# What Claude (Anthropic) with web search answered for vulnerability scanning tools (small businesses) on 2026-10-28

## In short

On 2026-10-28, Claude (Anthropic) with web search was asked "best vulnerability scanning tools for small businesses". It named 20 brands; the first six, in order, were Intruder, Nessus, Nessus Essentials, Nessus Professional, Professional and Microsoft.

| Fact | Value |
| --- | --- |
| Question | best vulnerability scanning tools for small businesses |
| Asked on | 2026-10-28 |
| Engine | Claude (Anthropic) with web search |
| Model | claude-opus-5 |
| Brands named | 20 |
| Sources cited | 7 |
| Audience | small businesses |
| Coverage | Coverage: Claude (Anthropic) with web search. Other engines not included. |
| Last verified | 2026-10-28 |

Page: https://bikoosh.com/answers/s/vulnerability-scanning-tools-small-businesses-2026-10-28
Coverage: Claude (Anthropic) with web search. Other engines not included.

## The answer, as recorded

Asked on 2026-10-28 through Claude (Anthropic) with web search (model claude-opus-5).

> Here's what I'd actually recommend, roughly in the order I'd try them:
> 
> **1. Intruder** - My default recommendation for a small business with internet-facing assets (website, VPN, mail server, a few cloud VMs). It's built for teams without a security specialist: you point it at your IPs/domains, it scans continuously, alerts you when new CVEs affect you, and the reports are clean enough to hand to a client or auditor. Essential starts around $149/month with no annual lock-in, which is the main reason it beats the enterprise tools here. Largest share of its users are small businesses. ([intruder.io](https://www.intruder.io/compare/qualys), [g2.com](https://www.g2.com/compare/qualys-was-vs-tenable-nessus-vs-intruder))
> 
> **2. Nessus Essentials** - Start here if your budget is zero. Free, scans up to 5 IPs, and it's the same scanning engine behind the most widely deployed scanner in the industry (~200k checks, very low false-positive rate). Caveat: the free tier is now a time-limited license rather than free-forever, and 5 IPs runs out fast. Nessus Professional is about $4,790/year, which is usually the wrong move for an SMB versus Intruder. ([g2.com](https://www.g2.com/compare/qualys-w

## Brands named, in the order the engine gave

| Position | Brand | How it was named |
|---|---|---|
| 1 | Intruder | recommended |
| 2 | Nessus | recommended |
| 3 | Nessus Essentials | recommended |
| 4 | Nessus Professional | compared |
| 5 | Professional | compared |
| 6 | Microsoft | recommended |
| 7 | Microsoft Defender | recommended |
| 8 | Defender | recommended |
| 9 | Microsoft 365 | recommended |
| 10 | Microsoft 365 Business | recommended |
| 11 | Microsoft 365 Business Premium | recommended |
| 12 | Acunetix | recommended |
| 13 | Invicti | recommended |
| 14 | WordPress | recommended |
| 15 | Astra Security | recommended |
| 16 | Greenbone / OpenVAS | recommended |
| 17 | OpenVAS | recommended |
| 18 | Qualys VMDR | mentioned |
| 19 | Snyk | mentioned |
| 20 | Snyk/Socket | mentioned |

## Sources the engine cited

- https://www.intruder.io/compare/qualys (vendor)
- https://www.g2.com/compare/qualys-was-vs-tenable-nessus-vs-intruder (review)
- https://peerspot.com/products/comparisons/greenbone_vs_microsoft-defender-vulnerability-management (other)
- https://us.fitgap.com/search/vulnerability-scanner-software/small-business (other)
- https://www.getastra.com/blog/dast/vulnerability-scanning-for-smbs/ (other)
- https://www.capterra.com/p/171380/OpenVAS/ (review)
- https://www.g2.com/compare/intruder-vs-qualys-vmdr (review)

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.