What Is a Penetration Test?

The Core Definition

A penetration test, often called a pentest or ethical hack, is a controlled, authorized simulation of a cyberattack. A team of certified security engineers uses the same tools, techniques, and tactics that real-world attackers use to probe your network, applications, or personnel for exploitable weaknesses. The goal is simple: find the vulnerabilities before an attacker does, understand how they could be exploited, and provide a clear roadmap for fixing them.

What Makes It Different From a Security Audit?

A security audit reviews policies, procedures, and configurations against a standard or framework. A penetration test is active, engineers actually attempt to exploit discovered weaknesses. Auditing your locks is different from hiring a locksmith to try to pick them. Both have value, but only one tells you whether your locks actually hold.

What Does a Pentest Actually Involve?

A professional penetration test follows a structured testing methodology. At Grid32, that process includes: Reconnaissance, Scanning and Enumeration, Vulnerability Mapping, Exploitation and Privilege Escalation, and Reporting with a full remediation roadmap.

Types of Penetration Tests

• External network penetration testing, attacking from the internet
• Internal network penetration testing, simulating an insider or post-breach attacker
• Wireless penetration testing, assessing Wi-Fi infrastructure
• Web application penetration testing, attacking web apps, APIs, and portals
• Social engineering and phishing, testing your human layer

How Is a Pentest Different From a Vulnerability Assessment?

A vulnerability assessment scans your environment and produces a list of potential issues. A penetration test goes further, attempting to exploit those issues to determine whether they represent genuine, actionable risk.

What Do You Receive at the End?

The deliverable is a tiered report: an executive summary written for boards and auditors, detailed technical findings with severity rankings and step-by-step remediation guidance, and attestation documentation you can share with clients, auditors, and insurers. Findings are ranked from Critical to Low, and defensive controls that performed well during testing are credited alongside the vulnerabilities. Our guide to what a pentest report includes walks through each section.

How Much Does a Penetration Test Cost?

Grid32 publishes its prices, which is rare in this industry. Network penetration tests start at $3,995, web application assessments at $4,995, and social engineering campaigns at $2,195, with final pricing set by the size of your environment. The complete schedule, and what drives cost up or down, is in our pricing guide.

How Long Does a Penetration Test Take?

Most engagements run one to three weeks from kickoff to report delivery depending on scope, with testing itself typically taking several days of dedicated senior engineering time. Details by engagement type are in our timeline guide.

Will Testing Disrupt Our Operations?

Performed properly, no. Grid32 has completed 2,500+ engagements without a single unintended service disruption. Testing methodology is engineered around operational safety, and anything with elevated risk is coordinated with your team in advance. More in is penetration testing safe?