Boutique Penetration Testing
With 15 years of experience and hundreds of projects behind us, we’ve developed a boutique approach to penetration testing. We work on one project at a time to go deep, focus fully, and find the critical security issues that could seriously impact your business.
A Commitment That Sets Us Apart
If critical risks emerge outside the original scope, we escalate and investigate — because business threats rarely stay confined.
We offer a complimentary re-validation of remediated findings, helping your team confirm fixes and strengthen your security posture.
Your assessment is handled by a focused team with no parallel assignments, ensuring deep attention and complete alignment.
Our assessments prioritize vulnerabilities with real-world impact that could lead to data breaches, financial loss, or compliance violations.
You’ll always have direct access to senior consultants, ensuring full visibility and rapid response throughout the engagement.
Trusted by industry leaders and innovators
Experience That Drives Results
Proven expertise and industry recognition
Our team includes winners of BlackHat, HITB, and top CTF competitions, backed by OSCP-certified professionals.
Security research and zero-day discovery
We go beyond surface-level testing — uncovering over 12 previously unknown (0-day) vulnerabilities during client engagements.
Technology and business logic mastery
Every project includes a deep-dive into your tech stack, application architecture, and business logic to identify high-impact risks.
Exploiting Race Conditions in Modern Web Apps
Oct 24, 2024 · 8 min read
A Deep Dive into LLM Prompt Injection Attacks
Oct 15, 2024 · 12 min read
Specialized in What Matters Most
As a boutique firm, we focus exclusively on Web, Mobile, Infrastructure, and API security — where real threats live.
Web & APIs
Core of digital business operations, frequently exposed to authentication flaws, API chaining abuse, and business logic manipulation. Pentesting simulates full attacker workflows across UI and API surfaces to reveal real-world exploitation paths. Focus on uncovering hidden vulnerabilities that impact revenue flow, user integrity, and data confidentiality.
Business Value
Protects critical revenue-generating services, accelerates enterprise sales (SOC 2 / ISO 27001 alignment), and reduces incident response costs.
Securing High-Stakes Verticals
From Revolut’s data breach to Robinhood’s support system hack—financial platforms bleed fast and publicly. Pentesting isn’t optional in fintech—it’s margin protection in disguise.
- ✓Required by PCI DSS, SOC 2, AMLD, DORA, and other strict financial compliance frameworks
- ✓Focused on business logic abuse: transactions, payouts, rate manipulation, and fund diversion
- ✓Simulates user-centric threats: credential stuffing, client-side exploits, and API abuse at scale
iGaming platforms are goldmines for attackers—pentesting keeps the odds in your favor. From EA account hijacks to Diablo gold dupes, one hidden flaw can take down your license.
- ✓Targets of constant attack: from account takeovers, to game rigging, and payment fraud
- ✓Aligned with UKGC, UIGEA, AML, and other global betting regulations
- ✓Includes deep white-box audits of third-party platforms and white-labeled providers to detect hidden backdoors
- ✓In-depth OSINT research to identify exposed data and reduce the legal and regulatory risks
From Slack’s private GitHub leak to Okta’s support portal breach—SaaS is always in the spotlight. Pentesting shows customers you take trust seriously—before they ask.
- ✓Attackers hunt for broken auth, tenant leaks, and privilege escalation paths in multi-user environments
- ✓Covers SOC 2, ISO 27001, GDPR, and rising enterprise demands for pentest reports in procurement
- ✓Simulates real-world SaaS risks: session hijacks, forgotten admin panels, and CI/CD misconfigurations
Inside ONSEC’s Pentest Report
Compare our report with your latest penetration test deliverable. You’ll see the difference in depth of analysis, focus on business-critical risks, and clarity of remediation guidance. ONSEC reports are designed to support real-world security decisions — not just check compliance boxes.
Let's Break Things
(Before They Break You)
Get a boutique penetration test from our dedicated team. One project at a time, maximum focus on your security.