# MailGuard vs OpenText Email Security: side-by-side comparison (2026)

[MailGuard](https://cybersectools.com/tools/mailguard) is a commercial [email security platforms](https://cybersectools.com/categories/email-security-platforms) solution by [MailGuard](https://cybersectools.com/companies/mailguard). [OpenText Email Security](https://cybersectools.com/tools/opentext-email-security) is a commercial [email security platforms](https://cybersectools.com/categories/email-security-platforms) solution by [OpenText Cybersecurity](https://cybersectools.com/companies/opentext-cybersecurity). Features, integrations, deployment and the company behind each one, side by side.

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

| | MailGuard | OpenText 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 | MailGuard | OpenText Cybersecurity |
| Headquarters | – | – |

### Use cases and capabilities

| | MailGuard | OpenText Email Security |
|---|---|---|
| Spam Prevention | Yes | – |
| Ransomware Prevention | Yes | – |
| SPF | Yes | – |
| DKIM | Yes | – |
| Ransomware | – | Yes |

### Core features

**MailGuard**

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

**OpenText Email Security**

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

### Integrations

**MailGuard**

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

**OpenText Email Security**

No integrations listed.

## MailGuard vs OpenText Email Security FAQ

Common questions when comparing MailGuard vs OpenText Email Security for email security platforms.

### What is the difference between MailGuard and OpenText Email Security?

**MailGuard**: Cloud-based managed email filtering against phishing, ransomware & BEC. Built by MailGuard.

**OpenText Email Security**: Comprehensive email security platform protecting inbound/outbound communications. Built by OpenText Cybersecurity.

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

### Who makes MailGuard and OpenText Email Security?

**MailGuard** is made by MailGuard. **OpenText Email Security** is made by OpenText Cybersecurity. The vendor behind a product decides its roadmap, support, and longevity, so check each company's profile before you commit.

### Is MailGuard a good alternative to OpenText Email Security?

Often, yes. MailGuard and OpenText Email Security are both Email Security Platforms products. Use the table above to see where features, deployment and company size fit differ.

## Related comparisons

- [MailGuard vs SmarterTools SmarterMail](https://cybersectools.com/compare/mailguard-vs-smartertools-smartermail)
- [MailGuard vs MX Layer Outbound Email Filtering](https://cybersectools.com/compare/mailguard-vs-mx-layer-outbound-email-filtering)
- [MailGuard vs PowerDMARC Hosted DMARC](https://cybersectools.com/compare/mailguard-vs-powerdmarc-hosted-dmarc)
- [OpenText Email Security vs SmarterTools SmarterMail](https://cybersectools.com/compare/opentext-email-security-vs-smartertools-smartermail)
- [OpenText Email Security vs MX Layer Outbound Email Filtering](https://cybersectools.com/compare/mx-layer-outbound-email-filtering-vs-opentext-email-security)
- [OpenText Email Security vs PowerDMARC Hosted DMARC](https://cybersectools.com/compare/opentext-email-security-vs-powerdmarc-hosted-dmarc)

## Alternatives to each

- [See all MailGuard alternatives](https://cybersectools.com/alternatives/mailguard)
- [See all OpenText Email Security alternatives](https://cybersectools.com/alternatives/opentext-email-security)

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Source: https://cybersectools.com/compare/mailguard-vs-opentext-email-security

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

More on MailGuard and OpenText 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