# ClamAV vs OnSystem Logic OnSystem Defender: side-by-side comparison (2026)

[ClamAV](https://cybersectools.com/tools/clamav) is a free [endpoint protection platform](https://cybersectools.com/categories/epp) solution. [OnSystem Logic OnSystem Defender](https://cybersectools.com/tools/onsystem-logic-onsystem-defender) is a commercial [endpoint protection platform](https://cybersectools.com/categories/epp) solution by [OnSystem Logic](https://cybersectools.com/companies/onsystem-logic). Features, integrations, deployment and the company behind each one, side by side.

## Side-by-side comparison

| | ClamAV | OnSystem Logic OnSystem Defender |
|---|---|---|
| Pricing model | Free | Commercial |
| Category | Endpoint Protection Platform | Endpoint Protection Platform |
| Verified | No | No |
| Deployment type | On-Premises | On-Premises |
| Company size fit | Startup, SMB, Mid-Market, Enterprise | SMB, Mid-Market, Enterprise |
| Company | – | OnSystem Logic |
| Headquarters | – | – |

### Use cases and capabilities

| | ClamAV | OnSystem Logic OnSystem Defender |
|---|---|---|
| Open Source | Yes | – |
| Security Tools | Yes | – |
| Ransomware Prevention | – | Yes |
| Zero Day | – | Yes |
| App Security | – | Yes |
| Whitelist | – | Yes |
| Windows | – | Yes |
| Windows Security | – | Yes |
| Software Supply Chain | – | Yes |
| Runtime Security | – | Yes |
| Security Hardening | – | Yes |
| Anomaly Detection | – | Yes |

### Core features

**ClamAV**

No features listed.

**OnSystem Logic OnSystem Defender**

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.

- [ClamAV](https://cybersectools.com/tools/clamav) fits if you are a startup and you need a free product.

## ClamAV vs OnSystem Logic OnSystem Defender FAQ

Common questions when comparing ClamAV vs OnSystem Logic OnSystem Defender for endpoint protection platform.

### What is the difference between ClamAV and OnSystem Logic OnSystem Defender?

**ClamAV**: ClamAV is an open-source antivirus engine that detects trojans, viruses, malware, and other malicious threats.

**OnSystem Logic OnSystem Defender**: Endpoint app control & memory protection to prevent malware execution on Windows. Built by OnSystem Logic.

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

### Is ClamAV a good alternative to OnSystem Logic OnSystem Defender?

Often, yes. ClamAV and OnSystem Logic OnSystem Defender are both Endpoint Protection Platform products. Key differences: ClamAV is Free while OnSystem Logic OnSystem Defender is Commercial. Use the table above to see where features, deployment and company size fit differ.

## Related comparisons

- [ClamAV vs QuellSecure Active Containment](https://cybersectools.com/compare/clamav-vs-quellsecure-active-containment)
- [ClamAV vs DataSecure RDR](https://cybersectools.com/compare/clamav-vs-datasecure-rdr)
- [ClamAV vs Bkav Pro](https://cybersectools.com/compare/bkav-pro-vs-clamav)
- [OnSystem Logic OnSystem Defender vs QuellSecure Active Containment](https://cybersectools.com/compare/onsystem-logic-onsystem-defender-vs-quellsecure-active-containment)
- [OnSystem Logic OnSystem Defender vs DataSecure RDR](https://cybersectools.com/compare/datasecure-rdr-vs-onsystem-logic-onsystem-defender)
- [OnSystem Logic OnSystem Defender vs Bkav Pro](https://cybersectools.com/compare/bkav-pro-vs-onsystem-logic-onsystem-defender)

## Alternatives to each

- [See all ClamAV alternatives](https://cybersectools.com/alternatives/clamav)
- [See all OnSystem Logic OnSystem Defender alternatives](https://cybersectools.com/alternatives/onsystem-logic-onsystem-defender)

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Source: https://cybersectools.com/compare/clamav-vs-onsystem-logic-onsystem-defender

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

More on ClamAV and OnSystem Logic OnSystem Defender: 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