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Website Security Check

Website Vulnerability Scanner & External Attack Surface Monitoring

Hexiosec ASM continuously discovers and monitors your organisation, showing where attackers can target you online.
  • Speak to an ASM cyber security expert
  • Book a 30-min demo of Hexiosec ASM
  • Request a free report on your security posture
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Hexiosec ASM Engineering Lead

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How to run a website security check with continuous external monitoring

If you’re looking for a website security checker to find vulnerabilities in a website, Hexiosec ASM goes beyond one-off scans. It continuously monitors your external attack surface - including domains, subdomains, internet-facing services, and email security - so you can see what’s exposed and potentially exploitable.

With the NCSC’s Web Check service now retired, Hexiosec ASM provides a modern alternative: ongoing external security monitoring with prioritised findings, clear remediation guidance, and exportable reporting to track improvements and share results with stakeholders.

Key features

The power of Hexiosec ASM

Hexiosec ASM asset discovery widget

Visibility and insight

Scan your estate in real time, ensuring an accurate and up-to-date picture of your attack surface with a built in action plan.

Mail checks widget inside Hexiosec ASM

Security analysis

Continuously check your web and mail assets for out of date software, misconfigurations and publicly exposed services so you can address the issues before a hacker can exploit them.

Report generation widget Hexiosec ASM

Supporting features

Create reports and exports of your data to share with your stakeholders. Use our API to connect ASM to your toolkit.

Testimonials

What our clients say

Darren L.

IT Support and Infrastructure Manager, Government Administration

Hexiosec ASM is so easy to get going with, and a massive win for identifying vulnerabilities, and have them analysed in terms of risk so you can focus attention in the right area at the right time.

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Andy K.

Security Manager, Financial Services

Simplicity - give it a domain and it will find out what it can about subdomains, related domains and any issues it identifies with them.

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Tim N.

Technical Sales Consultant, Synack

What I appreciate the most about Hexiosec ASM is the level of accuracy this platform provides... Hexiosec's unique solution provides results that are immediately accurate and actionable.

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Get started

Try Hexiosec ASM for free until 31st March 2026

To support MyNCSC users of Web Check and Mail Check, we are offering Hexiosec ASM for free until 31st March 2026.

Ensure you are fully protected with a smooth transition to Hexiosec ASM ahead of the NCSC shutting down their services at the end of March.

Request a Hexiosec ASM trial