Warin vs Nessus: external attack surface vs internal infrastructure
Nessus is the gold standard for internal, credentialed infrastructure scanning — but Nessus Professional has no web app scanning and starts at $4,790/year. Warin covers the external attack surface a startup must watch, for a fraction of the price.
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The short version
Warin vs Nessus: the bottom line
Nessus scans internal infrastructure; Warin watches your external attack surface. Warin includes web app scanning, breach monitoring, and guided fixes at $49–$99/month — Nessus Professional has none of those and starts at $4,790/year.
Nessus is the gold standard for internal, credentialed infrastructure scanning — but that's a different job from watching the external attack surface a SaaS founder actually has to defend:
- Web app scanning is included in every Warin plan; Nessus Professional has none (Expert is $6,790/yr).
- $49/month vs $4,790/year — and Warin needs no install or self-hosting.
- Email breach monitoring and AI fix guides are built into Warin; Nessus offers neither.
Feature by feature
Warin vs Nessus at a glance
| Capability | Warin Best for startups | Nessus |
|---|---|---|
| Web application scanning (DAST) | Every plan | Expert tier only ($6,790/yr) |
| Network & port scanning | Included | Yes (core strength) |
| Subdomain discovery | Every plan | Expert tier (limited) |
| Asset discovery & inventory | Automatic | Expert tier |
| SSL / TLS monitoring (deep) | Config + expiry | Not a focus |
| Email breach monitoring | Included | Not available |
| AI fix guides | Per finding, plain English | CVE / CVSS data only |
| Risk prioritization | Severity + asset context | CVSS / EPSS / VPR |
| Setup & price | $49/mo, no install | $4,790/yr, self-hosted |
Included Limited / add-on Not available
Pricing and capabilities verified from public vendor sources, June 2026. We update these pages as vendors change their plans.
Why teams choose Warin
Where Warin comes out ahead
Web app scanning, included
Warin scans your web applications for OWASP Top 10 issues on every plan. Nessus Professional — the $4,790/year edition — has no web application scanning at all; you need Nessus Expert ($6,790/yr) or the separate Web App Scanning product.
Built for the external attack surface
Warin continuously discovers and monitors what's exposed to the internet. Nessus is internal-first; external attack surface is a secondary use case that only the Expert edition addresses.
Email breach monitoring built in
Warin alerts you when your team's credentials leak. Nessus has no breach or credential monitoring in any edition.
Fixes in plain English
Warin turns each finding into step-by-step remediation. Nessus outputs CVE and CVSS/EPSS/VPR data — useful to a security engineer, opaque to a founder.
Deep SSL/TLS monitoring
Warin tracks cipher suites, protocol versions, HSTS, and certificate expiry. Deep TLS configuration analysis isn't a Nessus focus.
Nothing to install or maintain
Warin is fully hosted and starts in minutes. Nessus is software you install, host, configure, and keep running.
Pricing
What you'll actually pay
- Starter $49/mo 5 assets · 3 users · every feature ($588/yr)
- Pro $99/mo 25 assets · 10 users · 14-day free trial
Flat, transparent pricing. Every feature on every plan — only asset and user counts change.
- Nessus Professional $4,790/yr No web app scanning, no external discovery
- Nessus Expert $6,790/yr Adds web app scanning + attack surface discovery
Web application scanning requires Nessus Expert ($6,790/yr) or the standalone Tenable Web App Scanning product ($6,790/yr for 5 FQDNs). Nessus Professional at $4,790/yr does not scan web apps.
A fair look
Where Nessus might be the better fit
Nessus is the gold standard at what it's built for. We'd point you to Nessus if:
- You need deep internal infrastructure scanning. Nessus is best-in-class at scanning servers, operating systems, and devices for vulnerabilities.
- Credentialed scanning matters. Nessus's authenticated, host-level scans give deep visibility into patch levels and misconfigurations inside your network.
- You need patch and configuration compliance. Nessus ships pre-built audit policies and is widely accepted for compliance work, including PCI DSS.
- Your priority is internal, not internet-facing. If most of your risk lives behind the firewall, Nessus is purpose-built for that.
Common questions
Warin vs Nessus: FAQ
For external attack surface monitoring, yes. Warin covers web and network scanning, discovery, SSL/TLS, breach monitoring, and guided remediation for your internet-facing assets at $49–$99/month. Nessus is internal-infrastructure focused and, in its Professional edition, doesn't scan web apps at all. For deep internal/credentialed scanning and compliance, Nessus remains the specialist.
No. Nessus Professional ($4,790/year) does not include web application scanning. Web app scanning is only available with Nessus Expert ($6,790/year) or the separate Tenable Web App Scanning product ($6,790/year for 5 FQDNs). Warin includes web app scanning on every plan.
Nessus Professional starts at $4,790/year and Nessus Expert at $6,790/year, both self-hosted. Warin is a flat $49/month (about $588/year) for Starter or $99/month for Pro, fully hosted with every feature included.
Nessus is built for internal, credentialed infrastructure scanning and compliance and is installed and run by a technical user. Warin is a hosted external attack surface monitor for startups, covering internet-facing web, network, SSL/TLS, and credential exposure with plain-English fixes and no install.
Nessus has no email/credential breach monitoring in any edition. External attack surface discovery is only in the Expert edition, and it's not a founder-friendly continuous subdomain discovery tool. Warin includes both breach monitoring and continuous discovery on every plan.
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