Radiflow iSID

Paid#9 of 19 in OT and ICS Security Monitoring Software

Radiflow iSID: A broad OT monitoring platform for tracking assets, PLC behavior, threats, and work orders. Ranked #9 of 19 in OT and ICS Security Monitoring Software by our editors (8.2/10); pricing: Pricing on request; best for OT teams monitoring PLC behavior and work orders.

8.2/10★★★★☆Editor score

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At a glance

• Editor score
  8.2 / 10
• Pricing
  Pricing on request
• Best for
  OT teams monitoring PLC behavior and work orders
• Deployment
  Hybrid
• Founded
  2009
• Facts checked
  20 Sep 2026

• Where it wins

  • Passively discovers OT assets and models network communications
  • Monitors PLC changes, operational behavior, policies, and work orders
  • Supports Modbus, CIP, DNP3, and IEC 104 inspection

• Where it doesn't

  • Pricing requires contacting sales
  • Broad monitoring may exceed narrow visibility needs
  • Multi-site management depends on the iCEN platform

Our verdict on Radiflow iSID

Radiflow iSID is an industrial threat detection and OT security monitoring product for industrial companies, critical infrastructure operators, and managed security service providers. It passively monitors OT network traffic, creates asset inventories, models network topology and communications, learns normal behavior, and identifies anomalies, threats, configuration changes, and policy violations. Its focus suits OT teams that need visibility into PLC behavior, industrial protocols, and maintenance activity across operational environments.

Pricing uses a contact-sales model. Deployment can be central, local, or combined across sites, with web, self-hosted, and API access listed as supported platforms. iSID connects with Cisco Identity Services Engine, SIEM platforms, SCADA systems, zenon, REST API, and Syslog. Multiple iSID instances can be managed centrally through Radiflow’s iCEN platform, making the product relevant for organizations coordinating monitoring across more than one operational site.

The standout capability is the combination of passive network monitoring with operational context. iSID inspects industrial protocols, detects behavioral anomalies, monitors PLC configuration changes and operational behavior, evaluates network links and commands against policies, and tracks maintenance work orders. This breadth can help teams connect network events with expected engineering activity instead of treating every alert in isolation. Organizations seeking a unified view of assets, communications, threats, PLC changes, and work orders should consider iSID. Teams that need only a narrowly focused asset inventory or a simple network-monitoring tool may prefer a more limited product.

Your product? Our editors can test Radiflow iSID in depth and publish a review, labelled as paid · from $149/mo →

Radiflow iSID pricing

Radiflow iSID fact sheet

Radiflow iSID integrations

Radiflow iSID lists 6 integrations on its own site.

• Cisco Identity Services Engine (ISE)
• SIEM platforms
• SCADA systems
• zenon
• REST API
• Syslog

Alternatives to Radiflow iSID

• DPDragos PlatformA broad OT monitoring platform for threat intelligence, vulnerability management, and response.9.4
• ACArmis Centrix for OT/IoT SecurityA broad agentless platform for discovering, monitoring, and prioritizing OT/IoT risk.9.3
• Nozomi Networks PlatformBroad monitoring, discovery, anomaly detection, and integrations for mixed OT and IoT estates.9.2

See all Radiflow iSID alternatives →

Featured on iTechGuides

Radiflow iSID is listed in our OT and ICS Security Monitoring Software directory. Add the badge to your site — it links back to this page.

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Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026

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Last updated 7 Oct 2026 · How we research and update