Zen Engine: Open-Source Business Rules Engine for Multi-Language JSON Decision Models
tom_doerr · x · 2026-08-14
The trending GitHub project Zen Engine is an open-source, cross-platform Business Rules Engine (BRE) written in Rust, currently boasting 1.9k stars.
Key features:
- Multi-Language Bindings: Natively supports NodeJS, Python, Go, Java, C#, Kotlin, and Swift.
- JSON Decision Models: Allows loading and executing JSON Decision Models (JDM) directly from JSON files.
- Tooling: Offers an open-source React editor for visual rule editing.
- Recent Changes: The latest version includes a breaking change for Rust crate consumers, disabling arbitraryprecision by default, which now requires manual feature addition.
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