Best IoT Security Tools

Armis provides agentless IoT security for unmanaged and hard-to-agent devices across enterprise, healthcare, industrial, and critical infrastructure environments. Its Centrix platform uses passive network sensing to discover connected assets, identify device type and behavior, and flag risk from unsupported operating systems, weak configurations, and suspicious communications. In this category, Armis is best suited for organizations that need visibility into IoT, OT, IIoT, and medical devices without installing agents or actively scanning devices that may be fragile or unavailable for software deployment. Adjacent exposure-management features exist, but the IoT security value centers on discovery, monitoring, and response for connected devices.

Cynerio provides healthcare-focused IoT security for hospitals and other healthcare delivery organizations. Its platform discovers connected medical and IoT devices, classifies them, learns normal communication patterns, and identifies anomalous or malicious activity on the network. The product is strongest in clinical environments where device criticality, patient-care workflows, and uptime constraints matter. It is best suited for healthcare security teams that need device visibility, risk context, and policy enforcement for medical devices without relying on endpoint agents.

Exein provides device-level security for embedded systems and IoT devices using an edge AI-driven approach. The platform embeds protection directly into the device firmware to detect and block threats locally without requiring constant cloud connectivity. It replaces legacy, perimeter-based IoT security with kernel-level observability and real-time response capabilities for manufacturers and operators of smart devices.

Forescout’s IoT Security offering is an agentless device visibility and control platform for unmanaged IoT, OT, and IoMT environments. It identifies devices as they connect, classifies them by type and function, detects weak or factory-default credentials, monitors communications for anomalous behavior, and automates policy actions such as segmentation, quarantine, and least-privilege network access. The product is best suited for enterprises that need passive discovery and enforcement across mixed IT/OT networks, including healthcare, manufacturing, building automation, and critical infrastructure. Forescout also offers adjacent OT and network access control capabilities, but the IoT Security scope centers on device visibility, classification, and containment.

Fortinet’s FortiGate line is the company’s Firewall/NGFW offering, covering stateful firewalling, application control, IPS, web filtering, SSL/TLS inspection, and threat-intelligence-backed blocking. It is widely deployed from branch and edge sites to enterprise perimeter and segmentation use cases, with hardware, virtual, and cloud form factors managed through the same Fortinet policy stack. Buyers typically choose it when they need firewall enforcement plus inline inspection and VPN capability in one appliance, especially in environments that already use FortiGuard threat feeds or the Fortinet Security Fabric. Adjacent products include SD-WAN and ZTNA, but those are not the core scope here.

Genian NAC is a 4th generation Network Access Control solution from Genians that delivers real-time visibility into IP-enabled devices using Layer 2 Network Sensors connected to broadcast domains, supporting legacy networks without infrastructure changes. It profiles endpoints by over 500 criteria, including EOS/EOL status, vulnerabilities, and manufacturer details, enforcing policies via multi-layered methods like ARP control, built-in RADIUS for 802.1x, DHCP server, SPAN-based TCP reset, and agent-based NIC/power control. Ideal for enterprises with heterogeneous IT/IoT/OT environments seeking non-disruptive surveillance and dynamic compliance enforcement.

Microsoft Defender for Cloud is a multicloud CSPM platform that provides continuous security posture assessment across Azure, AWS, and GCP. It delivers agentless vulnerability scanning, misconfiguration detection, and compliance monitoring against industry benchmarks (CIS, NIST, ISO, PCI-DSS). The platform generates hardening recommendations ranked by risk and includes attack path analysis to identify exploitable chains. Defender for Cloud serves enterprises managing hybrid and multicloud infrastructure seeking unified posture visibility and compliance reporting.

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Palo Alto Networks is a major vendor in the Firewall / NGFW market, best known for PAN-OS-based next-generation firewalls and Cloud NGFW. Its firewalls combine application-aware policy, user-based controls, and threat prevention to inspect traffic, including encrypted sessions, and block known and unknown threats. It fits enterprises that need granular segmentation, internet edge protection, and consistent policy across physical and cloud deployments. Adjacent offerings exist, but the core firewall line remains centered on network traffic control, inspection, and prevention.

Phosphorus provides an agentless IoT security platform for connected cyber-physical devices, including IoT, OT, IIoT, and IoMT assets. In this category, it focuses on device discovery, posture assessment, and active remediation rather than passive monitoring alone. The platform is built for enterprises that need to inventory unmanaged devices, identify weak credentials, firmware and certificate issues, and enforce hardening actions across heterogeneous device types. It is best suited for security teams responsible for connected device risk in hospitals, industrial environments, and large enterprise networks.

Redefining the way organizations manage and secure IoT devices at scale.

TXOne Networks is an OT-native cybersecurity vendor focused on protecting industrial and IoT-connected environments such as factories, utilities, and medical/production sites. In the IoT Security scope, its portfolio centers on device and network protection for operational assets, including inspection of removable media, endpoint defense for legacy and modern OT systems, and inline network controls for industrial protocols. It is best suited for organizations that need to secure brownfield OT/IoT environments without disrupting operations. TXOne also sells adjacent OT security orchestration and threat intelligence components, but its IoT security value is primarily in asset, endpoint, and network protection.

wolfSSL is an embedded cryptography vendor best known for its wolfCrypt engine, wolfSSL TLS library, and wolfHSM key-management framework. In the Encryption & Key Management category, it provides software for protecting keys, offloading sensitive cryptographic operations to HSMs, and supporting standards such as PKCS#11 and AUTOSAR SHE. It is strongest for embedded, automotive, RTOS, and constrained-device environments where small footprint, portable C code, and hardware-backed key handling matter. Adjacent products include TLS, SSH, MQTT, and boot/security tooling, but the core fit here is cryptography and key lifecycle control.