NotRuler vs Untitled Goose Tool: 2026 Comparison
NotRuler is a free digital forensics and incident response tool. Untitled Goose Tool is a free digital forensics and incident response tool. Compare features, ratings, integrations, and community reviews side by side to find the best digital forensics and incident response fit for your security stack.
CST VerdictBased on our analysis of available product data, here is our conclusion:
Exchange administrators defending against Ruler-based attacks need NotRuler because it's the only free tool that directly detects the client-side Outlook rules and VBScript forms that Ruler exploits, catching what most EDR and email gateway logs miss. The 94 GitHub stars and active development indicate it's trusted by practitioners who've actually hunted this attack chain. Skip this if your organization has already replaced Outlook client rules with Conditional Access policies or if you lack Exchange on-premises infrastructure; NotRuler solves a specific post-compromise detection problem, not general email security.
Security teams investigating compromises in Azure/M365 environments will get the most from Untitled Goose Tool because it hunts across AzureAD, tenant configurations, and mailbox artifacts in ways native Microsoft tools don't expose. The 952 GitHub stars and active community contributions signal real adoption among incident responders who've already chosen it over commercial alternatives. Skip this if you need a polished UI or vendor support contracts; Untitled Goose Tool rewards operators comfortable reading code and building queries, not clicking through wizards.
