The one Intruder you can trust

Proactive exposure management for lean security teams.

Trusted by 3,000+ security and IT teams

Our Mission

To make cybersecurity accessible for the 99%

Our Story

Intruder was founded in 2015 to help solve the information overload crisis in vulnerability management. Having worked both as an ethical hacker for tier one companies, and for blue teams defending critical national infrastructure, Founder Chris Wallis noticed that while vulnerability management tools were great at finding issues, they were less useful when it came to prioritizing them, tracking them, and timely alerting when problems arose. Quite simply - the most important issues were often getting lost in the noise.

Intruder's mission from day one has been to help divide the needles from the haystack, focusing on what matters, while ignoring the rest. Effective cyber security is about getting the basics right. Intruder helps you do that, saving time on the easy stuff, so you can focus on the rest.

Since its inception in 2015, Intruder has been awarded multiple accolades, was selected for GCHQ's Cyber Accelerator, and was included on Deloitte's Tech Fast 50 2023 list as the fastest-growing cybersecurity company in the UK. It is now proud to have over 3,000 happy customers all over the world.

Key Milestones

2015
Intruder
was founded
2015
Vulnerability Management launches
2018
Emerging Threat
Scans launched
2024
Attack Surface Management launched
2025
Intruder Cloud
Security launches
2025
GregAI
2023
Deloitte Fast50 Winner
2015
First paying
customer
2019
Our mascot
Greg was born
2022
2000 customers
2025
3000 customers
2017
GCHQ accelerator

Leadership team

Chris Wallis
Founder & CEO
Chris Wallis is the founder and CEO of Intruder. With deep experience in both offensive security and defensive operations, Chris has worked hands-on with global banks, major financial institutions, and critical national infrastructure, securing some of the most targeted and high-risk environments in the world. This blend of attacker-led insight and real-world defense crafted Intruder's practical approach to finding and fixing the vulnerabilities that matter, before they can be exploited.
Patrick Craston
CTO
David Koke
Head of Marketing
Andy Hornegold
VP of Product
Dane Vallejo
VP of Sales
Chris Wallis
CEO

Company values

We enjoy the journey

Yes, we want to build the best company in the world, but how we get there matters. It’s about the journey as much as the destination.

We focus on creating value

We spend our time wisely on the things that matter the most to our customers, colleagues, and Intruder.

The best idea wins

We listen to our colleagues and we let the best ideas rise to the top, wherever they come from.

We achieve big things in small steps

The only way to eat an elephant is one bite at a time. We build great things in small achievable pieces.

We respect each other

Everyone's input is valued, respectful discussions, solid reasoning, and learning from mistakes.