Industrial Internet of Things (IIoT) Security - Market Share Analysis, Industry Trends & Statistics, Growth Forecasts (2026-2031)

The industrial internet of things (IIoT) security market size is projected to be USD 12.14 billion in 2025, USD 14.36 billion in 2026, and reach USD 33.26 billion by 2031, growing at a CAGR of 18.29% from 2026 to 2031. This report is Segmented by Component (Solutions and Services), Security Type (Network Security, Device and Endpoint Security, Application and API Security, and More), Deployment Mode (On-Premises, and More), End-User Industry (Industrial Manufacturing, Energy and Utilities, Oil and Gas, and More), and Geography. The Market Forecasts are Provided in Terms of Value (USD).

Global Industrial Internet Of Things (IIoT) Security Market Trends and Insights

IT and OT Convergence Expanding the Attack Surface

The industrial internet of things (IIoT) security market is being pushed higher by the simple fact that most industrial environments no longer keep enterprise systems and plant systems fully separate. Palo Alto Networks, Siemens, and Idaho National Laboratory documented 20 million unique industrial devices exposed to the public internet in 2024, which shows how much of the operating environment is now reachable from outside the plant boundary. The same research found that adversaries often remained in view for extended periods before active exploitation, which means monitoring gaps now matter as much as perimeter controls in the industrial internet of things (IIoT) security market. Buyers are therefore putting more weight on cross-domain visibility, identity controls, and segmentation policies that can follow assets across IT systems, OT zones, and hybrid cloud links. This is also changing purchase logic because operators increasingly prefer unified protection layers that can track movement from office networks into engineering workstations and then toward control assets. As a result, the industrial internet of things (IIoT) security market is favoring vendors that can show protocol awareness, rapid asset mapping, and continuous threat monitoring in one operating model.

Rising IIoT Device Density Across Connected Plants

The industrial internet of things (IIoT) security market is also benefiting from the fast spread of sensors, gateways, and connected edge devices across production environments. Palo Alto Networks and Idaho National Laboratory recorded more than 110 million observations of OT devices exposed to the internet in 2024, which reflected how quickly connected assets were accumulating across manufacturing, energy, and utilities. This growing device base creates persistent inventory gaps because many assets are added close to operations, while central IT and security teams may not update visibility tools at the same pace. TXOne Networks reported that 60% of organizations experienced at least 1 OT security incident in 2025, and 88% increased OT security spending by more than 10%, which shows how device sprawl is turning directly into buying urgency for the industrial internet of things (IIoT) security market. Rockwell Automation also found in 2025 that 38% of manufacturers planned to use existing operational data to improve cybersecurity, which suggests that asset intelligence is becoming a starting point for defense design rather than a later improvement step. The result is that the industrial internet of things (IIoT) security market is moving beyond isolated point products and toward broader discovery, monitoring, and response tools that can keep pace with changing plant asset maps.

High Retrofit Costs for Legacy Controllers and Field Devices

The industrial internet of things (IIoT) security market still faces a basic obstacle because many industrial sites continue to rely on equipment designed for long service lives and limited native security. TXOne Networks found in 2026 that 54% of industrial organizations cited compatibility with legacy equipment as the leading barrier to security adoption, while 38% still pointed to high replacement costs as a constraint. This helps explain why many operators prefer protection-in-place strategies instead of full controller replacement, especially where production lines cannot tolerate prolonged shutdowns. The input data also showed full PLC replacement costs of EUR 30,000 to EUR 150,000 (USD 33,000 to USD 165,000) and complete production line retrofits at EUR 3 million (USD 3.3 million) per line, so cost pressure remains substantial even before downtime is factored in. TXOne also noted in 2025 that strategic life extension can avoid USD 2 million to USD 5 million in costs per legacy system, which is why buyers in the industrial internet of things (IIoT) security market often choose virtual patching, network controls, and isolation tools before they choose hardware renewal. The result is slower adoption in brownfield facilities, even when management recognizes that legacy exposure is widening relative to newer, security-by-design sites.

Other drivers and restraints analyzed in the detailed report include:

• Regulatory Pressure on Critical Infrastructure Security
• Cyber Insurance Underwriting Requiring Stronger OT Controls
• OT Cybersecurity Skills Shortage

Segment Analysis

Solutions held 57.35% of revenue in 2025, which kept this segment at the center of the industrial internet of things (IIoT) security market because most programs still begin with visibility, segmentation, detection, and vulnerability management tools. Buyers usually start with core controls because brownfield facilities need an immediate view of what is connected before they can set policy, tune alerts, or isolate risky paths between enterprise networks and plant systems. In the cybersecurity for industrial IoT industry, early spend continues to favor asset-discovery platforms, protocol-aware monitoring, and industrial intrusion detection because these tools establish the operating picture that later services depend on. The solutions base also remains important because many regulated operators still want direct control over architecture decisions and tool placement inside critical facilities.

Services are projected to expand at a 20.21% CAGR through 2031, and that stronger pace reflects the growing need for managed detection, incident response, compliance support, and remote SOC coverage. Dragos reported in 2026 that comprehensive OT visibility reduced incident dwell time from an industry average of 42 days to 5 days, which gives service-led models a clear performance argument when operators need faster outcomes. This is why the industrial internet of things (IIoT) security market is steadily moving toward contracts that combine technology, monitoring, and response into a recurring service relationship. In the cybersecurity for industrial IoT industry, that shift also puts pressure on product-only vendors because buyers increasingly want proof that controls can be operated effectively, not just installed. Over time, solutions should remain the larger revenue base, but services are likely to capture a rising share of new spending because staffing pressure and accountability demands continue to grow.

