NSAuditor AI

NSAuditor AI is an on-premises network security scanner for organizations that need to assess infrastructure they control. It is best suited to teams comfortable operating their own scanner and configuring AI providers. Its free Community tier is a strong starting point; paid tiers add vulnerability intelligence and compliance workflows, but Enterprise carries important limits on what its evidence can establish.

Overview

NSAuditor AI covers network hosts, CIDR subnets, AWS, Azure, GCP, TLS, DNS and OT targets. Authenticated and continuous scanning make it relevant beyond one-off network checks, while the on-premises model puts deployment and operation in the customer's hands rather than offering a hosted service.

All tiers support AI analysis through OpenAI, Claude or Ollama, using customer-provided API keys. Ollama can support analysis without an internet connection when configured for offline operation. The maker says scan data, findings and reports remain on the customer's machine, and license validation also works offline using a JWT. These are meaningful options for teams with data-control requirements, though users must arrange their own provider access or local AI setup.

The product is open source, and Community is MIT licensed. It can also run as an MCP server for MCP-aware clients, extending its use to compatible workflows without changing its core role as a scanner.

Key features

Scanning and reporting

Community includes 27 scanner plugins, parallel subnet scanning and a SYN scanner built as an Nmap wrapper. Webhook alerts and JSON, HTML, SARIF and CSV exports give teams practical ways to route or review findings without a paid plan. That is a substantial baseline for organizations prepared to manage their own scanning process.

Paid intelligence and cloud auditing

Pro adds offline-first NVD CVE matching and exploit-first triage using CISA KEV and FIRST EPSS data stores populated by the customer. This is aimed at teams that want to prioritize findings against vulnerability and exploitation data while retaining an offline-capable workflow; it does require maintaining those data stores. Pro also adds risk scoring, an executive HTML report and Jira-importer CSV.

Enterprise adds cloud auditors for AWS, GCP and Azure, plus evidence packs covering SOC 2, HIPAA, NIST CSF 2.0, PCI DSS v4.0.1, ISO/IEC 27001:2022, CIS Controls v8, GDPR Article 32 and NIST SP 800-171 Rev 2. Those outputs can support compliance work, but they do not replace every formal requirement: HIPAA evidence coverage is not a BAA, and NIST SP 800-171 evidence is preparation support, not certification.

Enterprise's opt-in Vanta, Drata and Secureframe connectors have an explicit early-access caveat: production validation is still in progress, so they are not yet a dependable basis for production workflows. Pro includes email support with a 48-hour SLA; Enterprise adds a dedicated support channel and onboarding call.

Pricing

Community costs nothing, billed Forever. It includes 27 scanner plugins, MIT licensing and no restrictions, making it the clearest fit for individuals and teams wanting a no-cost, self-managed starting point.

Pro (annual) costs $39 a year, billed as $470/yr. Pro (monthly) costs $49 a month, billed each month. Both include everything in Community, CVE matching, risk scoring and email support with a 48-hour SLA. Annual billing is the lower-cost option for a team committed to a year; monthly billing costs more over a year but avoids that annual commitment. Neither adds the cloud auditors or compliance evidence packs reserved for Enterprise.

Enterprise Base costs $2,000 a year with annual invoicing and supports up to 5 seats or scanning nodes. Enterprise Growth costs $5,000 a year for up to 25 seats or scanning nodes. Enterprise Scale costs $10,000 a year and includes unlimited seats, a custom SLA and custom plugins. These tiers are for organizations that need Enterprise capabilities at different deployment sizes; the seat and node caps make Base and Growth less suitable as scanning expands.

Platforms

NSAuditor AI supports Linux, macOS and Windows, alongside self-hosted deployment. Its on-premises approach and ability to run offline can suit controlled environments, but buyers seeking a vendor-hosted scanner should look elsewhere.

Who it's for

The maker identifies MSPs, MSSPs, compliance consultancies and mid-market teams in healthcare, finance, government and critical infrastructure as users. Community makes sense for smaller teams able to run scans and handle findings themselves. Pro is a more fitting step for teams that need CVE matching, risk scoring and a defined email-support SLA. Enterprise suits larger or compliance-focused environments needing cloud audits, evidence packs, or formal onboarding and support—provided they treat the GRC connectors as early access and understand the limits of the evidence.

Pros and cons

• Pro: Community has 27 plugins, parallel subnet scanning, alerts and multiple export formats at no cost, giving self-managed teams a useful scanning and reporting base.
• Pro: Every tier supports three AI-provider choices, including Ollama for offline analysis, while scan data and reports stay on the customer's machine according to the maker.
• Pro: Authenticated and continuous scanning, plus support for network, cloud, TLS, DNS and OT targets, give it scope beyond a narrow network-only check.
• Con: On-premises deployment means teams must operate the scanner themselves; it is not a hosted-service option.
• Con: AI analysis depends on customer-provided API keys or a configured Ollama setup, so it is not a turnkey bundled AI service.
• Con: Enterprise compliance outputs have defined limits, and its Vanta, Drata and Secureframe connectors should be treated as early access for production use.
• Con: Enterprise starts at $2,000 a year, while Base is capped at 5 seats or scanning nodes and Growth at 25.

Alternatives

OpenVAS is another freemium option with Linux, macOS, Windows, web, API and self-hosted platforms; choose it when its free virtual appliance and community feed, despite limited enterprise features and no default support, better fit your deployment.

Intruder offers a free tier capped at 5 infrastructure targets, with web apps excluded, weekly external scans and one connected cloud account; consider it when that smaller free scope matches your needs.

ManageEngine Vulnerability Manager Plus has a free edition and a Professional on-premises plan; compare it if you want to evaluate that product's free and paid options.

Nuclei is a free, MIT-licensed CLI primarily intended as a standalone tool; choose it when a command-line tool is a better fit than NSAuditor AI's tiered scanning product.

Sirius is a free option from Open Security, whose operators build and use it.

Nmap is free for end users, though its license does not allow redistribution within commercial software or hardware products; choose it when you need that standalone tool rather than NSAuditor AI's broader tier structure.

OWASP Nettacker is free, open-source software under Apache License 2.0.

Browse Vulnerability Scanning Software and Network Vulnerability Scanners for more options.

Verdict

NSAuditor AI is a strong fit for teams that want self-hosted, potentially offline scanning with a capable free starting tier and a path to CVE intelligence or compliance-oriented workflows. Choose it for local control and broad target coverage; look elsewhere if you need a hosted service, a low-friction managed deployment, or compliance evidence that can stand in for a BAA, certification, or production-validated GRC integration.