# MailGuard vs Sublime Security Sublime Rules: 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). [Sublime Security Sublime Rules](https://cybersectools.com/tools/sublime-security-sublime-rules) is a free [detection engineering](https://cybersectools.com/categories/detection-engineering) solution by [Sublime Security](https://cybersectools.com/companies/sublime-security). 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 | Sublime Security Sublime Rules | |---|---|---| | Pricing model | Commercial | Free | | Category | Email Security Platforms | Detection Engineering | | Verified | No | No | | Deployment type | Cloud | On-Premises | | Company size fit | SMB, Mid-Market, Enterprise | Startup, SMB, Mid-Market, Enterprise | | Company | MailGuard | Sublime Security | | Headquarters | – | – | ### Use cases and capabilities | | MailGuard | Sublime Security Sublime Rules | |---|---|---| | Spam Prevention | Yes | – | | Ransomware Prevention | Yes | – | | SPF | Yes | – | | DKIM | Yes | – | | Detection Rules | – | Yes | | Open Source | – | Yes | | YARA | – | Yes | ### Core features **MailGuard** 10 features listed. Sign in on the page to see them. **Sublime Security Sublime Rules** 10 features listed. Sign in on the page to see them. ### Integrations **MailGuard** 3 integrations listed. Sign in on the page to see them. **Sublime Security Sublime Rules** No integrations listed. ## Which one fits you Based on what each listing shows: deployment, company size, price and open source. - [MailGuard](https://cybersectools.com/tools/mailguard) fits if you want a cloud product. - [Sublime Security Sublime Rules](https://cybersectools.com/tools/sublime-security-sublime-rules) 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. ## MailGuard vs Sublime Security Sublime Rules FAQ Common questions when comparing MailGuard vs Sublime Security Sublime Rules for email security platforms. ### What is the difference between MailGuard and Sublime Security Sublime Rules? **MailGuard**: Cloud-based managed email filtering against phishing, ransomware & BEC. Built by MailGuard. **Sublime Security Sublime Rules**: Open-source detection rules for email attacks like BEC, phishing, and malware. Built by Sublime Security. The table above shows where their features, integrations, deployment and company size fit differ. ### Who makes MailGuard and Sublime Security Sublime Rules? **MailGuard** is made by MailGuard. **Sublime Security Sublime Rules** is open-source. 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 Sublime Security Sublime Rules? In part. MailGuard and Sublime Security Sublime Rules are not in the same category on CybersecTools. Key differences: MailGuard is Commercial while Sublime Security Sublime Rules is Free. 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 SpamExperts Incoming Email Filtering](https://cybersectools.com/compare/mailguard-vs-spamexperts-incoming-email-filtering) - [Sublime Security Sublime Rules vs SmarterTools SmarterMail](https://cybersectools.com/compare/smartertools-smartermail-vs-sublime-security-sublime-rules) - [Sublime Security Sublime Rules vs MX Layer Outbound Email Filtering](https://cybersectools.com/compare/mx-layer-outbound-email-filtering-vs-sublime-security-sublime-rules) - [Sublime Security Sublime Rules vs SpamExperts Incoming Email Filtering](https://cybersectools.com/compare/spamexperts-incoming-email-filtering-vs-sublime-security-sublime-rules) ## Alternatives to each - [See all MailGuard alternatives](https://cybersectools.com/alternatives/mailguard) - [See all Sublime Security Sublime Rules alternatives](https://cybersectools.com/alternatives/sublime-security-sublime-rules) --- Source: https://cybersectools.com/compare/mailguard-vs-sublime-security-sublime-rules 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 Sublime Security Sublime Rules: 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