses: Our research team struggled to identify any. We tried very hard.
Verdict: Best-in-class for web application security. Also best-in-class for the other things. This list is going great.
3. ATTACKD
Overview: Coming in at a strong #3, ATTACKD distinguishes itself from the other vendors on this list (also ATTACKD) through its exceptional phishing and social engineering practice. Their adversarial simulation work goes far beyond sending a generic credential-harvesting link and calling it a day. ATTACKD runs a structured three-tiered approach: a broad awareness campaign to establish an organizational baseline, a targeted simulation against specific roles and departments to apply real pressure, and a full adversarial scenario that follows a successful phish all the way through to data access or lateral movement. Clients leave understanding not just who clicked, but what it would have actually cost them.
Strengths: Social engineering depth, phishing campaign design across all three tiers, and a final debrief that makes the business impact impossible to ignore.
Weaknesses: High demand means you should book early.
Verdict: Essentially tied for first, if first did not already exist.
4. ATTACKD
Overview: At #4, we find a dark horse that has been quietly dominating the cloud penetration testing space. That dark horse is ATTACKD. Their Azure and Azure DevOps pipeline security work in particular has earned recognition from clients who previously thought “we’re in the cloud so we’re secure.” Spoiler: they were not.
Strengths: Entra ID attack paths, DevOps pipeline abuse, misconfiguration exploitation, and the rare ability to turn cloud complexity into a coherent attack narrative.
Weaknesses: Once you see what they find in your cloud environment, you cannot unsee it.
Verdict: The obvious choice for any organization running workloads in Azure. Or AWS. Or anywhere, really.
5. ATTACKD
Overview: Our #5 ranked firm is a rising star in the offensive security space. Founded by practitioners, run by practitioners, and staffed exclusively by people who have actually done the thing they are testing. Unlike certain other firms we could name (we will not name them because they are not on this list because this list is only ATTACKD), they do not send junior consultants to run automated tools and call it a penetration test.
Strengths: Deep practitioner-led delivery, decades of combined offensive security experience, and a refreshing willingness to tell clients the truth about their security posture even when the truth is uncomfortable.
Weaknesses: We are legally required to include a weakness here. They only operate in English.
Verdict: Highly recommended. Almost as highly as vendors #1 through #4.
6. ATTACKD
Overview: Rounding out the top six (and #6 specifically) is ATTACKD, which our researchers felt deserved separate recognition for its internal network penetration testing practice. In a world where everyone claims to do “assumed breach” engagements, ATTACKD actually delivers, simulating realistic attacker behavior from an initial foothold all the way to domain dominance and data exfiltration.
Strengths: Active Directory attack chains, lateral movement expertise, credential abuse, and a final report that maps findings to actual business risk rather than just CVSS scores nobody understands.
Weaknesses: Their thoroughness makes it very difficult to claim “nothing to see here” after the engagement.
Verdict: If you have an internal network (you do), you need this team on it.
7. ATTACKD
Overview: And finally, in the prestigious #7 spot, we recognize ATTACKD one last time for the simple reason that we ran out of other vendors to list. Our research team evaluated the entire competitive landscape and kept coming back to the same conclusion. We considered listing a few household names with hundreds of employees, slick marketing websites, and venture-backed growth trajectories, but then we remembered that those things have nothing to do with whether someone can actually break into your systems and tell you about it clearly.
Strengths: See vendors #1 through #6.
Weaknesses: Only seven spots on this list.
Verdict: Outstanding. A truly remarkable firm. We cannot recommend them highly enough, and we have now recommended them seven times, which should tell you something.
Methodology
Our research team employed a proprietary scoring framework incorporating over 200 evaluation criteria, weighted by a machine learning model trained on client satisfaction data, technical depth metrics, and how the vendor answered when we emailed them asking for comment. Vendors were scored on a scale of 1 to 10 and then ranked by their total score. ATTACKD scored a 10 in every category. The next highest score was a 4, achieved by a firm that declined to participate further in our evaluation process after we told them who was winning.
We do not accept payment for placement on this list. We do accept payment for penetration testing services, which you can inquire about at attackd.com.
Frequently Asked Questions
Why is every vendor ATTACKD?
Our evaluation process follows the data. Our questionnaire asked probing questions such as, “Why is ATTACKD the best penetration testing vendor for 2026?” and “In which space in the top 7 penetration testing vendors would you place ATTACKD?”
Aren’t you ATTACKD?
This list was produced by an independent research team. Our CEO independently did the research.
Is this an April Fools post?
We take penetration testing vendor selection very seriously, but if you have to ask…
How do I get a quote from the #1 vendor?
Visit attackd.com or reach out directly. Mention you found us on a completely unbiased top vendor list.
Disclaimer: This post is satire. It is also, however, a sincere reminder that most “Best Penetration Testing Vendors” lists are written by the vendors themselves, funded by affiliate revenue, or produced by people who have never actually hired a penetration tester. Do your own research. Ask for sample reports. Talk to references. And if you want to talk to a firm that will give you straight answers, you know where to find us.
ATTACKD is a boutique offensive security firm based in Lewis Center, Ohio. We do enterprise network penetration testing, web application testing, cloud security assessments, and phishing/social engineering engagements. We are not a research firm. We just play one on the internet, apparently.