Penetration Testing
Adversary-simulation exercises across web, mobile, API, internal network, and social engineering vectors. CREST-certified methodology.
Ferrinel combines elite cybersecurity engineering with bespoke software development — protecting and powering organisations at the frontier of digital risk.
Protecting infrastructure for 180+ organisations across Europe, the Middle East, and North America
Trusted by security-conscious organisations
Most software companies bolt security on at the end. At Ferrinel, security is designed in from line one. Our engineers hold dual expertise: writing production-grade code and thinking like adversaries.
The result is software that doesn't just function beautifully — it stands resilient under real-world attack conditions that break ordinary systems.
Last penetration test: 14 days ago · Findings: 0 critical
From red team operations to full-stack product engineering — one partner, complete coverage.
Adversary-simulation exercises across web, mobile, API, internal network, and social engineering vectors. CREST-certified methodology.
24/7 security operations with SIEM, EDR, and AI-assisted anomaly detection. Sub-15-minute mean time to detection across your entire estate.
Rapid-deployment IR retainers with digital forensics, malware analysis, and crisis communications support. Average containment: 4 hours.
Full-stack product teams who embed security into every sprint. Laravel, Vue, React, Node — shipped with SAST, DAST, and threat modelling built in.
Zero-trust cloud designs across AWS, Azure, and GCP. Infrastructure-as-code, policy-as-code, and continuous cloud posture management.
End-to-end compliance programmes: ISO 27001, SOC 2 Type II, DORA, NIS2, and Cyber Essentials Plus. Gap analysis to certification.
Every engineer at Ferrinel carries both development and security certifications. There is no handoff between "dev" and "security" — the same mind holds both disciplines.
We join your existing workflows, tooling, and culture. You get the expertise of a specialist firm with the feel of an in-house team — without the hiring risk.
We subscribe to 14 global threat feeds, operate a private honeypot network, and contribute to MITRE ATT&CK. Your defences are informed by what adversaries are actually doing right now.
No scope creep, no hidden fees, no ambiguous reporting. Every engagement delivers a clear, boardroom-ready output with actionable remediation paths and risk rankings.
We offer 90-day post-engagement support as standard. If something we recommended isn't working, we fix it — at our cost, not yours.
Our entire operation is headquartered in London. All data processing and storage is performed within the UK, with no third-country transfers — critical for regulated industries.
We only adopt technologies where we have battle-tested mastery. Our security toolchain is updated continuously against emerging threat intelligence — not locked into vendor contracts that age faster than the threat landscape.
Our accreditations aren't decorative. Every certification is actively maintained, audited, and tested by independent assessors every 12 months.
See our full credentialsPrevented estimated £14M fraud exposure. Zero downtime during remediation. Client achieved PCI-DSS Level 1 within 90 days.
2M+ patient records. Zero breaches since launch in 2022. SOC 2 Type II certified.
Identified 23 previously unknown vulnerabilities in SCADA systems. Full remediation plan delivered in 6 weeks.
4.2M customers. 99.98% uptime across 3 years. Infrastructure cost reduced 34%. Fully ISO 27001 certified.
"Ferrinel's red team found a critical path-traversal vulnerability that four other firms had missed in prior assessments. The quality of their reporting alone is worth the engagement."
"We rebuilt our entire digital health platform with Ferrinel. They never once let security become a blocker — instead it became our biggest competitive differentiator."
"After a ransomware incident with a previous provider, Ferrinel was recommended to us. Containment in under three hours. Fully operational within 48. They saved our business."
Tell us about your environment and we'll respond within 4 business hours with a scoped proposal — no obligation, no aggressive sales process.
We respond within 4 business hours · UK-based team · All data handled under UK GDPR