Microsoft Defender for Business vs Tenable One OT Exposure

Microsoft Defender for Business has no write-up on Specifiction yet; its figures are above.

Tenable One OT Exposure is web-based software for operational technology security. It provides passive monitoring and OT asset discovery, giving organizations visibility into network activity and connected OT assets. Supported protocols are Modbus, Modbus UMAS, Modbus MODICON, CIP, PROFINET, DNP3, IEC 60870-5-104, MMS, S7/S7+, and IEC 61850. The product also supports SIEM integration for connecting OT observations with security-information workflows. Tenable lists two purchasing routes: a standalone subscription and a perpetual license with maintenance. Both require one license for each detected IP address, while prices are available on request. The software is available through the web. Tenable was founded in 2002 and is headquartered in Columbia, Maryland, United States. The central operating model is passive observation rather than active scanning, paired with discovery of OT devices and protocol-aware visibility. Organizations considering it need to account for licensing tied to detected IP addresses when estimating deployment scope and discussing either the subscription or perpetual-maintenance option with Tenable.