Cybersecurity software ranges from free open-source tools to $50+ per endpoint per month. Small businesses need protection but often cannot justify enterprise pricing. This guide ranks cybersecurity tools by actual cost, focusing on solutions that provide real protection at startup and SMB budgets.
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Tier 1: Free Security Tools
Microsoft Defender for Business $0 with M365
If you already pay for Microsoft 365 Business Premium ($22/user/mo), you get Defender for Business included at no extra cost. Endpoint detection and response, threat analytics, and automated investigation. For M365 shops, this is genuinely free enterprise-grade security.
- EDR: Full endpoint detection and response
- Automation: Automated threat investigation
- Platforms: Windows, macOS, iOS, Android
- Catch: Requires M365 Business Premium subscription
ClamAV $0 - Open Source
ClamAV is a free, open-source antivirus engine used by millions of servers. It excels at email gateway scanning and file server protection. Not a full endpoint solution, but free and effective for specific use cases.
- Use case: Email scanning, file server protection
- Updates: Community-maintained signature database
- Platforms: Linux, Windows, macOS
- Catch: No real-time protection, no EDR
Tier 2: Under $5/Endpoint/Month
Bitdefender GravityZone ~$3/endpoint/mo
Bitdefender GravityZone Business Security starts at approximately $3/endpoint/month (billed annually). You get anti-malware, web filtering, firewall, device control, and a cloud management console. The best value in paid endpoint security.
- Protection: Anti-malware, ransomware, phishing
- Management: Cloud console, remote deployment
- Features: Web filtering, USB control, firewall
- Price: ~$3/endpoint/mo billed annually
ESET PROTECT Entry ~$4/endpoint/mo
ESET PROTECT Entry at approximately $4/endpoint/month provides endpoint protection, cloud management, and multi-platform support. Known for lightweight agents that do not slow down machines - important for businesses running older hardware.
- Performance: Lightest agent in the market
- Management: Cloud or on-premise console
- Platforms: Windows, macOS, Linux, Android
- Price: ~$4/endpoint/mo billed annually
Tier 3: $5-$10/Endpoint/Month
SentinelOne Singularity Core ~$6/endpoint/mo
SentinelOne at approximately $6/endpoint/month gives you AI-powered EDR that competes with CrowdStrike at half the price. Autonomous threat detection, automated remediation, and rollback capabilities. The best budget EDR available.
- AI detection: Behavioral and static AI engines
- Remediation: Automated rollback and quarantine
- EDR: Full endpoint detection and response
- Price: ~$6/endpoint/mo
Complete Pricing Table
| Tool | Price/Endpoint/Mo | EDR | Cloud Console | Best For |
|---|---|---|---|---|
| MS Defender | $0 (with M365) | Yes | Yes | M365 shops |
| ClamAV | $0 | No | No | Servers |
| Bitdefender | ~$3 | Add-on | Yes | Best value |
| ESET | ~$4 | Add-on | Yes | Light agent |
| SentinelOne | ~$6 | Yes | Yes | Budget EDR |
Bottom Line
If you use Microsoft 365, Defender for Business is included and genuinely good. The cheapest standalone protection is Bitdefender GravityZone at ~$3/endpoint. For AI-powered EDR on a budget, SentinelOne at ~$6/endpoint competes with solutions costing 3x more.
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