OWASP Nettacker
OWASP Nettacker: A free, modular scanner for discovery, vulnerability checks, and flexible reporting. Ranked #16 of 22 in Network Vulnerability Scanners by our editors (7.3/10); pricing: Free plan; best for free modular network and subdomain discovery.
At a glance
- Editor score7.3 / 10
- PricingFree plan
- Best forFree modular network and subdomain discovery
- Free planYes
- Paid fromFree
- DeploymentOn-premises
- Facts checked20 Sep 2026
Where it wins
- Free, open-source model with on-premises deployment
- CLI, REST API, Web UI, and Docker-based operation
- HTML, JSON, CSV, and text reporting with scan comparisons
Where it doesn't
- Fewer verified enterprise controls than some alternatives
- Fewer verified integrations for larger security ecosystems
- Requires self-hosted operation and technical administration
Our verdict on OWASP Nettacker
OWASP Nettacker is an open-source Python framework for automated penetration testing, information gathering, network reconnaissance, and vulnerability assessment. It is intended for cybersecurity professionals, ethical hackers, and teams conducting authorized internal or external security assessments. The project covers applications and networks, with checks for open ports, services, vulnerabilities, misconfigurations, default credentials, and subdomains. Its on-premises deployment model supports Windows, Linux, and macOS, while the platform list also includes web, API, and self-hosted operation.
Its modular scan architecture is the main differentiator. Nettacker combines port and service scanning with network and subdomain discovery, vulnerability and CVE checks, misconfiguration and default-credential detection, credential brute-force modules, and historical scan storage with drift comparison. Teams can work through the command line, REST API, or Web UI, then produce HTML, JSON, CSV, or text reports. This breadth makes it suitable for recurring reconnaissance and assessment workflows where flexible scan methods and machine-readable output matter.
Nettacker is a strong fit for teams that want a free framework they can operate and adapt within their own environments. The open-source model avoids a paid plan structure, while self-hosted deployment gives technical teams direct control over operation. It is less suitable for organizations seeking a packaged enterprise control layer or a broad, established integration ecosystem. Those buyers may prefer an alternative centered on managed workflows, verified enterprise controls, or deeper platform integrations rather than modular, self-directed scanning.
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OWASP Nettacker pricing
OWASP Nettacker fact sheet
| Free plan | Yes |
|---|---|
| Paid from | Free |
| Deployment | On-premises |
| Credentialed scans | Not verified |
| Agent-based scanning | Not verified |
| Compliance checks | Not verified |
| Asset limit | Not verified |
| Supported operating systems | Windows, Linux, macOS |
| Network discovery | Yes |
| Deployment | Self-hosted |
| Platforms | Web, Windows, macOS, Linux |
| Support | Community, Docs |
| Built for | Solo, Small business, Mid-market (editorial estimate) |
| Pricing | Free plan |
| Website | owasp.org |
| Facts checked | 20 Sep 2026 |
Alternatives to OWASP Nettacker
- IntruderA broad hybrid scanner with a useful free tier and target-based paid pricing.9.4
- OpenVASA mature, flexible scanner for organizations that need broad vulnerability management.9.2
- ManageEngine Vulnerability Manager PlusA broad vulnerability manager with affordable entry pricing and strong remediation coverage.9.1
See all OWASP Nettacker alternatives →
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Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026
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