# Rspamd vs SmarterTools SmarterMail: side-by-side comparison (2026)

[Rspamd](https://cybersectools.com/tools/rspamd) is a free [email security platforms](https://cybersectools.com/categories/email-security-platforms) solution. [SmarterTools SmarterMail](https://cybersectools.com/tools/smartertools-smartermail) is a commercial [email security platforms](https://cybersectools.com/categories/email-security-platforms) solution by [SmarterTools](https://cybersectools.com/companies/smartertools). 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

| | Rspamd | SmarterTools SmarterMail |
|---|---|---|
| Pricing model | Free | Commercial |
| Category | Email Security Platforms | Email Security Platforms |
| Verified | No | No |
| Deployment type | On-Premises | On-Premises |
| Company size fit | Startup, SMB, Mid-Market, Enterprise | Startup, SMB, Mid-Market, Enterprise |
| GitHub stars | 2,396 | – |
| Last commit | Mar 2026 | – |
| Company | – | SmarterTools |
| Headquarters | – | – |

### Use cases and capabilities

| | Rspamd | SmarterTools SmarterMail |
|---|---|---|
| UDP | Yes | – |
| Spam Prevention | Yes | Yes |
| Linux | – | Yes |
| Windows | – | Yes |
| DKIM | – | Yes |
| SPF | – | Yes |
| DMARC | – | Yes |

### Core features

**Rspamd**

No features listed.

**SmarterTools SmarterMail**

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

### Integrations

**Rspamd**

No integrations listed.

**SmarterTools SmarterMail**

6 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.

- [Rspamd](https://cybersectools.com/tools/rspamd) fits if you need a free product and you want an open-source product.

## Rspamd vs SmarterTools SmarterMail FAQ

Common questions when comparing Rspamd vs SmarterTools SmarterMail for email security platforms.

### What is the difference between Rspamd and SmarterTools SmarterMail?

**Rspamd**: Rspamd is an advanced spam filtering system and email processing framework that evaluates messages using multiple analysis methods and integrates with MTAs for high-volume email processing.

**SmarterTools SmarterMail**: Email server with antispam, antivirus, and security features for Linux/Windows, built by SmarterTools.

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

### Who makes Rspamd and SmarterTools SmarterMail?

**Rspamd** is open-source with 2,396 GitHub stars. **SmarterTools SmarterMail** is made by SmarterTools. The vendor behind a product decides its roadmap, support, and longevity, so check each company's profile before you commit.

### Is Rspamd a good alternative to SmarterTools SmarterMail?

Often, yes. Rspamd and SmarterTools SmarterMail are both Email Security Platforms products, and both cover Spam Prevention. Key differences: Rspamd is Free while SmarterTools SmarterMail is Commercial, Rspamd is open-source. Use the table above to see where features, deployment and company size fit differ.

## Related comparisons

- [Rspamd vs MX Layer Outbound Email Filtering](https://cybersectools.com/compare/mx-layer-outbound-email-filtering-vs-rspamd)
- [Rspamd vs PowerDMARC Hosted DMARC](https://cybersectools.com/compare/powerdmarc-hosted-dmarc-vs-rspamd)
- [Rspamd vs Sendmarc DMARC Managed Services](https://cybersectools.com/compare/rspamd-vs-sendmarc-dmarc-managed-services)
- [SmarterTools SmarterMail vs MX Layer Outbound Email Filtering](https://cybersectools.com/compare/mx-layer-outbound-email-filtering-vs-smartertools-smartermail)
- [SmarterTools SmarterMail vs PowerDMARC Hosted DMARC](https://cybersectools.com/compare/powerdmarc-hosted-dmarc-vs-smartertools-smartermail)
- [SmarterTools SmarterMail vs Sendmarc DMARC Managed Services](https://cybersectools.com/compare/sendmarc-dmarc-managed-services-vs-smartertools-smartermail)

## Alternatives to each

- [See all Rspamd alternatives](https://cybersectools.com/alternatives/rspamd)
- [See all SmarterTools SmarterMail alternatives](https://cybersectools.com/alternatives/smartertools-smartermail)

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Source: https://cybersectools.com/compare/rspamd-vs-smartertools-smartermail

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

More on Rspamd and SmarterTools SmarterMail: 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