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Drools vs Hazel

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DroolsBusiness Rules Engines
HazelBusiness Rules Engines
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Price
Free
$42 one-time

Business Rules Engines

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Business Rules Engines

Overview
Focus
Business Rules Engines
Business Rules Engines
Product
Open-source business rules management system with decision tables, scorecards, and complex event processing engine.
Automated file organization for macOS using rules to watch folders, sort, tag, and archive.
Headquarters
Open Source
Chicago, Illinois
Company size
2-10 employees
2-10 employees
Founded
2001
2006
Pricing details
Published rate
Free
$42 one-time
Free options
Free plan
Free trial
Source updated
Oct 29, 2026
Oct 29, 2026

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Business Rules Engines