Intruder
London attack surface monitoring and vulnerability scanning with a free plan
Quick Overview
| Company | Intruder Systems Ltd (company number 09529593) |
|---|---|
| Category | Attack Surface Management and Security Ratings |
| Headquarters | London, England, United Kingdom |
| Founded | Not stated |
| EU Presence | Yes - United Kingdom (UK) |
| Data Location | Not checked |
| Open Source | No |
| GDPR Compliant | Yes |
| Self-Hosting | No |
| Main Features | Attack surface monitoring, change detection, external and internal scanning, cloud security checks, container image scanning, DAST, emerging threat scans, AI pentesting |
| Pricing | Free plan; Cloud, Pro and Enterprise by quote or checkout; AI pentests from USD 3,500 per test |
| Best For | Small and mid-sized teams that want hands-off monitoring of what they expose |
| Replaces | Bitsight, Tenable |
Detailed Review
Intruder joins attack surface monitoring, vulnerability management, cloud checks and pentests in one subscription. Its homepage claims more than 3,000 companies use it.
The company is Intruder Systems Ltd, registered in England with company number 09529593 per the footer.
Plans and scope
The pricing page lists a Free plan with weekly external scans, one cloud account, two container images and three users, a Cloud plan with a 14-day free trial, a Pro plan and a quote-based Enterprise plan. Euro or dollar amounts for the paid plans did not appear in the server-rendered text, so none are listed here.
Change detection
Real-time change detection scans new assets as ports open or cloud services appear. Enterprise adds automated shadow IT discovery and monitoring on all ports.
Limitations to Consider
Intruder is a scanner and monitor, not a security ratings service, so it gives no supplier scores. Paid plan prices were not visible in the page text and pentests are priced in US dollars. Internal scanning needs agents, and the free plan is limited to ports 80 and 443. For validated findings, Hadrian goes further.
Who Should Use Intruder
Small security teams and SaaS companies that want attack surface monitoring with a free start.
Pros and Cons
Pros
- Free plan available
- 14-day trial on the Cloud plan
- Change detection for new assets
- Many integrations
- UK Ltd with published company number
Cons
- No supplier ratings
- Paid plan prices not in page text
- Pentests priced in US dollars
- Free plan limited to ports 80 and 443
Alternatives to Intruder
Other European attack surface management and security ratings worth comparing before you decide:
Orpheus Cyber
United Kingdom · Cyber risk scores for your own estate and your suppliers
CybelAngel
France · Daily external scanning for exposed assets and leaked data
Hadrian
Netherlands · Continuous attack surface mapping with validated exposures
ONYPHE
France · Weekly whole-Internet scan data with an ASM edition
See all European attack surface management and security ratings or compare them directly against Bitsight on our alternatives page.
Frequently Asked Questions
Yes. The pricing page lists a Free plan with weekly external vulnerability scans for up to three users.
No. It gives a cyber hygiene score for your own assets, not supplier ratings.
Intruder Systems Ltd is registered in England.