Penetration testing that finds weaknesses before attackers do
Winmill pairs AI-driven testing with senior human testers to simulate real-world attacks across your systems, applications, and people, giving you clear visibility into your vulnerabilities, your true risk exposure, and the issues that need attention.
Continuous, scalable security testing
Modern cyber threats evolve too quickly for annual or one-time penetration testing to be enough. The Penetration Testing Stream is Winmill’s continuous testing program, built for organizations that need ongoing visibility into their security posture rather than a point-in-time snapshot.
A subscription gives you recurring, targeted penetration testing aligned to your environment, technology stack, and risk profile. Our security engineers deliver prioritized findings, remediation guidance, and ongoing collaboration, so vulnerabilities are identified and addressed before attackers can exploit them.
The Penetration Testing Stream is ideal for teams that want
- Continuous coverage instead of yearly penetration testing.
- Faster validation after code releases or infrastructure changes.
- A predictable cost structure for recurring security testing.
- A partnership with experienced penetration testers who learn your environment over time.
Tested with AI, verified by humans
Modern attack surfaces are too large for manual testing alone. Winmill incorporates AI throughout the Penetration Testing Stream to expand the breadth and depth of every engagement, and every finding is validated by senior testers before it reaches your report.
Broader coverage
AI-assisted reconnaissance and scanning explore more of your attack surface, so endpoints, integrations, and edge cases that manual testing would miss still get examined.
Deeper testing
AI-generated attack variations probe authentication, business logic, and APIs with far more permutations than human hours alone could cover.
Verified by humans
Every AI-surfaced finding is manually validated and proven by our senior testers. Your report contains real, exploitable issues, not false-positive noise.
What penetration testing does for you
A complete view of vulnerabilities
You receive a prioritized list of issues, based on the exploitability and impact of each finding using an industry-standard ranking process.
Regulatory compliance
Detailed reports help you avoid fines for non-compliance and demonstrate due diligence to auditors by maintaining required security controls.
Avoiding the cost of system downtime
Our team provides specific guidance and recommendations to avoid financial pitfalls by identifying and addressing risks before attacks or security breaches occur.
Ensuring the stability of new assets
For organizations that rapidly develop and adopt new applications and infrastructure, regular testing gives stakeholders confidence that new assets and upgrades are not introducing new security flaws.
Why enterprises choose Winmill as their testing partner
Extensive knowledge and experience
Our team has deep experience in penetration testing of external and internal networks, web applications, application infrastructure, and APIs, along with social engineering attacks such as physical security and phishing campaigns. We have tested for companies in healthcare, financial services, telecom, energy, and other industries.
High-quality reports
Penetration assessments are always peer-reviewed and edited by professional technical writers before delivery. In addition to comprehensive technical detail, we provide condensed information security summaries for executive and senior management.
Valuable, actionable insights
Our assessments provide actionable insight into discovered vulnerabilities, potential attack paths, the business impact of breaches, and remediation steps, so stakeholders can quickly digest what matters and act on it.
Certified, research-driven testers
To stay one step ahead of attackers, each of our team members devotes over 400 hours per year to research and the security community: publishing articles, participating in conferences, developing custom testing tools, and writing new exploit code.
Penetration testing success stories
Labor union secures member portal with Winmill’s Penetration Testing Stream
Critical vulnerabilities eliminated ahead of the member portal expansion, with immediate clarity into security posture.
Read the storyPenetration testing for a national sports league
Manual testing on the league release cadence caught high-risk issues that automated scanners had missed.
Read the storyWinmill assists hybrid cloud management developer with cybersecurity services
DAST scanning and a structured remediation workflow built into every release of the platform.
Read the storyWinmill delivered comprehensive, high-quality penetration tests that exceeded our expectations. Their expertise and guidance made a measurable impact on our security.
Frequently asked questions
What does a Winmill penetration test include?
Every engagement includes an executive summary report, a full technical report, a remediation action plan, and a retest to validate remediation. We include technical details with enough information to reproduce our findings, and every engagement comes with a complimentary readout call.
What systems can Winmill test?
We test web applications, mobile apps, IoT devices, network and cloud infrastructure, and AI systems. Our team is also experienced in social engineering attacks such as physical security testing and phishing campaigns.
What is the Penetration Testing Stream?
The Penetration Testing Stream is Winmill’s continuous testing program. A subscription gives you recurring, targeted penetration testing aligned to your environment, technology stack, and risk profile, instead of a point-in-time snapshot once a year.
What certifications does the Winmill team hold?
Our team members have earned industry certifications including GPEN, GWAPT, OSCP, OSCE, CEH, PMP, CISA, and CISSP. Each team member devotes over 400 hours per year to security research and community contributions.
How does Winmill use AI in penetration testing?
We use AI throughout our testing to expand coverage and depth. AI-assisted reconnaissance explores more of the attack surface, and AI-generated attack variations probe deeper than manual testing alone. Every finding is then validated by our senior testers before it reaches your report. We also test AI systems themselves, from adversarial inputs to data poisoning.
Interested in starting a project with our pen testing experts?
Tell us what you’re working on and we’ll connect you with the right team.