# GRASSMARLIN vs Vantelis Data Acquisition Platform: side-by-side comparison (2026)

[GRASSMARLIN](https://cybersectools.com/tools/grassmarlin) is a free [OT asset discovery](https://cybersectools.com/categories/asset-discovery) solution. [Vantelis Data Acquisition Platform](https://cybersectools.com/tools/vantelis-data-acquisition-platform) is a commercial [OT asset discovery](https://cybersectools.com/categories/asset-discovery) solution by [Vantelis](https://cybersectools.com/companies/vantelis). Features, integrations, deployment and the company behind each one, side by side.

## Side-by-side comparison

| | GRASSMARLIN | Vantelis Data Acquisition Platform |
|---|---|---|
| Pricing model | Free | Commercial |
| Category | OT Asset Discovery | OT Asset Discovery |
| Verified | No | No |
| Deployment type | On-Premises | On-Premises |
| Company size fit | Mid-Market, Enterprise | Mid-Market, Enterprise |
| GitHub stars | 1,000 | – |
| Last commit | Aug 2017 | – |
| Company | – | Vantelis |
| Headquarters | – | – |

### Use cases and capabilities

| | GRASSMARLIN | Vantelis Data Acquisition Platform |
|---|---|---|
| SCADA | Yes | Yes |
| Network Topology | Yes | – |
| Critical Infrastructure | – | Yes |
| Network Visibility | – | Yes |
| Network Discovery | – | Yes |
| PLC | – | Yes |
| IoT Security | – | Yes |
| Network Monitoring | – | Yes |
| Packet Capture | – | Yes |
| Visibility | – | Yes |
| Inventory | – | Yes |

### Core features

**GRASSMARLIN**

No features listed.

**Vantelis Data Acquisition Platform**

8 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 a free product and you want an open-source product.

## GRASSMARLIN vs Vantelis Data Acquisition Platform FAQ

Common questions when comparing GRASSMARLIN vs Vantelis Data Acquisition Platform for OT asset discovery.

### What is the difference between GRASSMARLIN and Vantelis Data Acquisition Platform?

**GRASSMARLIN**: Passively maps and visually displays ICS/SCADA network topology for network security.

**Vantelis Data Acquisition Platform**: Agentless OT data acquisition platform for passive asset & traffic visibility. Built by Vantelis.

The table above shows where their features, integrations, deployment and company size fit differ.

### Who makes GRASSMARLIN and Vantelis Data Acquisition Platform?

**GRASSMARLIN** is open-source with 1,000 GitHub stars. **Vantelis Data Acquisition Platform** is made by Vantelis. 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 Vantelis Data Acquisition Platform?

Often, yes. GRASSMARLIN and Vantelis Data Acquisition Platform are both OT Asset Discovery products, and both cover SCADA. Key differences: GRASSMARLIN is Free while Vantelis Data Acquisition Platform is Commercial, GRASSMARLIN is open-source. Use the table above to see where features, deployment and company size fit differ.

## Related comparisons

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

## Alternatives to each

- [See all GRASSMARLIN alternatives](https://cybersectools.com/alternatives/grassmarlin)
- [See all Vantelis Data Acquisition Platform alternatives](https://cybersectools.com/alternatives/vantelis-data-acquisition-platform)

---

Source: https://cybersectools.com/compare/grassmarlin-vs-vantelis-data-acquisition-platform

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 Vantelis Data Acquisition Platform: 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