Pentesting at the speed of business

CREST pen-testing designed and built from the ground up for fast-moving businesses like yours. Stay secure with high quality, manual testing, delivered by the fastest and most flexible vendor in the world.

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Trusted by high-growth brands all over the world

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Easy numbers

Faster and More Cost-Effective



Your business moves fast, and so do we. Online booking, on-demand scheduling and real-time reporting make us the fastest pentest vendor in the world. Have your completed report in the time it takes our competitors just to get your test booked in.

CREST Approved

Next generation engagement meets CREST-approved pentesting. Our practices and testers are CREST-approved, so you can rest-assured we are carrying out best-in-class manual pen-testing on all our engagments.


more cost effective

Precise hourly billing, no re-test charges and no postponement or cancellation fees. Our unique features help our clients with multiple testing requirements save an average of 38% on their annual pentesting bill.


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6 ways we've made pentesting faster and more cost effective

We’re changing everything. Book online in 60 seconds. Real time issue reporting. Hourly billing. Free re-testing. No cancellation or postponement fees. Full integration with your own tools. All this on top of the high quality, manual pentesting you expect from a CREST-approved pentest vendor.

Cyber Essentials
GDPR Certified
Quality Principles Certified
Isame Gold Certified mb-3

"Working in a fast paced environment where customers require rapid change and development OnSecurity provide us with a service to support even the tightest timelines. The portal allows us to easily quote, book and review penetration test findings in a simple and user friendly way."

Grant Wylie, Product Manager

The Idol

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Innovation at our heart

We're using technology to make pentesting better

From the outset we invested heavily in technology and innovation, to make sure our clients get the best experience possible. From booking a test online, to being able to chat to our testers during the engagement. From real-time reporting to free, one-click re-testing. We are innovators.

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"What sets OnSecurity apart is how flexible their platform makes pentesting. They are much less rigid around rescheduling and willing to work in small chunks during the build cycle. This ability to call on them as-and-when made them feel part of the dev team."

Ben Francis, Head of Security & Operations

Giff Gaff

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Honesty & Integrity

We Believe In Fair Pricing For Everyone

We don’t believe in charging different rates for different clients. We don’t believe in padding out quotes to the nearest day. Our transparent, hourly billing means everyone pays the same hourly rate, and we quote to the nearest hour, not the nearest day. Plus, with no cancellation or postponement fees, we provide value you can trust.

"Their in depth knowledge and strategic approach to testing was just what we required. They are thorough, very professional and their tools and reports are easy to use. They keep in touch regularly, even in between testing cycles and are always on hand to help and offer advice."

Dave Wilson, IT Director

Hollywood Bowl Group

Hollywood Bowl Group

High quality, CREST-approved pentesting

We're A Pentesting Company Founded By Pentesters

OnSecurity was created by three experienced pentesters. We’re a company that cares deeply about the quality of our testing. OnSecurity is CREST-approved, and all our testers are qualified CREST testers. We believe in manual first testing, and investing in developing talent through a structured and rigorous training programme. That’s how we keep the quality of our tests so high. Don’t believe us? Why not follow along with one of our #hackstreams

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