Penetration Testing  ·  Established 2014

Do one thing. Do it well.

For over a decade, Rarefied has helped more than a thousand teams eliminate tens of thousands of vulnerabilities — by focusing on one discipline, exclusively: the penetration test.

Request an assessment Explore our methodology  →
11,000+
Vulnerabilities eliminated
1,400+
Assessments delivered
Fortune 100
Trusted at every scale
01  /  Our discipline

We focus exclusively on penetration testing.

And we have for years. Because of that focus, we can direct all of our energy to performing quality tests, delivering on time, keeping pace with the threat landscape, and ensuring our methodology delivers real value — not a scanner dump.

01
Quality-first testing
Deep, manual testing by senior operators — not automated scanning with a logo on it.
02
Delivered on time
Predictable scheduling and clear communication, from kickoff to readout.
03
Ahead of the threat
Continuous research keeps our techniques current with how attackers actually operate.
04
Findings that create value
Impact-first reporting your engineers can act on, plus root-cause guidance.
By the numbers

Data breaches are prevalent and expensive. The numbers bear it out.

Drawn from more than 500 security assessments we’ve completed for clients across every industry and size of business.

98%
of environments we test contain a moderate-or-higher risk
72%
contain a critical- or high-severity vulnerability
5–14
business days to complete a typical assessment
49%
of our engagements are for Fortune 500 companies
Severity of highest risk found across assessments
Critical  35% High  37% Moderate  26% None  2%
02  /  What we test

Six assessments. One standard.

All services  →
01
Web Application Penetration Testing
Rarefied's web application penetration testing service assesses web applications for security weaknesses, providing detailed reports with recommendations for remediation.
Application
02
API Penetration Testing
Safeguard your sensitive data with Rarefied's API penetration testing service, which detects and exploits vulnerabilities in APIs.
Application
03
Mobile Application Penetration Testing
Secure mobile applications with Rarefied's Mobile application penetration testing.
Application
04
AI Red Teaming
Rarefied's AI red teaming stress-tests your LLM and AI-powered applications for prompt injection, jailbreaks, data leakage, and unsafe agent behavior, then reports what your team needs to fix.
Application
05
External Network Penetration Testing
Rarefied's External network penetration testing service focuses on identifying and exploiting vulnerabilities in internet-facing assets.
Network
06
Internal Network Penetration Testing
Rarefied's internal network penetration testing service focuses on identifying vulnerabilities within an organization's local network to enhance resilience against internal threats and protect critical assets and data.
Network
03  /  Methodology

A consistent, standards-based process.

Every target moves through the same four phases, iterating until the engagement’s objectives are met — so results are repeatable, defensible, and directly actionable.

01
Information Gathering & Enumeration
We learn everything we can about your environment, technologies, and exposed attack surface.
02
Vulnerability Detection
We combine manual testing with automated tooling to identify candidate weaknesses.
03
Analysis
We prioritize the most promising attack paths by likelihood and business impact.
04
Exploitation & Leverage
We safely exploit and chain findings to demonstrate realistic impact — then dig deeper.
Aligned to NIST SP 800-115 PTES OWASP OWASP MASVS MITRE ATT&CK
04  /  Reach

From startups to the Fortune 100.

We test for any size of business, and partner with our clients through remediation of the thousands of vulnerabilities we find — across web applications, network hosts, APIs, and mobile.

49%
Fortune 500
41%
Midsize
10%
Small business
Research · Case study
How we found a critical flaw in Chase Bank’s rewards platform.

A vulnerability that could let a user reimburse credit-card transactions for a fraction of their real cost in reward points — responsibly disclosed, fixed by Chase, and retested to confirm remediation.

Severity
Critical
Status
Fixed & retested
Researcher
Zack Sanders · 2023
Get started

Find what needs attention — before someone else does.

We look forward to discussing your security testing needs and scoping an engagement that fits.