Microsoft Defender for Business vs OTDefend
Microsoft Defender for Business
microsoft.comOTDefend
otdefend.comSide by side
| Figure | Microsoft Defender for Business | OTDefend |
|---|---|---|
| Price from | $0.25/mo | — |
| Free plan | — | — |
| Free trial | Yes | Yes |
| Open source | — | — |
| Web | — | Yes |
| Windows | Yes | Yes |
| macOS | Yes | — |
| Linux | — | Yes |
| iOS | Yes | — |
| Android | Yes | — |
| API | Yes | Yes |
| Self-hosted | — | Yes |
| Plans published | 4 | 1 |
| Spec score · OT and ICS Security Monitoring Software | 8.6 (#1) | 8.3 (#4) |
| Headquarters | Redmond, Washington, United States | The demo page identifies Ankara, Turkey, while the newer contact page describes the global headquarters as appointment-only. |
| Integrations | The product integrates with Microsoft 365 Lighthouse and can work with remote monitoring and management tools and professional services automation software. | Listed connectors include Splunk, QRadar, CrowdStrike Falcon, Microsoft Defender, SentinelOne, Cortex XDR, FortiGate, Palo Alto, Check Point, ServiceNow and Jira. |
| Purpose | Microsoft Defender for Business is an endpoint security solution for small and medium-sized businesses with up to 300 users that helps protect devices from ransomware, malware, phishing, and other threats. | OTDefend provides passive OT/ICS monitoring, threat detection, vulnerability management and response for industrial environments. |
| Support | Microsoft's Defender for Business documentation provides a guide for getting help or contacting support. | Technical support is listed Monday through Friday, 9:00 AM to 6:00 PM, with emergency 24/7 coverage dependent on the support plan. |
| Vulnerability management | The product includes core vulnerability management capabilities to help identify and address weaknesses. | Passive CVE and ICS-CERT matching is prioritized using exposure, CVSS, Purdue criticality and known-exploited-vulnerability factors. |
Plans
Microsoft Defender for Business
- Microsoft Defender for Business$3 a month
- Microsoft Entra Internet Access$5 a month
- Microsoft Entra Suite$12 a month
- Microsoft Defender for Business$3 a year
In their own words
Microsoft Defender for Business
Microsoft Defender for Business has no write-up on Specifiction yet; its figures are above.
OTDefend
OTDefend provides passive monitoring, threat detection, vulnerability management, and response for industrial environments. Its network intrusion detection inspects more than 16 industrial protocols from a mirror or TAP port, and the maker says it does not inject traffic. Supported protocols include Modbus, S7comm, DNP3, EtherNet/IP, IEC-104, IEC 61850, PROFINET, EtherCAT, POWERLINK, CC-Link IE, OPC UA, BACnet, FINS, MELSEC, and HART-IP. A dependency-free Windows agent runs from Windows XP through Windows 11 and collects host inventory and intrusion-detection events. Detection combines network IDS signatures, Sigma analytics, and YARA signatures; the homepage states 688 rules. A built-in threat-intelligence store accepts TAXII 2.1 and STIX 2.1 feeds and checks indicators against live traffic. Deployment options include an offline Docker bundle, a .deb sensor, and a bootable appliance ISO. OTDefend lists SIEM and other security integrations, plus IEC 62443, NERC CIP, and NIS2 reporting with exportable PDFs. Its design includes per-tenant isolation, role-based access, an active/standby core, and one-way sensors for data-diode segments. Pricing is on request.