{"question": "best vulnerability scanning tools for small businesses", "category": "vulnerability-scanning-tools", "category_name": "vulnerability scanning tools", "audience": "small-businesses", "audience_name": "small businesses", "engine": "Claude (Anthropic) with web search", "model": "claude-opus-5", "asked_at": "2026-10-28T23:36:36Z", "permalink": "https://bikoosh.com/answers/s/vulnerability-scanning-tools-small-businesses-2026-10-28", "question_page": "https://bikoosh.com/answers/q/vulnerability-scanning-tools/small-businesses", "brands_named": [{"position": 1, "brand": "Intruder", "label": "recommended"}, {"position": 2, "brand": "Nessus", "label": "recommended"}, {"position": 3, "brand": "Nessus Essentials", "label": "recommended"}, {"position": 4, "brand": "Nessus Professional", "label": "compared"}, {"position": 5, "brand": "Professional", "label": "compared"}, {"position": 6, "brand": "Microsoft", "label": "recommended"}, {"position": 7, "brand": "Microsoft Defender", "label": "recommended"}, {"position": 8, "brand": "Defender", "label": "recommended"}, {"position": 9, "brand": "Microsoft 365", "label": "recommended"}, {"position": 10, "brand": "Microsoft 365 Business", "label": "recommended"}, {"position": 11, "brand": "Microsoft 365 Business Premium", "label": "recommended"}, {"position": 12, "brand": "Acunetix", "label": "recommended"}, {"position": 13, "brand": "Invicti", "label": "recommended"}, {"position": 14, "brand": "WordPress", "label": "recommended"}, {"position": 15, "brand": "Astra Security", "label": "recommended"}, {"position": 16, "brand": "Greenbone / OpenVAS", "label": "recommended"}, {"position": 17, "brand": "OpenVAS", "label": "recommended"}, {"position": 18, "brand": "Qualys VMDR", "label": "mentioned"}, {"position": 19, "brand": "Snyk", "label": "mentioned"}, {"position": 20, "brand": "Snyk/Socket", "label": "mentioned"}], "sources_cited": [{"url": "https://www.intruder.io/compare/qualys", "domain": "intruder.io", "source_type": "vendor"}, {"url": "https://www.g2.com/compare/qualys-was-vs-tenable-nessus-vs-intruder", "domain": "g2.com", "source_type": "review"}, {"url": "https://peerspot.com/products/comparisons/greenbone_vs_microsoft-defender-vulnerability-management", "domain": "peerspot.com", "source_type": "other"}, {"url": "https://us.fitgap.com/search/vulnerability-scanner-software/small-business", "domain": "us.fitgap.com", "source_type": "other"}, {"url": "https://www.getastra.com/blog/dast/vulnerability-scanning-for-smbs/", "domain": "getastra.com", "source_type": "other"}, {"url": "https://www.capterra.com/p/171380/OpenVAS/", "domain": "capterra.com", "source_type": "review"}, {"url": "https://www.g2.com/compare/intruder-vs-qualys-vmdr", "domain": "g2.com", "source_type": "review"}], "answer_text": "Here's what I'd actually recommend, roughly in the order I'd try them:\n\n**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))\n\n**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", "answer_truncated": true, "measurement": "One answer from one engine on one date. Not a ranking and not a claim about the world; brands the engine did not name are not recorded.", "limitation": "Coverage: Claude (Anthropic) with web search. Other engines not included.", "alerts": {"name": "Answer Watch Pro", "price_usd": 79, "period": "month", "gets": "daily change alerts for up to 5 brands in what one AI answer engine says, history, CSV export. Coverage: Claude (Anthropic) with web search. Other engines not included", "url": "https://bikoosh.com/answers"}}