# ESET Cloud Office Security vs Rspamd: side-by-side comparison (2026) [ESET Cloud Office Security](https://cybersectools.com/tools/eset-cloud-office-security) is a commercial [email security platforms](https://cybersectools.com/categories/email-security-platforms) solution by [ESET](https://cybersectools.com/companies/eset). [Rspamd](https://cybersectools.com/tools/rspamd) is a free [email security platforms](https://cybersectools.com/categories/email-security-platforms) solution. 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 | | ESET Cloud Office Security | Rspamd | |---|---|---| | Pricing model | Commercial | Free | | Category | Email Security Platforms | Email Security Platforms | | Verified | No | No | | Deployment type | Cloud | On-Premises | | Company size fit | SMB, Mid-Market, Enterprise | Startup, SMB, Mid-Market, Enterprise | | GitHub stars | – | 2,396 | | Last commit | – | Mar 2026 | | Company | ESET | – | | Headquarters | – | – | ### Use cases and capabilities | | ESET Cloud Office Security | Rspamd | |---|---|---| | Cloud Native | Yes | – | | Microsoft 365 | Yes | – | | Ransomware Prevention | Yes | – | | Sandbox | Yes | – | | Spam Prevention | Yes | Yes | | UDP | – | Yes | ### Core features **ESET Cloud Office Security** 10 features listed. Sign in on the page to see them. **Rspamd** No features listed. ### Integrations **ESET Cloud Office Security** 10 integrations listed. Sign in on the page to see them. **Rspamd** No integrations listed. ## Which one fits you Based on what each listing shows: deployment, company size, price and open source. - [ESET Cloud Office Security](https://cybersectools.com/tools/eset-cloud-office-security) fits if you want a cloud product. - [Rspamd](https://cybersectools.com/tools/rspamd) fits if you need to run it on your own servers, you are a startup, you need a free product and you want an open-source product. ## ESET Cloud Office Security vs Rspamd FAQ Common questions when comparing ESET Cloud Office Security vs Rspamd for email security platforms. ### What is the difference between ESET Cloud Office Security and Rspamd? **ESET Cloud Office Security**: Cloud email security for Microsoft 365 and Google Workspace applications, built by ESET. **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. The table above shows where their features, integrations, deployment and company size fit differ. ### Who makes ESET Cloud Office Security and Rspamd? **ESET Cloud Office Security** is made by ESET. **Rspamd** is open-source with 2,396 GitHub stars. The vendor behind a product decides its roadmap, support, and longevity, so check each company's profile before you commit. ### Is ESET Cloud Office Security a good alternative to Rspamd? Often, yes. ESET Cloud Office Security and Rspamd are both Email Security Platforms products, and both cover Spam Prevention. Key differences: ESET Cloud Office Security is Commercial while Rspamd is Free, Rspamd is open-source. Use the table above to see where features, deployment and company size fit differ. ## Related comparisons - [ESET Cloud Office Security vs Iberlayer Email Guardian](https://cybersectools.com/compare/eset-cloud-office-security-vs-iberlayer-email-guardian) - [ESET Cloud Office Security vs Cybersentriq MX Email Threat Protection](https://cybersectools.com/compare/cybersentriq-mx-email-threat-protection-vs-eset-cloud-office-security) - [ESET Cloud Office Security vs Cloudflare Cloud Email Security](https://cybersectools.com/compare/cloudflare-cloud-email-security-vs-eset-cloud-office-security) - [Rspamd vs Iberlayer Email Guardian](https://cybersectools.com/compare/iberlayer-email-guardian-vs-rspamd) - [Rspamd vs Cybersentriq MX Email Threat Protection](https://cybersectools.com/compare/cybersentriq-mx-email-threat-protection-vs-rspamd) - [Rspamd vs Cloudflare Cloud Email Security](https://cybersectools.com/compare/rspamd-vs-cloudflare-cloud-email-security) ## Alternatives to each - [See all ESET Cloud Office Security alternatives](https://cybersectools.com/alternatives/eset-cloud-office-security) - [See all Rspamd alternatives](https://cybersectools.com/alternatives/rspamd) --- Source: https://cybersectools.com/compare/eset-cloud-office-security-vs-rspamd For AI agents: each product above has its own Markdown page (add .md to its URL, for example https://cybersectools.com/tools/eset-cloud-office-security.md). Every CybersecTools shortlist is listed at https://cybersectools.com/shortlists.md. More on ESET Cloud Office Security and Rspamd: 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