OSS Tanbou
View on GitHub

ZEN Engine — define business decisions once in portable JSON and execute them consistently across platforms

OSS scale score Not calculatedOSS health 81Update pace 9 commits/30d
About these scores

OSS scale score is an unbounded metric that log-compresses and weights Stars, Watchers, Forks, and Contributors. Discovery score is the current OSS scale score minus the score at discovery. Update pace is commits in the last 30 days, growth momentum is the OSS scale score difference within the recent observation window, and OSS health is a 0–100 rating based on available recency, Community Health, and release data.

Stars
1,994
Primary language
Rust
License
MIT
Repository last updated
Aug 25, 2026

Overview

ZEN Engine is an open-source Rust business-rules engine using portable JSON Decision Models for decision tables, expressions, functions, and reusable sub-decisions, with bindings across Node.js, Python, Go, JVM/.NET, mobile, and other targets. The README describes the 2.0 engine line as stable.

Features and best fit

Based on official documentation; not hands-on tested · Content checked:

Represent business logic as tables, graphs, or policy documents

Rules use ZEN Expression Language and can be modeled as visual graphs/decision tables or typed policy documents; both compile to the same runtime.

Sources: [2]

Run one decision model across many language and device targets

Bindings cover Rust, Node.js, Python, Go, Java/Kotlin, .NET, iOS/Android and selected WASM targets, while applications decide where JSON definitions are loaded from.

Sources: [2]

For pricing, eligibility, permissions, and other changing decisions that should be separated from application code

It fits systems where business logic should remain human-readable and portable instead of being duplicated across services.

Sources: [2]

Separate the MIT engine from GoRules platform governance features

ZEN Engine itself is MIT. AI editing, approvals, rollback, audit/governance, and managed/self-hosted platform capabilities described in the README belong to the broader GoRules product. The latest GitHub release tag uniffi-v2.0.2 is package/binding-specific rather than a universal product version.

Sources: [2][3][4]

Official sources

  1. [1]gorules/zen repository(2026-09-18)
  2. [2]ZEN Engine README(2026-09-18)
  3. [3]ZEN Engine LICENSE(2026-09-18)
  4. [4]ZEN Engine latest GitHub release checked(2026-09-18)
Supplemental curator note

ZEN Engine's core value is one portable decision definition running consistently across languages and platforms. The MIT engine is separate from the broader GoRules platform for governance, approvals, AI, and managed deployment.

Try it in 3 steps

  1. 1

    Get the source

    git clone --depth 1 https://github.com/gorules/zen.git
  2. 2

    Enter the repository

    cd zen
  3. 3

    Check the official steps

    Continue with the commands in the README Installation, Quick Start, or Getting Started section.

    find . -maxdepth 1 -iname 'README*' -exec sed -n '1,220p' {} \; -quit
Check the official README

Growth

Growth trends · Last 30 days

1,994 Stars

Trend data is still being collected.

Development activity

Last 90 days · weekly

Commits (last 30 days)
9
Open PRs
8

Development activity is still being collected.

Built with

Categories and tags

Categories

Tags

GitHub data

GitHub dataView detailed GitHub data
View on GitHub
Stars
1,994
Forks
213
Watchers
28
Open issues
33
Primary language
Rust
License
MIT
Repository last updated
Aug 25, 2026
Write a related article

Share a guide or use case for this OSS in Markdown. Articles are published after administrator approval.

Report incorrect information

Tell us if any listing information is incorrect or outdated.