5 Free Cybersecurity Tools for SMEs in 2026

No need for millions to start a serious cybersecurity approach. Five free or freemium tools that cover the fundamentals for an SME with 5 to 50 employees.

1. Bitwarden — free password manager

The open source standard. Free version covers most SME needs:

• Encrypted cloud vault for each user
• iOS/Android/desktop apps and browser extension
• Team sharing via Teams plan (~3 €/month/user)
• Open source and auditable

2. Microsoft Authenticator — free MFA

If you use M365 (Google Workspace = equivalent Google Authenticator):

• Free mobile app
• MFA via push notification or TOTP
• Blocks 99% of account compromise attempts
• Immediate activation on M365 admin side

3. OpenVAS / Greenbone CE — vulnerability scanning

To identify security gaps in your internal network:

• Community version free
• Detects known CVEs on servers and endpoints
• Report with CVSS prioritization
• Setup 1-2 hours on Linux VM or Docker

4. Wazuh — open source SIEM

For SMEs wanting some security monitoring without paying for Splunk:

• Intrusion detection plus log analysis
• Agents on Windows/Linux/Mac
• Centralized dashboard via Kibana
• Self-hosted or lightweight cloud option

5. Google Phishing Quiz — user training

The weakest link remains human. To raise awareness at zero cost:

• phishingquiz.withgoogle.com
• 8 emails to classify (legitimate or phishing)
• Ideal as kickoff for a 30-minute training session
• To go further: KnowBe4 Free Phish Test or Sosafe Free Tier

Bonus — often-forgotten Microsoft 365 tools

Included in M365 Business Standard at no extra cost:

• Secure Score: dashboard for cyber posture with prioritized actions
• Conditional Access: access policy based on conditions (IP, device, risk)
• Microsoft Defender SmartScreen: integrated web and email protection

Conclusion

With these 5 tools (4 free + 1 at ~3€/user), you cover 80% of cybersecurity fundamentals for an SME. The rest = written procedures, tested backups, and a bit of discipline.