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Free Tools for Business Security

Strong security doesn't require a large budget. These categories of free and low-cost tools cover the most important business security needs. We recommend types of tools rather than specific products — the right choice depends on your existing setup.

NCSC resources for small businesses

The National Cyber Security Centre publishes free, practical guidance and tools specifically for UK small businesses. These are authoritative, reliable, and require no technical expertise.

  • The NCSC's Small Business Guide covers the most important steps in plain English.
  • Exercise in a Box is a free tool for running simulated cyber incident exercises with your team.
  • The NCSC's Cyber Essentials self-assessment tool helps you prepare for certification.
  • Weekly threat briefings from the NCSC keep you informed about current risks facing UK businesses.
  • The NCSC also provides guidance on specific topics such as cloud security, supply chain risk, and working from home.

Microsoft's built-in security tools

If you use Microsoft 365, you have access to a range of security tools that are included in your subscription — many businesses don't realise how much is already available.

  • Microsoft Secure Score (in the Microsoft 365 Security Centre) rates your security posture and gives actionable recommendations.
  • Security Defaults in Entra ID (formerly Azure AD) enforces MFA for all users at no additional cost.
  • Microsoft Defender Antivirus is included in all Windows 10/11 devices.
  • Microsoft Defender for Business is available at low cost and provides endpoint protection across all your devices.
  • The Microsoft 365 admin centre includes audit logs, sign-in activity, and alert policies to help you detect suspicious activity.

Password management for teams

A shared password manager for your business ensures everyone uses strong, unique passwords and that access to shared accounts is secure and auditable.

  • Look for a password manager with business features: team vaults, role-based access, and audit logs.
  • Ensure the solution allows you to recover access if an employee leaves without sharing their master password.
  • Some password managers integrate with single sign-on (SSO) — useful if you use many cloud applications.
  • Several providers offer free tiers or trials suitable for small teams.
  • Combine a password manager with MFA on all business accounts for maximum protection.

Vulnerability and configuration checking

Free tools can scan your network and public-facing systems for common vulnerabilities and misconfigured settings before attackers find them.

  • The NCSC's Web Check service scans your website for common security issues and is free for UK organisations.
  • Qualys BrowserCheck and similar tools check for outdated plugins and browser vulnerabilities.
  • Shodan and similar internet scanning tools show what your business looks like from the internet — useful for identifying exposed services.
  • Many broadband routers have a built-in security scanner or vulnerability check in their admin panels.

Business continuity planning

A simple business continuity plan ensures you know what to do if your systems are compromised, unavailable, or destroyed. It doesn't need to be complex.

  • Document the most critical business processes and what you'd do if they were unavailable.
  • Include contact details for IT support, your cyber insurer, and key suppliers in your plan.
  • Test your plan at least once a year — a tabletop exercise with your team is sufficient.
  • The NCSC's Business Continuity for Small Businesses guidance is a practical starting point.
  • Store a copy of your plan somewhere accessible if your systems are down — a printed copy, cloud document, or offsite storage.

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