Network security held 41.69% share in 2025, and it accounted for 41.69% of the industrial internet of things (IIoT) security market share because industrial operators still prioritize segmentation, firewalling, and internal traffic visibility before many other control layers. That position reflects the structure of legacy OT environments, where separating zones and monitoring east-west traffic remains essential to limit movement from IT systems into control networks. Palo Alto Networks and its research partners showed that public internet exposure across industrial devices remained large in 2024, which supports continued spending on network-aware defenses in the industrial internet of things (IIoT) security market. Network security also retains budget priority because it can reduce risk across many asset classes at once, from engineering workstations to remote access paths and edge gateways.

Cloud security is projected to grow at a 21.26% CAGR through 2031, which shows how much the industrial internet of things (IIoT) security market is shifting toward cloud-connected SCADA, remote monitoring, identity services, and hosted analytics. As operators move more monitoring and management functions into hybrid environments, they need controls that can protect data flows, credentials, and application links outside the plant boundary. Dragos noted in 2026 that adversaries were actively targeting deeper operational layers, including engineering workstations and configuration data, which supports a stronger demand for controls that can follow identities and workloads across connected environments. Application security, identity and access management, data security, and continuous threat monitoring are also gaining ground because buyers increasingly want layered control rather than single-point defenses. The industrial internet of things (IIoT) security market, therefore, continues to favor network security in the base year, while faster cloud adoption is pulling newer spending toward distributed defense models.

Complete Report Scope:

• By Component
  • Solutions
  • Services
• By Security Type
  • Network Security
  • Device and Endpoint Security
  • Application and API Security
  • Identity and Access Security
  • Data Security and Privacy
  • Security Monitoring and Threat Detection
• By Deployment Mode
  • On-Premises
  • Cloud
  • Hybrid
• By End-User Industry
  • Industrial Manufacturing
  • Energy and Utilities
  • Oil and Gas
  • Transportation and Logistics
  • Healthcare and Life Sciences
  • Other End-User Industries
• By Geography
  • North America
    • United States
    • Canada
    • Mexico
  • South America
    • Brazil
    • Argentina
    • Rest of South America
  • Europe
    • Germany
    • United Kingdom
    • France
    • Italy
    • Spain
    • Russia
    • Rest of Europe
  • Asia-Pacific
    • China
    • Japan
    • India
    • South Korea
    • Australia and New Zealand
    • Rest of Asia-Pacific
  • Middle East
    • Saudi Arabia
    • United Arab Emirates
    • Turkey
    • Rest of the Middle East
  • Africa
    • South Africa
    • Egypt
    • Rest of Africa

Geography Analysis

North America held 38.25% of the industrial internet of things (IIoT) security market share in 2025, which kept it as the largest regional contributor. The region benefits from a dense installed base of critical infrastructure and a procurement environment where industrial owners are already familiar with OT-specific tools and managed security services. FERC approval of CIP-015-1 in July 2025 widened mandatory internal monitoring requirements, which strengthened the compliance case for continued spending across electricity and related critical systems. FERC also pushed for broader supply chain protections in September 2025, which added to the need for stronger control across a wider set of cyber assets. Dragos also identified North America as carrying the highest concentration of industrial OT cyber financial exposure, which helps explain why buyers in the industrial internet of things (IIoT) security market often prioritize detection depth, response support, and vendor consolidation.

Asia-Pacific is projected to expand at a 23.87% CAGR through 2031, which makes it the fastest-growing regional block in the industrial internet of things (IIoT) security market size. Growth is being supported by rapid industrial digitalization, a large manufacturing base, and an operating environment where many plants are increasing connectivity faster than they can build specialized OT security teams. In Japan, METI published OT Security Guidelines for semiconductor device factories in 2025, which tied plant security more closely to recognized standards and raised the profile of OT cyber requirements in a strategic manufacturing sector. This kind of sector-specific rulemaking matters because it influences procurement language, audit expectations, and supplier readiness across wider production networks. The result is that Asia-Pacific is becoming a high-growth part of the industrial internet of things (IIoT) security market, not only because of rising exposure, but also because operators are formalizing security requirements while managed service demand continues to increase.

Europe remains another major demand center in the industrial internet of things (IIoT) security market because energy, manufacturing, transport, and digital infrastructure operators face broad security and reporting obligations. Germany continues to stand out within Europe because its industrial base creates sustained demand for OT visibility, segmentation, and control-system-aware monitoring. The United Kingdom is also relevant because OT security guidance has moved closer to internationally recognized control frameworks, which supports more standardized buying criteria across industrial operators. South America, the Middle East, and Africa still represented smaller revenue pools, but they remained important growth areas where state-owned energy and utilities operators often carry high exposure with limited internal specialist capacity. That pattern keeps the industrial internet of things (IIoT) security market open to managed service models in those regions, especially where brownfield facilities need practical protection without full infrastructure replacement.

List of Companies Covered in this Report:

• Claroty Ltd.
• Nozomi Networks Inc.
• Dragos Inc.
• Cisco Systems, Inc.
• Honeywell International Inc.
• Siemens AG
• Schneider Electric SE
• Rockwell Automation, Inc.
• ABB Ltd.
• Fortinet, Inc.
• Palo Alto Networks, Inc.
• Forescout Technologies, Inc.
• Tenable Holdings, Inc.
• IBM Corporation
• Armis, Inc.
• TXOne Networks Inc.
• Radiflow Ltd.
• Waterfall Security Solutions Ltd.
• Microsoft Corporation
• Check Point Software Technologies Ltd.

Additional Benefits:

• The market estimate (ME) sheet in Excel format
• 3 months of analyst support