We hunt
threats.
Before
they hunt you.
Tristarnex is a cybersecurity firm built for businesses that cannot afford to be the next breach headline. We bring enterprise-grade protection, threat intelligence, and response capability to organisations of every size.
Six things we do
exceptionally well.
Threat Detection & Response
Threat detection and response is the continuous monitoring of an organisation's endpoints, network, and cloud environment to identify malicious activity in real time and automatically contain threats before they cause damage.
Real-time endpoint monitoring with AI-assisted triage. Critical threats isolated automatically in under 2 seconds — before they spread.
Penetration Testing
Penetration testing is an authorised, simulated cyberattack against a computer system, network, or web application to identify exploitable vulnerabilities before real adversaries can. It produces a prioritised remediation plan based on actual risk.
We attack your systems the way a real adversary would. Network, web application, social engineering, and red team assessments with actionable remediation plans.
Security Assessment
A security assessment is a systematic review of an organisation's current security controls, policies, and infrastructure to identify gaps, quantify risk, and produce a prioritised roadmap for improvement.
A complete, honest picture of your security posture — gaps, priorities, and what fixing them actually costs. No inflated findings, no jargon.
Vulnerability Management
Vulnerability management is the ongoing process of identifying, classifying, prioritising, and remediating security vulnerabilities across an organisation's systems and software, scored by real-world exploitability rather than theoretical severity.
Continuous tracking of vulnerabilities across your environment, scored by real-world exploitability — not just theoretical severity ratings.
Security Awareness Training
Security awareness training educates employees to recognise and respond to cyber threats such as phishing, social engineering, and credential theft. Effective training changes actual behaviour through simulations and hands-on exercises.
Phishing simulations and hands-on workshops that change actual behaviour. Built for the people in your business, not just the IT team.
Incident Response
Incident response is the structured process of detecting, containing, eradicating, and recovering from a cybersecurity breach or attack. A dedicated incident responder is assigned to manage containment, forensic investigation, and post-incident improvements.
When something goes wrong, speed is everything. Guaranteed response time, dedicated responder, full containment and forensics capability on demand.
The Tristarnex
methodology
Understand your environment
Before we touch anything, we map your attack surface — systems, people, data flows, third-party connections, and existing controls. Most organisations are surprised by what we find.
Assess your real risk
We prioritise by impact and exploitability — not by CVSS score. A medium-severity misconfiguration that exposes your domain admin is more dangerous than ten critical CVEs in an isolated system.
Deploy layered defences
We harden from the outside in — perimeter, endpoints, identity, data. Each layer reduces attacker dwell time and raises the cost of a successful breach.
Monitor continuously
Our AI-assisted monitoring watches 24/7 and reduces alert noise by over 90%. When a real threat appears, you hear about it in plain English — not a raw log dump.
Respond and improve
Every incident is a lesson. We document what happened, why it got through, and what changes permanently reduce your exposure. Your security posture improves after every engagement.
Global Threat Intelligence.
We track nation-state actors and cybercrime syndicates in real time. Our models adapt to their behavior before they target your perimeter.
Built to protect
the businesses that
get overlooked
Attacker mindset
We think like the people trying to break in. Every defence we build is tested against real adversary techniques. We do not sell peace of mind — we build actual security.
Transparency first
You will always know exactly what we found, why it matters, and what fixing it costs. No inflated risk scores. No jargon designed to obscure. Clear answers to hard questions.
Speed over ceremony
When a threat is detected, the right response is fast and decisive — not a committee meeting. Our AI-assisted workflows and clear escalation paths mean threats get contained in seconds, not hours.
Built for the long run
We are a new company. We have no legacy clients to protect us, no bloated sales team, and nothing to hide behind. We grow by doing excellent work and earning your trust — every single engagement.
Enterprise-grade protection.
Without the enterprise price.
Tristarnex is a cybersecurity firm founded in 2026 to protect businesses that attackers increasingly target but the industry consistently underserves. We deliver enterprise-grade threat detection, penetration testing, and incident response to organisations of every size — without the enterprise price tag or the enterprise complexity.
We are built differently from the start. No legacy overhead, no generic playbooks, no reports designed to look impressive rather than be useful. Every engagement is led by a senior practitioner. Every recommendation is justified by your specific risk profile, not a framework checklist. Every alert we send you comes with a plain-English explanation you can act on immediately.
We are early-stage and deliberately taking on a small number of pilot clients. That means you get direct access to our founding team, faster response times than any established firm can offer, and a partner that is genuinely invested in proving its value on every single engagement.
How it works.
Six steps from first call to full protection. No jargon, no surprises.
A conversation, not a sales pitch.
Tell us about your business, your team size, what systems you use, and what keeps you up at night. We tell you honestly where your biggest risks are — even if that means telling you we are not the right fit.
Protection is not a one-time event. Every month we review what we detected, what we blocked, and what changed in the threat landscape that affects your business. Every quarter we run a fresh assessment to catch new risks introduced by system changes, new staff, or new attacker techniques. Your security posture gets stronger over time — not just set and forgotten.
You will never receive a report you cannot understand. Every finding comes with a plain-English explanation of what it means for your business, a severity level in plain terms (not a CVSS score), and a specific recommended action with an honest effort and cost estimate. If something is not worth fixing right now, we will tell you that too.
When a critical threat is detected at 2am, the machine is isolated automatically before anyone wakes up. You are not dependent on a human being available.
Our AI filters out the false positives before they reach you. The average EDR tool generates hundreds of alerts a day. We target under five that actually need your attention.
We do not require 12-month contracts to get started. If we are not delivering value, you can leave. We grow by doing good work, not by trapping customers.
We do not sell
products.
We solve problems.
Most cybersecurity failures happen not because the tools were wrong — but because nobody understood the environment, prioritised the right risks, or built defences that matched the actual threat. Our methodology fixes that.
We start by understanding your environment completely before recommending anything. We prioritise the risks that would actually hurt your business, not the ones that score highest on a generic scale. We build defences that match your specific threat model, deploy them carefully without disrupting your operations, and monitor continuously with AI-assisted triage that filters noise before it reaches your team. When a real threat appears, we respond in seconds — not hours. And after every engagement, we make sure your security posture is stronger than it was before we arrived.
Frequently asked
questions.
Book a free
security briefing
We will spend 30 minutes understanding your current setup, tell you honestly where your biggest risks are, and explain how we can help — with no obligation.
123 Cyber Street
London, EC1A 1BB
United Kingdom