Critical infrastructure organisations can no longer depend on IT-centric security models as ransomware and cyber-physical attacks increase on a global scale. A distinct kind of security is required for operational technology (OT) environments, one that combines rigorous technical testing, practical simulation, and regulatory compliance.
To help you choose the right OT security partner, we’ve compiled a curated list of the best OT security companies. These providers specialize in ICS, SCADA, and other complex OT ecosystems across sectors like energy, manufacturing, water treatment, and transportation.
How We Chose These OT Security Leaders
We assessed vendors across the following dimensions:
- ICS/SCADA Security Expertise: Real-world knowledge of control systems, PLCs, HMIs, and proprietary protocols.
- Red Team / Simulation Testing: Ability to emulate nation-state and APT-style attacks on OT environments.
- Compliance Experience: Familiarity with NIST CSF, IEC 62443, NERC CIP, and industry-specific mandates.
- Client Success: Demonstrated success with critical infrastructure organizations.
- Operational Resilience Focus: Emphasis on uptime, process continuity, and safety.
1. Bluefire Redteam (Best for Simulation-Based OT Defense Testing)
Elite-level red, blue, and purple team testing specifically designed for ICS/SCADA environments is provided by Bluefire Redteam. Among their offerings are threat emulation within industrial networks, lateral movement detection, and attack path simulation.
Key Differentiators:
- Physical breach simulation combined with specialised ICS/OT Red Teaming
- MITRE ATT&CK for ICS is the foundation of adversary emulation.
- Customized incident response drills and cyber tabletop exercises
- Expertise across energy, utilities, smart cities, and manufacturing sectors
Certifications: ISO 27001, NIST-aligned, IEC 62443 familiar
Client Fit: Mid-market to enterprise critical infrastructure operators
2. Dragos (Best for Industrial Threat Intelligence)
Dragos is a leader in asset visibility and threat intelligence tailored to ICS. Their platform combines expert-guided investigation workflows designed for OT networks with real-time detection.
3. Nozomi Networks (Best for OT Network Visibility & Anomaly Detection)
Continuous monitoring and risk visualisation across industrial networks are areas in which Nozomi Networks excels. Scalable, AI-powered detection is provided by their Guardian platform.
OT Security Company Comparison Table
| Company | Best For | Simulation Testing | Compliance Alignment | ICS/OT Experience |
|---|---|---|---|---|
| Bluefire Redteam | Simulation-Based Defense | ✅ | ✅ | ✅ |
| Dragos | Threat Intel & IR | ✅ | ✅ | ✅ |
| Nozomi Networks | Network Visibility | ❌ | ✅ | ✅ |
What to Look for in an OT Security Partner
- Hands-on Experience with OT Protocols & Devices
- Simulation-based Testing, Not Just Scanning
- Proven Success in Your Industry Vertical
- Ability to Train, Not Just Test
- Ongoing Risk Management & Governance Guidance
Ready to Stress-Test Your OT Defenses?
For industrial networks, Bluefire Redteam specialises in both offensive and defensive simulations. To find out how our attack path mapping and emulation services can lower your most exploitable OT risks, schedule a 30-minute strategy session.
