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Maester vs Prowler: catalog facts
Maester	Prowler
Free Free and open source, community driven.	Free The open-source software is available without a license fee. Hosting, hardware and…
Command line	Windows, macOS, Linux, Command line
More than 360 ready-made security tests Five compliance baselines in a single report	Includes checks across multiple cloud platforms and frameworks.
Limited to Microsoft 365 and Entra tenants Requires PowerShell and Microsoft Graph permissions	Requires cloud permissions and review of environment-specific findings.
Downloadable app	Downloadable app
Open source	Open source
License not stated	License: Apache-2.0
Not stated if an account is needed	Not stated if an account is needed
Not stated if it works offline	Not stated if it works offline
Official website Full listing and sources Checked September 23, 2026	Official website Full listing and sources Checked September 22, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.