# Microsoft Defender for Office 365 vs xorlab Email Security: side-by-side comparison (2026)

[Microsoft Defender for Office 365](https://cybersectools.com/tools/microsoft-defender-for-office-365) is a commercial [email security platforms](https://cybersectools.com/categories/email-security-platforms) solution by [Microsoft](https://cybersectools.com/companies/microsoft). [xorlab Email Security](https://cybersectools.com/tools/xorlab-email-security) is a commercial [email security platforms](https://cybersectools.com/categories/email-security-platforms) solution by [Xorlab](https://cybersectools.com/companies/xorlab). Features, integrations, deployment and the company behind each one, side by side.

## Our take

What our shortlists say about the one we picked.

### [Microsoft Defender for Office 365](https://cybersectools.com/tools/microsoft-defender-for-office-365)

Best for: Teams running Microsoft 365

It is on the list because it is built into Microsoft 365, and many companies already own it through their license, so the buying question is often settled before you start. That makes it the natural first layer if you run Microsoft 365. Decide whether it covers your risk alone or needs a second product beside it, since it is built to work with other email security products.

From [Best Email Security Solutions for Business](https://cybersectools.com/shortlists/best-email-security-platforms), Fall 2026.

Reviewed by [Nika (Nikoloz) Kokhreidze](https://cybersectools.com/about).

Need the answer fast? [Best Email Security Solutions for Business](https://cybersectools.com/shortlists/best-email-security-platforms) picks Proofpoint Core Email Protection, Microsoft Defender for Office 365, Mimecast Advanced Email Security and 4 more.

## Side-by-side comparison

| | Microsoft Defender for Office 365 | xorlab Email Security |
|---|---|---|
| Pricing model | Commercial | Commercial |
| Category | Email Security Platforms | Email Security Platforms |
| Verified | No | No |
| Deployment type | Cloud | Cloud |
| Company size fit | SMB, Mid-Market, Enterprise | SMB, Mid-Market, Enterprise |
| Company | Microsoft | Xorlab |
| Headquarters | – | – |

### Use cases and capabilities

| | Microsoft Defender for Office 365 | xorlab Email Security |
|---|---|---|
| Microsoft 365 | Yes | – |
| Zero Day | – | Yes |

### Core features

**Microsoft Defender for Office 365**

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

**xorlab Email Security**

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

### Integrations

**Microsoft Defender for Office 365**

4 integrations listed. Sign in on the page to see them.

**xorlab Email Security**

No integrations listed.

## Microsoft Defender for Office 365 vs xorlab Email Security FAQ

Common questions when comparing Microsoft Defender for Office 365 vs xorlab Email Security for email security platforms.

### What is the difference between Microsoft Defender for Office 365 and xorlab Email Security?

**Microsoft Defender for Office 365**: Email and collaboration security for Microsoft 365 environments. Built by Microsoft.

**xorlab Email Security**: AI-driven email security platform for detecting advanced email threats. Built by Xorlab.

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

### Who makes Microsoft Defender for Office 365 and xorlab Email Security?

**Microsoft Defender for Office 365** is made by Microsoft. **xorlab Email Security** is made by Xorlab. The vendor behind a product decides its roadmap, support, and longevity, so check each company's profile before you commit.

### Is Microsoft Defender for Office 365 a good alternative to xorlab Email Security?

Often, yes. Microsoft Defender for Office 365 and xorlab Email Security are both Email Security Platforms products. Use the table above to see where features, deployment and company size fit differ.

## Related comparisons

- [Microsoft Defender for Office 365 vs ID Agent Graphus](https://cybersectools.com/compare/id-agent-graphus-vs-microsoft-defender-for-office-365)
- [Microsoft Defender for Office 365 vs OPSWAT MetaDefender Email Security](https://cybersectools.com/compare/microsoft-defender-for-office-365-vs-opswat-metadefender-email-security)
- [Microsoft Defender for Office 365 vs GLIMPS Email Security for M365](https://cybersectools.com/compare/glimps-email-security-for-m365-vs-microsoft-defender-for-office-365)
- [xorlab Email Security vs ID Agent Graphus](https://cybersectools.com/compare/id-agent-graphus-vs-xorlab-email-security)
- [xorlab Email Security vs OPSWAT MetaDefender Email Security](https://cybersectools.com/compare/opswat-metadefender-email-security-vs-xorlab-email-security)
- [xorlab Email Security vs GLIMPS Email Security for M365](https://cybersectools.com/compare/glimps-email-security-for-m365-vs-xorlab-email-security)

## Alternatives to each

- [See all Microsoft Defender for Office 365 alternatives](https://cybersectools.com/alternatives/microsoft-defender-for-office-365)
- [See all xorlab Email Security alternatives](https://cybersectools.com/alternatives/xorlab-email-security)

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Source: https://cybersectools.com/compare/microsoft-defender-for-office-365-vs-xorlab-email-security

For AI agents: each product above has its own Markdown page (add .md to its URL, for example https://cybersectools.com/tools/microsoft-defender-for-office-365.md). Every CybersecTools shortlist is listed at https://cybersectools.com/shortlists.md.

More on Microsoft Defender for Office 365 and xorlab Email Security: 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