Armis Centrix for OT/IoT Security vs OTDefend

Armis Centrix for OT/IoT Security is a paid web platform for monitoring operational technology and discovering OT assets. Its listed monitoring approach is passive, and its discovery capability focuses on identifying OT assets. The platform supports S7Comm, CIP, SNMP, BACnet, Modbus, WMI, HTTP, DNP3, IEC 60870-5-104 and Profinet protocols. It also offers SIEM integration for organizations that connect OT or IoT security information with a security information and event management system. Armis was founded in 2015 and is headquartered in San Francisco, California, USA. Centrix is available through the web, with pricing supplied on request. The published capability set is limited to passive monitoring, OT asset discovery, the named protocol coverage and SIEM integration, so buyers can compare those specifics with the protocols and security workflows in their environments before contacting Armis.

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.