GRASSMARLIN is a free OT asset discovery solution. SAM Intelligence is a commercial OT asset discovery solution by SAM Seamless Network. Features, integrations, deployment and the company behind each one, side by side.
Passively maps and visually displays ICS/SCADA network topology for network security
Network device & service visibility platform for ISPs using device fingerprinting.
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Based on what each listing shows: deployment, company size, price and open source.
GRASSMARLIN fits if you need to run it on your own servers, you are a mid-market company, you need a free product and you want an open-source product.
SAM Intelligence fits if you need both cloud and on-premises options.
Common questions when comparing GRASSMARLIN vs SAM Intelligence for OT asset discovery.
GRASSMARLIN: Passively maps and visually displays ICS/SCADA network topology for network security.
SAM Intelligence: Network device & service visibility platform for ISPs using device fingerprinting. Built by SAM Seamless Network.
The table above shows where their features, integrations, deployment and company size fit differ.
GRASSMARLIN is open-source with 1,000 GitHub stars. SAM Intelligence is made by SAM Seamless Network. The vendor behind a product decides its roadmap, support, and longevity, so check each company's profile before you commit.
Often, yes. GRASSMARLIN and SAM Intelligence are both OT Asset Discovery products. Key differences: GRASSMARLIN is Free while SAM Intelligence is Commercial, GRASSMARLIN is open-source. Use the table above to see where features, deployment and company size fit differ.
No OT Asset Discovery shortlist yet. This is the closest one.
Updated 2026-11-02
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