Commercial stewardship for an open-source project.
Maester Cloud is the hosted history, drift detection, configuration, and evidence layer for Maester and Zero Trust Assessment results. It's one commercial product built around an open core, not a company-owned control point.
Maester stays open source
Maester is the open-source runner and test ecosystem for Microsoft 365 security. It remains community-driven and MIT-licensed.
- The core runner stays free.
- The tests stay free.
- Running Maester locally stays free.
- MIT license and broad reuse stay intentional.
What Maester Cloud is (and isn't) in v1
Bring your own Maester and Zero Trust runs from CI and send the results, or let the managed Maester Runner run them inside Maester Cloud. Either way it keeps the history, detects drift, and alerts you.
- Granular portal roles. Everyone you assign gets the same access for now.
- Maester AI. It stays off by default and arrives after GA.
- Custom retention beyond the standard tenant history window.
The live demo shows where we are heading. Not every feature ships in the first release.
Every plan keeps the tests honest.
Microsoft 365 security standards keep evolving. CIS, CISA, and Microsoft baselines change, and the tests have to keep pace. The subscription (hosted or self-hosted) primarily funds that open-source maintenance work.
Every plan helps keep Maester tests open, accurate, and aligned with evolving security standards.
This isn't a donation. You receive a real hosted service or support plan while also helping improve security for the broader community.