The closest GRASSMARLIN alternatives are Armis Threat Detection and Analysis, Dragos Platform Asset Visibility and Athena Dynamics RAD. Picking a GRASSMARLIN alternative comes down to fit: OT Asset Discovery coverage, your environment, your integrations and your budget. So each option below shows what it covers, how it deploys, its pricing model and the company behind it.
10 alternativesClosest matches: Armis Threat Detection and Analysis, Dragos Platform Asset Visibility, Athena Dynamics RADPage updated Nov 2026
The product
Passively maps and visually displays ICS/SCADA network topology for network security
GRASSMARLIN is a free OT Asset Discovery solution. The closest matches by shared tags and NIST CSF 2.0 coverage are Armis Threat Detection and Analysis, Dragos Platform Asset Visibility, Athena Dynamics RAD, Vantelis Data Acquisition Platform, and Redinent Deep Asset Intelligence. All 10 alternatives on this page are ranked the same way.
Hi Citrix. Hide VPNs. Hide Windows on a LAN. Knocknoc solves this. Just in time identity linked allow-listing. DIY, on-premise or SaaS. Prevent attacks fast.
VisitThese 8 solutions overlap most with GRASSMARLIN. Each row says what the product does and, when the overlap is big enough, which capabilities it shares.
OT/IoT asset discovery and threat detection platform for industrial environments
Key features: 10 listed. See them on the Armis Threat Detection and Analysis page.
View Armis Threat Detection and AnalysisArmis Threat Detection and Analysis alternativesGRASSMARLIN vs Armis Threat Detection and Analysis
OT/IoT asset discovery and threat detection platform for industrial environments
OT asset discovery and inventory platform for industrial environments
Remote maritime IT/OT asset discovery & vuln assessment via software agent.
Agentless OT data acquisition platform for passive asset & traffic visibility.
Cloud-based IoT/OT asset intelligence engine for device profiling and OEM detection.
Database of 1M+ xIoT/OT/IoMT device profiles for CPS asset coverage.
Active polling add-on for OT/IoT asset discovery and configuration data
Network device & service visibility platform for ISPs using device fingerprinting.
Physical security device visibility, inventory, and vulnerability mgmt platform.
Common questions when weighing alternatives to GRASSMARLIN.
The closest matches to GRASSMARLIN by shared tags and NIST CSF 2.0 coverage are Armis Threat Detection and Analysis, Dragos Platform Asset Visibility, Athena Dynamics RAD, Vantelis Data Acquisition Platform, and Redinent Deep Asset Intelligence. All of them are OT Asset Discovery products.
This page shows 10 alternatives to GRASSMARLIN, all in the OT Asset Discovery category. Each one is matched on shared tags and NIST CSF 2.0 areas, and the closest matches rank first.
GRASSMARLIN is a free OT Asset Discovery product. You can use it at no cost. Only commercial alternatives are listed here. Free and open source products are under /free.
GRASSMARLIN is a OT Asset Discovery product in the Cyber-Physical Security category. You can compare it with the 10 other OT Asset Discovery products on this page.
OT asset discovery and inventory platform for industrial environments
Key features: 10 listed. See them on the Dragos Platform Asset Visibility page.
View Dragos Platform Asset VisibilityDragos Platform Asset Visibility alternativesGRASSMARLIN vs Dragos Platform Asset Visibility
Remote maritime IT/OT asset discovery & vuln assessment via software agent.
Key features: 8 listed. See them on the Athena Dynamics RAD page.
View Athena Dynamics RADAthena Dynamics RAD alternativesGRASSMARLIN vs Athena Dynamics RAD
Agentless OT data acquisition platform for passive asset & traffic visibility.
Key features: 8 listed. See them on the Vantelis Data Acquisition Platform page.
View Vantelis Data Acquisition PlatformVantelis Data Acquisition Platform alternativesGRASSMARLIN vs Vantelis Data Acquisition Platform
Cloud-based IoT/OT asset intelligence engine for device profiling and OEM detection.
Key features: 8 listed. See them on the Redinent Deep Asset Intelligence page.
View Redinent Deep Asset IntelligenceRedinent Deep Asset Intelligence alternativesGRASSMARLIN vs Redinent Deep Asset Intelligence
Database of 1M+ xIoT/OT/IoMT device profiles for CPS asset coverage.
Key features: 6 listed. See them on the Phosphorus xIoT Global Device Network page.
View Phosphorus xIoT Global Device NetworkPhosphorus xIoT Global Device Network alternativesGRASSMARLIN vs Phosphorus xIoT Global Device Network
Active polling add-on for OT/IoT asset discovery and configuration data
Key features: 8 listed. See them on the Nozomi Networks Nozomi Smart Polling page.
View Nozomi Networks Nozomi Smart PollingNozomi Networks Nozomi Smart Polling alternativesGRASSMARLIN vs Nozomi Networks Nozomi Smart Polling
Network device & service visibility platform for ISPs using device fingerprinting.
Key features: 9 listed. See them on the SAM Intelligence page.
View SAM IntelligenceSAM Intelligence alternativesGRASSMARLIN vs SAM Intelligence
No OT Asset Discovery shortlist yet. This is the closest one.
Updated 2026-11-02
See the shortlist