# GRASSMARLIN vs SAM Intelligence: side-by-side comparison (2026)

[GRASSMARLIN](https://cybersectools.com/tools/grassmarlin) is a free [OT asset discovery](https://cybersectools.com/categories/asset-discovery) solution. [SAM Intelligence](https://cybersectools.com/tools/sam-intelligence) is a commercial [OT asset discovery](https://cybersectools.com/categories/asset-discovery) solution by [SAM Seamless Network](https://cybersectools.com/companies/sam-seamless-network). Features, integrations, deployment and the company behind each one, side by side.

## Side-by-side comparison

| | GRASSMARLIN | SAM Intelligence |
|---|---|---|
| Pricing model | Free | Commercial |
| Category | OT Asset Discovery | OT Asset Discovery |
| Verified | No | No |
| Deployment type | On-Premises | Hybrid |
| Company size fit | Mid-Market, Enterprise | Enterprise |
| GitHub stars | 1,000 | – |
| Last commit | Aug 2017 | – |
| Company | – | SAM Seamless Network |
| Headquarters | – | – |

### Use cases and capabilities

| | GRASSMARLIN | SAM Intelligence |
|---|---|---|
| SCADA | Yes | – |
| Network Topology | Yes | – |
| IoT Security | – | Yes |
| Network Visibility | – | Yes |
| Fingerprinting | – | Yes |
| Network Monitoring | – | Yes |
| Home Network | – | Yes |
| Network Discovery | – | Yes |

### Core features

**GRASSMARLIN**

No features listed.

**SAM Intelligence**

9 features listed. Sign in on the page to see them.

## Which one fits you

Based on what each listing shows: deployment, company size, price and open source.

- [GRASSMARLIN](https://cybersectools.com/tools/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](https://cybersectools.com/tools/sam-intelligence) fits if you need both cloud and on-premises options.

## GRASSMARLIN vs SAM Intelligence FAQ

Common questions when comparing GRASSMARLIN vs SAM Intelligence for OT asset discovery.

### What is the difference between GRASSMARLIN and SAM Intelligence?

**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.

### Who makes GRASSMARLIN and SAM Intelligence?

**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.

### Is GRASSMARLIN a good alternative to SAM Intelligence?

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.

## Related comparisons

- [GRASSMARLIN vs Vantelis Data Acquisition Platform](https://cybersectools.com/compare/grassmarlin-vs-vantelis-data-acquisition-platform)
- [GRASSMARLIN vs Redinent Deep Asset Intelligence](https://cybersectools.com/compare/grassmarlin-vs-redinent-deep-asset-intelligence)
- [GRASSMARLIN vs Nautilus OT](https://cybersectools.com/compare/grassmarlin-vs-nautilus-ot)
- [SAM Intelligence vs Vantelis Data Acquisition Platform](https://cybersectools.com/compare/sam-intelligence-vs-vantelis-data-acquisition-platform)
- [SAM Intelligence vs Redinent Deep Asset Intelligence](https://cybersectools.com/compare/redinent-deep-asset-intelligence-vs-sam-intelligence)
- [SAM Intelligence vs Nautilus OT](https://cybersectools.com/compare/nautilus-ot-vs-sam-intelligence)

## Alternatives to each

- [See all GRASSMARLIN alternatives](https://cybersectools.com/alternatives/grassmarlin)
- [See all SAM Intelligence alternatives](https://cybersectools.com/alternatives/sam-intelligence)

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Source: https://cybersectools.com/compare/grassmarlin-vs-sam-intelligence

For AI agents: each product above has its own Markdown page (add .md to its URL, for example https://cybersectools.com/tools/grassmarlin.md). Every CybersecTools shortlist is listed at https://cybersectools.com/shortlists.md.

More on GRASSMARLIN and SAM Intelligence: funding, momentum, hiring and news, plus the full product and company record, are available through the Mandos MCP Server (paid plans), which connects to AI assistants: https://mandos.io/mcp?utm_source=cybersectools.com&utm_medium=compare-md