About Us
Pentest

Overview
Our approach to pentesting

Web Application
Web apps, web servers & websites

Mobile Application
iOS, Android and other apps

LLM & AI Application
Red Team LLM & AI pentesting

Cloud Security
AWS, Azure and GCP testing

Physical Penetration
Onsite security assessment

External Infrastructure
Perimeter defence testing

Internal Infrastructure
Internal network & insider threats

Social Engineering
In-depth, highly-targeted phishing

Phishing Simulation
Phishing testing & awareness
Platform Features

External Vulnerability Scanning
Efficient vulnerability management 24/7, with Scan Remove the guesswork in detecting vulnerabilities in your internet-facing infrastructure.

Threat Intelligence & Web Scanning
Hacker-powered Threat Intelligence 80% of breaches are caused by hackers finding and exploiting known vulnerabilities.
Resources

Resource Hubs

Cloud Security Hub
All you need to know about Cloud Security

Penetration Testing Hub
All you need to know about Penetration Testing

Guides
Topical whitepapers that dive into the current state of affairs

Latest Articles

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Customers

Testimonials
What people are saying about the service at OnSecurity

Case Studies

Secure and supported: Why Retail inMotion renews with OnSecurity year after year

Insurtech Tech Company Partners with OnSecurity for their Security

Seamless, efficient, and collaborative testing – Starpeak sets a new standard for security of its digital posture

Blackout Technologies Uses One Testing Dashboard to Manage All of its Security

See All Case Studies
Events
Contact

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AI-augmented Pentesting:

Human Expertise

Where It Matters Most.

The best of both worlds: AI efficiency paired with human ingenuity. Comprehensive, CREST-approved pentesting that saves time and money without compromising quality.

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What they say

See what our clients are syaing

I had an issue with trousers Brooke tavern as usual responded urgently and offered all help necessary

Mat Stocks

Director at InTech

We thoroughly enjoyed the service with OnSecurity. It was thorough and efficient.

Paul Geary

Head of Dev at Cortech

We were actively pursuing ISO 27001 and knew we needed the right monitoring in place. OnSecurity stood out, not just as a pentesting provider, but as a partner who understood what modern, growing businesses like ours need..

CTO

Menna

Pentest providers should give clients a net-positive of their time. If clients are having to spend a lot of time managing the process, it becomes tedious. OnSecurity’s services were quick and straightforward.

Ben Harper

CTO & Co-Founder at Sitehop

The simplicity of OnSecurity’s platform was the selling point for us! The tool fits perfectly into our security programme and is simple enough for the team to follow. We have a very streamlined department so something that could manage all aspects of our vulnerability management was key.

Nick

IT Director at 1000heads

Case Studies

Screenshot 2025 09 30 At 09.56.29

Secure and supported: Why Retail inMotion renews with OnSecurity year after year

OnSecurity offers a consultative approach to testing with open communication channels, allowing your engineers to build relationships with our testers from the start of engagement and work together to find and fix vulnerabilities as quickly as possible.

30 September 2025

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Insurtech Tech Company Partners with OnSecurity for their Security

DotSys engaged OnSecurity for penetration testing, including web application tests, internal cloud testing, and infrastructure testing, as part of their annual testing portfolio.

22 September 2025

Screenshot 2025 09 18 At 10.24.20

Seamless, efficient, and collaborative testing – Starpeak sets a new standard for security of its digital posture

In March 2023, Starpeak engaged OnSecurity for a web application penetration test. The platform’s user-friendly approach proved to be a game-changer compared to traditional methods.

18 September 2025