What Claude (Anthropic) with web search answered for vulnerability scanning tools (small businesses) on 2026-10-09

Claude (Anthropic) with web search claude-opus-5 asked 2026-10-09

Coverage: Claude (Anthropic) with web search. Other engines not included.

The question asked, verbatim: best vulnerability scanning tools for small businesses

Brands named, in the order the engine gave

1. Intruder recommended
   Intruder - My default recommendation for most small businesses.
2. Tenable Nessus recommended
   Tenable Nessus Professional - The industry workhorse for internal network and host scanning, and the tool most IT consultants already know.
3. Tenable Nessus Professional recommended
   Tenable Nessus Professional - The industry workhorse for internal network and host scanning, and the tool most IT consultants already know.
4. Nessus Professional recommended
   Tenable Nessus Professional - The industry workhorse for internal network and host scanning, and the tool most IT consultants already know.
5. Greenbone OpenVAS recommended
   Greenbone OpenVAS - The free option worth taking seriously.
6. OpenVAS recommended
   Greenbone OpenVAS - The free option worth taking seriously.
7. Qualys VMDR recommended
   Qualys VMDR - Worth a quote if you're in a regulated space or need SaaS-delivered scanning plus compliance reporting (PCI, etc.) in one place.
8. Snyk recommended
   Snyk - Not a network scanner;
9. Astra Security recommended
   Astra Security - A reasonable middle path if you want scanning plus some human pentest review bundled, mainly for web apps.

Sources the engine cited

The answer, as recorded

Here's what I'd actually recommend, roughly in the order I'd suggest trying them: **1. Intruder** - My default recommendation for most small businesses. It's built for teams without a security specialist: point it at your domains and IPs, it continuously scans your external attack surface and emails you when something new and exploitable shows up. Starts around $149/month, which is the realistic entry point for a small company. ([g2.com/compare/intruder-vs-tenable-nessus](https://www.g2.com/compare/intruder-vs-tenable-nessus), [intruder.io](https://www.intruder.io/blog/the-top-vulnerability-scanning-tools)) **2. Tenable Nessus Professional** - The industry workhorse for internal network and host scanning, and the tool most IT consultants already know. Deeper and more configurable than Intruder, but it's a raw scanner: it hands you findings, not a prioritized workflow, and someone has to interpret them. ~$3,400-4,400/year for a one-year license. ([penetrify.cloud/pl/pricing/nessus](https://www.penetrify.cloud/pl/pricing/nessus/)) **3. Greenbone OpenVAS** - The free option worth taking seriously. Genuinely capable network scanning at zero license cost, and a good fit if you have a small footprint and someone technical who can stand up the appliance. The tradeoff is setup effort and noisier results. ([getastra.com](https://www.getastra.com/blog/dast/vulnerability-scanning-for-smbs/)) **4. Qualys VMDR** - Worth a quote if you're in a regulated space or need SaaS-delivered scanning plus compliance reporting (PCI, etc.) in one place. Strong product, but pricing isn't public and the sales cycle is enterprise-flavored. ([g2.com/compare/intruder-vs-qualys-vmdr](https://www.g2.com/compare/intruder-vs-qualys-vmdr)) **5. Snyk** - Not a network scanner; this is the one to add if you ship your own software. It scans code, dependencies, containers, and IaC, with a free tier that covers a small dev team. Different problem than the above, and most small businesses that write code need both. ([getastra.com](https://www.getastra.com/blog/dast/vulnerability-scanning-for-smbs/)) **6. Astra Security** - A reasonable middle path if you want scanning plus some human pentest review bundled, mainly for web apps. Smaller vendor, but priced for SMBs. ([getastra.com](https://www.getastra.com/blog/dast/vulnerability-scanning-for-smbs/)) Two notes. G2's "vulnerability scanner - small business" category currently ranks Malwarebytes at the top on review volume, but that's a category-tagging artifact - Malwarebytes is endpoint antivirus, not a vulnerability scanner, so don't let that ranking steer you ([g2.com](https://www.g2.com/categories/vulnerability-scanner/small-business)). And if you have no internal IT capacity at all, the better buy is usually a managed service or MSP that runs one of these for you, rather than a license nobody checks. If you want one answer: start with Intruder on your external footprint, and add Nessus or OpenVAS for internal scanning once that's clean.

Near this answer

The same question, recorded on other dates: 2026-10-06, 2026-10-03, 2026-10-01, 2026-09-29, 2026-09-27, 2026-09-25, 2026-09-23, 2026-09-21, 2026-09-16, 2026-09-14, 2026-09-13.

vulnerability scanning tools, asked for other audiences: remote teams (asked 2026-10-09).

Other categories with a recorded answer: backup and recovery software, cloud hosting providers, compliance automation software, data loss prevention software.

Markdown edition · JSON record · the question page, with every recording · Answer Watch · AEO Watch

Answer Watch records what one AI answer engine said on one date, nothing more. Each page names the engine and the model, carries the date the question was asked, and lists the brands that appeared in the answer in the order the engine gave them, with the sources it cited. It is a measurement, not a ranking, not a recommendation and not a claim about the world. Brands that did not appear in an answer are not named on any public page. Coverage: Claude (Anthropic) with web search. Other engines not included.