Intruder

Overview

Intruder is an online vulnerability scanner aimed at what it calls “the 99%” of organisations without large security teams. It combines several scanning engines, naming Tenable, OpenVAS and Nuclei, and adds its own checks, emerging-threat scans, cloud synchronisation and attack surface monitoring^[17]. Plans cover external and internal infrastructure, web applications, APIs and cloud environments^[17].

Intruder’s model is designed for small teams: scans are scheduled automatically, results are filtered to reduce noise, and reports are formatted to support compliance with standards such as SOC 2, Cyber Essentials and ISO 27001^[17]. It also sells AI-powered web application penetration tests starting from US$3,500 per test^[17].

Pricing combines a base fee with a small fee per target across Free, Cloud, Pro and Enterprise plans; Enterprise is custom, a 14-day free trial includes the Cloud plan’s features, and annual billing saves 20%^[17]. Intruder is privately held. Because it relies partly on third-party engines, organisations already licensing Tenable may find overlap.

Intruder features

• External and internal infrastructure scanning
• Web application and API scanning
• Cloud account sync
• Emerging-threat scans
• Compliance-ready reports
• AI-powered pentests from US$3,500

Intruder pricing

Free plan (licensed targets including five web apps); Cloud and Pro plans priced as a base fee plus a small fee per target, with 20% off for annual billing; Enterprise custom. Prices exclude VAT. 14-day trial with Cloud features. Pentests from US$3,500 per test.

Intruder strengths and limitations

Appears in

• Best Vulnerability Scanners in 2026 #9

Intruder alternatives and competitors

Alternatives to Intruder: companies ranked in the same lists.

• Wiz
• Microsoft Power BI
• Tenable
• Rapid7
• QQualys
• Aqua Security Trivy
• Detectify
• Greenbone OPENVAS
• Invicti (incl. Acunetix)
• PortSwigger Burp Suite
• ProjectDiscovery Nuclei
• Snyk