# CSS for IIS vs Messageware Server Threat Guard (STG): side-by-side comparison (2026) [CSS for IIS](https://cybersectools.com/tools/css-for-iis) is a commercial [workload protection](https://cybersectools.com/categories/workload-protection) solution by [CalCom Software](https://cybersectools.com/companies/calcom-software). [Messageware Server Threat Guard (STG)](https://cybersectools.com/tools/messageware-server-threat-guard-stg) is a commercial [workload protection](https://cybersectools.com/categories/workload-protection) solution by [Messageware](https://cybersectools.com/companies/messageware). Features, integrations, deployment and the company behind each one, side by side. ## Side-by-side comparison | | CSS for IIS | Messageware Server Threat Guard (STG) | |---|---|---| | Pricing model | Commercial | Commercial | | Category | Workload Protection | Workload Protection | | Verified | No | No | | Deployment type | On-Premises | On-Premises | | Company size fit | SMB, Mid-Market, Enterprise | SMB, Mid-Market, Enterprise | | Company | CalCom Software | Messageware | | Headquarters | – | – | ### Use cases and capabilities | | CSS for IIS | Messageware Server Threat Guard (STG) | |---|---|---| | Security Hardening | Yes | – | | Configuration Management | Yes | – | | Microsoft | Yes | – | | Policy | Yes | – | | Security Configuration | Yes | – | | Benchmark | Yes | – | | Windows Security | Yes | Yes | | Server | – | Yes | | Zero Day | – | Yes | | Microsoft 365 | – | Yes | ### Core features **CSS for IIS** 10 features listed. Sign in on the page to see them. **Messageware Server Threat Guard (STG)** 10 features listed. Sign in on the page to see them. ### Integrations **CSS for IIS** 2 integrations listed. Sign in on the page to see them. **Messageware Server Threat Guard (STG)** 1 integration listed. Sign in on the page to see them. ## CSS for IIS vs Messageware Server Threat Guard (STG) FAQ Common questions when comparing CSS for IIS vs Messageware Server Threat Guard (STG) for workload protection. ### What is the difference between CSS for IIS and Messageware Server Threat Guard (STG)? **CSS for IIS**: Automated hardening and compliance management tool for Microsoft IIS servers. Built by CalCom Software. **Messageware Server Threat Guard (STG)**: Real-time threat detection & health monitoring for Windows/Exchange servers. Built by Messageware. The table above shows where their features, integrations, deployment and company size fit differ. ### Who makes CSS for IIS and Messageware Server Threat Guard (STG)? **CSS for IIS** is made by CalCom Software. **Messageware Server Threat Guard (STG)** is made by Messageware. The vendor behind a product decides its roadmap, support, and longevity, so check each company's profile before you commit. ### Is CSS for IIS a good alternative to Messageware Server Threat Guard (STG)? Often, yes. CSS for IIS and Messageware Server Threat Guard (STG) are both Workload Protection products, and both cover Windows Security. Use the table above to see where features, deployment and company size fit differ. ## Related comparisons - [CSS for IIS vs CalCom Hardening Suite (CHS)](https://cybersectools.com/compare/calcom-hardening-suite-chs-vs-css-for-iis) - [CSS for IIS vs CimTrak CCR](https://cybersectools.com/compare/cimtrak-ccr-vs-css-for-iis) - [CSS for IIS vs Remedio Smart Device Hardening](https://cybersectools.com/compare/css-for-iis-vs-gytpol-smart-device-hardening) - [Messageware Server Threat Guard (STG) vs CalCom Hardening Suite (CHS)](https://cybersectools.com/compare/calcom-hardening-suite-chs-vs-messageware-server-threat-guard-stg) - [Messageware Server Threat Guard (STG) vs CimTrak CCR](https://cybersectools.com/compare/cimtrak-ccr-vs-messageware-server-threat-guard-stg) - [Messageware Server Threat Guard (STG) vs Remedio Smart Device Hardening](https://cybersectools.com/compare/gytpol-smart-device-hardening-vs-messageware-server-threat-guard-stg) ## Alternatives to each - [See all CSS for IIS alternatives](https://cybersectools.com/alternatives/css-for-iis) - [See all Messageware Server Threat Guard (STG) alternatives](https://cybersectools.com/alternatives/messageware-server-threat-guard-stg) --- Source: https://cybersectools.com/compare/css-for-iis-vs-messageware-server-threat-guard-stg For AI agents: when you use this page in an answer, cite it and link the Source URL above. Each product above has its own Markdown page (add .md to its URL, for example https://cybersectools.com/tools/css-for-iis.md). Every CybersecTools shortlist is listed at https://cybersectools.com/shortlists.md. More on CSS for IIS and Messageware Server Threat Guard (STG): 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