Open-source tools like Suricata, Zeek, and Wireshark are foundational to OT security, but the real cost isn't the software.
This white paper reveals:
Free White Paper · 1 Min Read
Open Source Doesn't Mean Free in OT Security
Download our free white paper to discover the true costs of open-source OT security tools, and a smarter hybrid approach.
OT security leaders will learn where open-source tools save money, and where they quietly drain resources.
Download White Paper
1
Where open-source tools shine in OT security, and where they struggle.
2
The often overlooked operational costs of maintaining open source in industrial environments.
3
Why a hybrid approach (open source plus commercial support) can lower your total cost and risk.
For CISOs, these hidden tool costs can translate into budget overruns and security gaps. For OT analysts, they mean constant fine-tuning and burnout.
The Numbers Tell the Story
96%
of organizations increased or maintained their use of open-source software in the past year.
7/10
organizations say open source is critical for mission-critical workloads.
32%
of surveyed organizations report their security tools are NOT open source.
Source: 2025 State of Open Source Report
Open Source Is Powerful, But OT Changes the Equation
Open-source cybersecurity tools have become essential for gaining visibility into OT environments where proprietary protocols, legacy systems, and limited monitoring capabilities are the norm. For organizations starting from near-zero visibility, open source provides a fast and flexible starting point.
But "free" tools come with real costs. In OT environments, open source demands:
- Specialized protocol expertise
- Continuous tuning and rule maintenance
- Deep packet analysis and detection engineering
- Ongoing upkeep with no guaranteed support
For teams already facing budget constraints and a shortage of OT cybersecurity talent, these hidden costs can often exceed commercial solutions.
Benefits and Risks of Open Source in OT
Benefits
Rapid Access to Visibility
An immediate foundational baseline for teams starting from near-zero monitoring. Imperfect coverage still beats none.
Fine-Grained Control
Engineers can write precise rules, tune alerts, and remove irrelevant detections instead of working around a noisy black box.
Proven Capability
Suricata, Zeek, Wireshark, and YARA are best-in-class. Many commercial products integrate these engines directly.
Low Cost of Entry
Free to download, letting teams test, experiment, and deploy without a licensing barrier.
Risks
Personnel Overhead
Detection engineering, protocol fluency, PCAP analysis, and sensor administration all require dedicated expertise.
Documentation Gaps
Incomplete docs and no guaranteed support channel, just community forums and personal investigation.
Maintenance Risk
Priorities shift with funding and contributors. Even publicly funded projects can stagnate or lose direction.
Innovation Bottlenecks & Reliability
New features can take years to land, and protocol coverage gaps can introduce blind spots in OT contexts.
The Strategic Tradeoff: Open vs. Closed Source
The decision isn't binary. It comes down to where organizations want to invest limited resources.
- Pure Open Source: maximum flexibility, high overhead. Best for teams with deep expertise and sufficient FTEs.
- Pure Commercial: low overhead, limited flexibility. Best for teams prioritizing operational simplicity and guaranteed support.
- Hybrid Approach: open-source cores enhanced with commercial layers that smooth integration, provide support, and deliver ongoing innovation.
The practical question isn't open vs. closed. It's whether your personnel-to-toolkit budget ratio actually matches your compliance, security, and operational requirements.
Valkyrie: Open-Source Strengths Without the Overhead
Valkyrie takes the best of open source, flexibility, visibility, proven detection engines, and builds the structure around it that organizations need.
- Commercial Grade Maintenance: continuous updates and support, so protocol coverage evolves as threats evolve.
- Expertise Built-In: our team carries the burden of tuning, customizing, and troubleshooting.
- Customer-Driven Roadmap: we prioritize development based on real user needs, not community politics or funding cycles.
- Production-Grade Reliability: hardened for industrial environments and backed by SLAs.
Comparison at a Glance
| Open-Source Tools | Commercial Tools | Hybrid Approach (Valkyrie) | |
|---|---|---|---|
| Acquisition Cost | Low upfront, high ongoing | High upfront or subscription | Low, transparent pricing |
| Personnel Overhead | High: detection engineering, protocol knowledge, admin | Low: vendor manages maintenance | Moderate: Valkyrie manages upkeep |
| Flexibility & Control | Maximum, if you have the expertise | Limited to vendor roadmap | High: tuned to customer needs |
| Support & Docs | Minimal: community forums | Strong: vendor SLAs | Guaranteed: support & onboarding |
| Maintenance Risk | High: funding/contributor shifts | Low, while contract is active | Low: continuous coverage updates |
| Innovation Speed | Slow: community approval cycles | Medium: commercial demand driven | Fast: customer-driven roadmap |
| OT Protocol Coverage | Uneven, often undocumented | Varies, gaps remain | Strong: OT-specific testing |
| Reliability | Variable: needs heavy tuning | High, if aligned to vendor design | High: validated by Valkyrie experts |
| Best Use Case | Teams with deep expertise, large FTE capacity | Teams wanting turnkey, low-maintenance | Teams wanting best-in-class visibility, lower burden |
Perforce Software Inc./OpenLogic, 2025 State of Open Source Report, 2025. IDC Research Inc., The State of Software Supply Chains, 2025.
Get the Full White Paper
See the complete breakdown of benefits, risks, and the hybrid approach, plus the full open-source vs. commercial vs. Valkyrie comparison table.
