Top 50 UK Software Products of 2026

Automated Penetration Testing for Fast-Moving Teams

Intruder continuously tests your infrastructure, web apps, and APIs for the vulnerabilities that matter most - giving you always-on coverage, not just a point-in-time report.

Join 3,000+ companies securing their attack surface with Intruder

Results in hours, not weeks

When new vulnerabilities are announced, Intruder checks your systems automatically - so you know your exposure before exploits spread. When new vulnerabilities are announced.

Stay ahead of emerging threats

When new vulnerabilities are announced, Intruder checks your systems automatically - so you know your exposure before exploits spread. When new vulnerabilities are announced, Intruder checks.

Always-on coverage

When new vulnerabilities are announced, Intruder checks your systems automatically - so you know your exposure before exploits spread. When new vulnerabilities are

Know if you'd pass an audit before the auditor asks

Intruder checks for the issues auditors care about - exposed services, missing encryption, unpatched software - and generates compliance-ready reports for SOC 2, ISO 27001, or HIPAA without manual evidence gathering.

See What a pen tester sees, every day

Intruder covers many of the same issues found in manual pen tests - injection flaws, misconfigurations, authentication weaknesses - and re-tests automatically as your environment changes, so findings stay current, not stale.

From finding to fixing, without the back and forth

Intruder integrates with Jira, GitHub, GitLab, and Slack to route findings to the right team automatically. GregAI triages issues, explains root causes, and drafts remediation notes, so fixes happen faster without chasing people for updates.

Find what's exposed, fix what matters, and stay ahead of new threats

External Scanning

Infrastructure Security

Attack Surface Monitoring

Respond to changes

CSPM

Daily cloud config checks

DAST

Secure web apps

Risk Based Prioritization

No more alert fatigue

Cyber Hygiene Reporting

Demonstrate progress

Emerging Threat Detection

Check and act fast

Asset Discovery

Reveal unknown targets

Secrets Detection

Prevent leaked credentials

Website Security

140k+ checks

Container Image Scanning

Automated image discovery

API Security

Test your APIs

Compliance

SOC 2, ISO, HIPAA, DORA

Internal Scanning

Secure employee devices

Free

For companies getting started with security
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4.8 out of 5

Cloud

BEST VALUE
Best for cloud native companies using open source tools
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/ month
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4.8 out of 5

Pro

Best for companies with hybrid environments using enterprise tools
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/ month
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4.8 out of 5

Enterprise

Best for companies with sprawling attack surfaces
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4.8 out of 5
Can I scan single page applications (SPAs) with Intruder?

Yes, you can! Learn all about how to scan SPAs with Intruder here.

How do I scan my website for vulnerabilities with Intruder?

The first thing you need to do is add your website as a target by entering its IP address or url. You can then kick off your first scan in just a few clicks – it’s that simple!

What website security checks does Intruder perform?

Intruder’s website security scans check for web-layer security problems such as SQL injection and cross-site scripting, as well as other security misconfigurations. Read more about Intruder’s checks here. 

What do you mean by scanning your website, internally?

Your internal systems can be just as enticing to hackers as your external network so it’s important to test your website for vulnerabilities there too.

When we talk about scanning the website internally, we’re actually talking about scanning the web server that the website is hosted on. Web servers are internet-facing, but any sensitive information connected to them (such as databases) will sit behind a firewall, to prevent them from being reached by unauthorized individuals.

If ‘stuff’ can’t be reached externally, then remote checks won’t work and so you’d need to run local checks. At Intruder, all local/internal checks are performed via an agent which you’d install on the server.  

Internal vulnerability scanning also hunts through your website for missing patches and detects insecure versions of many thousands of software components and frameworks, including operating systems and network devices. Find out more about internal vulnerability scanning.

Can I scan my website if it is built using a CMS, such as WordPress?

Intruder works with many platforms, including WordPress, Drupal, Joomla, Squarespace and more.

Which plan should I choose if I just want to scan my website?

Choose our Essential or Cloud plan to externally scan your website. If you are looking at our internal vulnerability scanning capability, this is only available to our Pro and Enterprise customers. Visit our pricing page to learn more.

What license should I buy for a website that doesn’t have a login-page?

Buy any of our Essential or Pro plans that cover infrastructure licenses by default. Head to our pricing page for more information.