Intruder

Name: Intruder
Brand: Intruder
Rating: 4.8 (211 reviews)

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Continuous vulnerability management to stop breaches before they start

Security Cloud & Infrastructure Vulnerability Scanning Compliance

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4.8(211 across the web)

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Reviews onG2Capterra

211 reviews tracked

The Bottom Line

Entry price

Free, no paid tier

Biggest pro

Intuitive interface and easy setup, even for complex scanning

Biggest con

Internal scanning only available on Pro and Enterprise plans

TL;DR - Intruder

Automated attack surface management and vulnerability scanning across external, internal, and cloud environments.
Risk-based prioritization and GregAI virtual analyst to reduce noise and focus on the most critical issues.
Integrates with popular tools and supports compliance reporting for SOC 2, ISO 27001, HIPAA, and more.

Pricing: Free forever

Best for: Individuals & startups

4.8/5 across review platforms

What is Intruder?

Editorial review

Intruder is a comprehensive cybersecurity platform that helps organizations stop breaches before they start by providing continuous vulnerability management, attack surface monitoring, and cloud security posture management. It combines automated scanning with risk-based prioritization to cut through alert fatigue, enabling teams to focus on the most critical issues. The platform covers external and internal infrastructure, web applications, APIs, container images, and cloud environments across AWS, Azure, and Google Cloud. Key capabilities include automated asset discovery to reveal shadow IT, daily cloud configuration checks, emerging threat detection, and a virtual security analyst named GregAI that helps teams work smarter. Intruder integrates with popular tools like Slack, Jira, GitHub, and ServiceNow, and supports compliance with standards such as SOC 2, ISO 27001, and HIPAA. With a large customer base worldwide, Intruder is designed for lean, time-strapped security teams that need to demonstrate progress and maintain cyber hygiene.

LCLouis CorneloupUpdated Aug 18, 2026 · how we evaluateSourceintruder.io ↗

Pros & Cons

Pros

Intuitive interface and easy setup, even for complex scanning
Comprehensive coverage including cloud, containers, APIs, and internal infrastructure
Excellent customer support and dedicated success managers for enterprise

Cons

Internal scanning only available on Pro and Enterprise plans
Free plan limited to one cloud account and one scan per month

Ratings Across the Web

4.8(211 reviews)

Intruder holds an aggregate rating of 4.8 out of 5 from 211 reviews across G2 and Capterra, last checked August 18, 2026.

Ratings aggregated from independent review platforms. Learn more

Preview

Key Features

External and internal network scanning (port 80 & 443 to all ports depending on plan)Attack surface management with automated asset discovery and subdomain discoveryCloud security posture management for AWS, Azure, and Google CloudContainer image scanning and secrets detectionWeb application scanning with 140k+ checks and API security testingEmerging threat detection and change monitoring with rapid responseRisk-based prioritization and cyber hygiene reportingCompliance automation with integrations for Drata, Vanta, and SIEM tools

Pricing Plans

Free Trial

Pricing checked Aug 18, 2026

Free

$0 / mo

External Scanning
Infrastructure Security
Attack Surface Monitoring
Respond to changes
CSPM
Daily cloud config checks
Asset Discovery
Reveal unknown targets

Calculate your cost View full pricing

Is Intruder worth the price?

85/100

Intruder's Free tier at $0/mo is unusually generous for a security platform, offering a full suite of features including external scanning, CSPM, DAST, and container image scanning with no time limit.

This is a strong value for small teams or those wanting to test the platform, but the lack of paid tiers in the data suggests the real cost may come from scaling or advanced needs. Best for startups and lean security teams who need broad coverage without upfront investment.

Hidden Costs & Gotchas

No paid tiers shown; likely per-asset fees

Yearly billing may lock you in

Advanced compliance may require add-ons

Scaling beyond free tier could be pricey

How Intruder Compares to Competitors

Intruder's free tier outshines many competitors like Qualys or Tenable, which typically offer limited free trials or stripped-down free versions. While CrowdStrike and Rapid7 focus on premium enterprise pricing, Intruder's generous free offering positions it as a cost-effective entry point, though paid plans may align with market rates for advanced features.

Reviews

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4.8/5

Across 211 verified user reviews on G2, Capterra

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Best Intruder Alternatives

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Still deciding?

Most buyers shortlist 2 or 3 tools before committing. Pull a side-by-side comparison or browse the full alternatives shortlist below.

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Intruder FAQ

How does Intruder's GregAI help with vulnerability management?

GregAI is a virtual security analyst that automatically triages scan results, identifies critical issues, and provides actionable remediation guidance, helping teams reduce noise and respond faster.

Can Intruder scan internal networks and employee devices?

Yes, internal scanning is available on Pro and Enterprise plans, allowing you to scan employee devices and internal infrastructure behind the firewall.

Does Intruder support authenticated scanning for web applications?

Yes, Intruder can perform authenticated web application scans, including checks for modern web apps, APIs, and single-page applications (SPAs).

How does Intruder handle compliance reporting for standards like SOC 2 and ISO 27001?

Intruder provides watermarked reports and integrates with compliance automation platforms like Drata and Vanta, helping customers pass audits for SOC 2, ISO 27001, HIPAA, Cyber Essentials, and more.

What cloud providers does Intruder support for cloud security posture management?

Intruder supports AWS, Azure, and Google Cloud, with the ability to connect multiple accounts and automatically detect new cloud services while running daily misconfiguration checks.

Can I change the number of targets or licenses after signing up?

Yes, you can increase or decrease licenses as needed. Licenses are used for 30 days per target, and increases are pro-rated while decreases are credited to your account.

Does Intruder offer a free trial and what does it include?

Yes, Intruder offers a 14-day free trial that includes all features of the Cloud plan, allowing you to scan up to 5 targets with unlimited scans during the trial period.

What integrations does Intruder provide for existing security workflows?

Intruder integrates with Slack, Microsoft Teams, Jira, GitHub, GitLab, ServiceNow, Azure DevOps, Zapier, and Okta, plus SIEM integrations like Microsoft Sentinel and compliance tools like Drata and Vanta.

Source: intruder.io

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