# CalCom Hardening Suite (CHS) vs Messageware Server Threat Guard (STG): side-by-side comparison (2026) [CalCom Hardening Suite (CHS)](https://cybersectools.com/tools/calcom-hardening-suite-chs) 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 | | CalCom Hardening Suite (CHS) | 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 | | CalCom Hardening Suite (CHS) | Messageware Server Threat Guard (STG) | |---|---|---| | Security Hardening | Yes | – | | Security Configuration | Yes | – | | Configuration Management | Yes | – | | Windows Security | Yes | Yes | | Security Policy | Yes | – | | Linux | Yes | – | | Server | – | Yes | | Zero Day | – | Yes | | Microsoft 365 | – | Yes | ### Core features **CalCom Hardening Suite (CHS)** 9 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 **CalCom Hardening Suite (CHS)** No integrations listed. **Messageware Server Threat Guard (STG)** 1 integration listed. Sign in on the page to see them. ## CalCom Hardening Suite (CHS) vs Messageware Server Threat Guard (STG) FAQ Common questions when comparing CalCom Hardening Suite (CHS) vs Messageware Server Threat Guard (STG) for workload protection. ### What is the difference between CalCom Hardening Suite (CHS) and Messageware Server Threat Guard (STG)? **CalCom Hardening Suite (CHS)**: Automates server hardening with zero-downtime policy enforcement for Windows & Linux. 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 CalCom Hardening Suite (CHS) and Messageware Server Threat Guard (STG)? **CalCom Hardening Suite (CHS)** 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 CalCom Hardening Suite (CHS) a good alternative to Messageware Server Threat Guard (STG)? Often, yes. CalCom Hardening Suite (CHS) 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 - [CalCom Hardening Suite (CHS) vs CSS for IIS](https://cybersectools.com/compare/calcom-hardening-suite-chs-vs-css-for-iis) - [CalCom Hardening Suite (CHS) vs ESET Server Security](https://cybersectools.com/compare/calcom-hardening-suite-chs-vs-eset-server-security) - [CalCom Hardening Suite (CHS) vs Bitdefender GravityZone Cloud and Server Security](https://cybersectools.com/compare/bitdefender-gravityzone-cloud-and-server-security-vs-calcom-hardening-suite-chs) - [Messageware Server Threat Guard (STG) vs CSS for IIS](https://cybersectools.com/compare/css-for-iis-vs-messageware-server-threat-guard-stg) - [Messageware Server Threat Guard (STG) vs ESET Server Security](https://cybersectools.com/compare/eset-server-security-vs-messageware-server-threat-guard-stg) - [Messageware Server Threat Guard (STG) vs Bitdefender GravityZone Cloud and Server Security](https://cybersectools.com/compare/bitdefender-gravityzone-cloud-and-server-security-vs-messageware-server-threat-guard-stg) ## Alternatives to each - [See all CalCom Hardening Suite (CHS) alternatives](https://cybersectools.com/alternatives/calcom-hardening-suite-chs) - [See all Messageware Server Threat Guard (STG) alternatives](https://cybersectools.com/alternatives/messageware-server-threat-guard-stg) --- Source: https://cybersectools.com/compare/calcom-hardening-suite-chs-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/calcom-hardening-suite-chs.md). Every CybersecTools shortlist is listed at https://cybersectools.com/shortlists.md. More on CalCom Hardening Suite (CHS) 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