# What Claude (Anthropic) with web search answered for vulnerability scanning tools (small businesses) on 2026-10-21

## In short

On 2026-10-21, Claude (Anthropic) with web search was asked "best vulnerability scanning tools for small businesses". It named 21 brands; the first six, in order, were Intruder, Tenable Nessus, Nessus, Nessus Essentials, 16 IPs and Microsoft.

| Fact | Value |
| --- | --- |
| Question | best vulnerability scanning tools for small businesses |
| Asked on | 2026-10-21 |
| Engine | Claude (Anthropic) with web search |
| Model | claude-opus-5 |
| Brands named | 21 |
| Sources cited | 8 |
| Audience | small businesses |
| Coverage | Coverage: Claude (Anthropic) with web search. Other engines not included. |
| Last verified | 2026-10-21 |

Page: https://bikoosh.com/answers/s/vulnerability-scanning-tools-small-businesses-2026-10-21
Coverage: Claude (Anthropic) with web search. Other engines not included.

## The answer, as recorded

Asked on 2026-10-21 through Claude (Anthropic) with web search (model claude-opus-5).

> ## My actual shortlist
> 
> **1. Intruder** - my default recommendation for most small businesses. Cloud-based, you point it at your IPs/domains and it scans external perimeter + internal + cloud, with automatic rescans when new CVEs drop. Entry pricing around **$149/month**, and ~59% of its reviewer base is small business, which tells you it's genuinely built for your size rather than down-scaled enterprise. ([G2](https://www.g2.com/compare/intruder-vs-tenable-nessus))
> 
> **2. Tenable Nessus** - the industry standard for *internal* network scanning (servers, workstations, network gear). Start with **Nessus Essentials, free for up to 16 IPs** - for a small office that's often enough. Professional is ~$3,990-4,790/year for unlimited IPs, which is a real jump, so only step up when 16 IPs stops cutting it. Caveat: it's a raw scanner, not a managed program - it hands you a long findings list and expects you to triage it. ([ethicalhacking.ai](https://ethicalhacking.ai/pricing/nessus-professional-pricing), [ifeeltech](https://ifeeltech.com/blog/tenable-nessus-review))
> 
> **3. Microsoft Defender Vulnerability Management** - check this first if you already pay for **Microsoft 365 Business Premium*

## Brands named, in the order the engine gave

| Position | Brand | How it was named |
|---|---|---|
| 1 | Intruder | recommended |
| 2 | Tenable Nessus | mentioned |
| 3 | Nessus | mentioned |
| 4 | Nessus Essentials | recommended |
| 5 | 16 IPs | recommended |
| 6 | Microsoft | mentioned |
| 7 | Microsoft Defender | mentioned |
| 8 | Defender | mentioned |
| 9 | Microsoft 365 | mentioned |
| 10 | Microsoft 365 Business | mentioned |
| 11 | Microsoft 365 Business Premium | mentioned |
| 12 | Greenbone OpenVAS | mentioned |
| 13 | OpenVAS | mentioned |
| 14 | Community Edition | mentioned |
| 15 | Astra Security | mentioned |
| 16 | Pentest-Tools.com | mentioned |
| 17 | Snyk | mentioned |
| 18 | Qualys VMDR | mentioned |
| 19 | Malwarebytes | mentioned |
| 20 | Nessus Professional | mentioned |
| 21 | Tenable Nessus Professional | mentioned |

## Sources the engine cited

- https://www.g2.com/compare/intruder-vs-tenable-nessus (review)
- https://ethicalhacking.ai/pricing/nessus-professional-pricing (other)
- https://ifeeltech.com/blog/tenable-nessus-review (other)
- https://www.greenbone.net/en/vulnerability-scanner-openvas-vs-nessus/ (vendor)
- https://www.getastra.com/blog/dast/vulnerability-scanning-for-smbs/ (other)
- https://www.g2.com/products/pentest-tools-com/pricing (review)
- https://www.g2.com/categories/vulnerability-scanner/small-business (review)
- https://www.esecurityplanet.com/networks/smb-vulnerability-scanner/ (other)

The question page: https://bikoosh.com/answers/q/vulnerability-scanning-tools/small-businesses

Alerts and membership: Answer Watch Pro, 79 USD per month: https://bikoosh.com/answers. Bikoosh is monitoring assistance, not complete protection.

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.