Loading...
GRASSMARLIN is a free operational technology asset discovery tool. Athena Dynamics RAD is a commercial operational technology asset discovery tool by Athena Dynamics. Compare features, ratings, integrations, and community reviews side by side to find the best operational technology asset discovery fit for your security stack.
Based on our analysis of NIST CSF 2.0 coverage, core features, integrations, company size fit, here is our conclusion:
Operations teams defending critical infrastructure without dedicated ICS/SCADA visibility should start with GRASSMARLIN; its passive network mapping gives you topology sight-lines without touching production systems, which matters when downtime costs six figures per hour. The tool is free and runs on commodity hardware, so deployment friction is nearly zero for teams of any size. The tradeoff is real: GRASSMARLIN maps what exists but doesn't actively hunt for misconfigurations or lateral movement, so it's a foundation layer, not a standalone defense.
Mid-market and enterprise maritime operators need RAD because it discovers OT assets across hybrid IT/OT networks without requiring onboard hardware or disrupting vessel systems, a constraint that kills most traditional discovery tools in this domain. The ClassNK certification and passive scanning with 60-minute active phases prove the vendor understands maritime ops; E26 compliance support closes a real gap in the category. Skip this if your fleet runs purely air-gapped networks or if you need NIST ID.RC recovery capabilities built in; RAD prioritizes asset visibility and continuous monitoring over incident response orchestration.
Passively maps and visually displays ICS/SCADA network topology for network security
Remote maritime IT/OT asset discovery & vuln assessment via software agent.
Access NIST CSF 2.0 data from thousands of security products via MCP to assess your stack coverage.
Access via MCPNo reviews yet
No reviews yet
Explore more tools in this category or create a security stack with your selections.
Common questions about comparing GRASSMARLIN vs Athena Dynamics RAD for your operational technology asset discovery needs.
GRASSMARLIN: Passively maps and visually displays ICS/SCADA network topology for network security..
Athena Dynamics RAD: Remote maritime IT/OT asset discovery & vuln assessment via software agent. built by Athena Dynamics. headquartered in Singapore. Core capabilities include Remote IT and OT asset discovery via lightweight software agent — no onboard hardware required, Passive network scanning with no observable impact on vessel OT systems (ClassNK certified), Vulnerability assessment and prioritisation for all discovered assets..
Both serve the Operational Technology Asset Discovery market but differ in approach, feature depth, and target audience.
Get strategic cybersecurity insights in your inbox