# Cloudmark Authority vs MailGuard: side-by-side comparison (2026)

[Cloudmark Authority](https://cybersectools.com/tools/cloudmark-authority) is a commercial [email security platforms](https://cybersectools.com/categories/email-security-platforms) solution by [Cloudmark](https://cybersectools.com/companies/cloudmark). [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). 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

| | Cloudmark Authority | MailGuard |
|---|---|---|
| Pricing model | Commercial | Commercial |
| Category | Email Security Platforms | Email Security Platforms |
| Verified | No | No |
| Deployment type | On-Premises | Cloud |
| Company size fit | Enterprise | SMB, Mid-Market, Enterprise |
| Company | Cloudmark | MailGuard |
| Headquarters | – | – |

### Use cases and capabilities

| | Cloudmark Authority | MailGuard |
|---|---|---|
| Spam Prevention | Yes | Yes |
| Ransomware Prevention | – | Yes |
| SPF | – | Yes |
| DKIM | – | Yes |

### Core features

**Cloudmark Authority**

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

**MailGuard**

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

### Integrations

**Cloudmark Authority**

No integrations listed.

**MailGuard**

3 integrations 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.

- [Cloudmark Authority](https://cybersectools.com/tools/cloudmark-authority) fits if you need to run it on your own servers.
- [MailGuard](https://cybersectools.com/tools/mailguard) fits if you want a cloud product and you are a small business or a mid-market company.

## Cloudmark Authority vs MailGuard FAQ

Common questions when comparing Cloudmark Authority vs MailGuard for email security platforms.

### What is the difference between Cloudmark Authority and MailGuard?

**Cloudmark Authority**: Carrier-grade email security for ISPs blocking spam, phishing, and malware. Built by Cloudmark.

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

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

### Who makes Cloudmark Authority and MailGuard?

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

### Is Cloudmark Authority a good alternative to MailGuard?

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

## Related comparisons

- [Cloudmark Authority vs SmarterTools SmarterMail](https://cybersectools.com/compare/cloudmark-authority-vs-smartertools-smartermail)
- [Cloudmark Authority vs MX Layer Outbound Email Filtering](https://cybersectools.com/compare/cloudmark-authority-vs-mx-layer-outbound-email-filtering)
- [Cloudmark Authority vs PowerDMARC Hosted DMARC](https://cybersectools.com/compare/cloudmark-authority-vs-powerdmarc-hosted-dmarc)
- [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)

## Alternatives to each

- [See all Cloudmark Authority alternatives](https://cybersectools.com/alternatives/cloudmark-authority)
- [See all MailGuard alternatives](https://cybersectools.com/alternatives/mailguard)

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Source: https://cybersectools.com/compare/cloudmark-authority-vs-mailguard

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

More on Cloudmark Authority and MailGuard: 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