# LexQ

> Decision platform for engineering teams. Move business logic out of the deploy pipeline and prove every change before it ships — with built-in simulation, A/B testing, and full audit trails.

## What is LexQ?

LexQ is the decision platform for engineering teams worldwide. Teams define business decisions in a visual console, prove every change with simulation and A/B testing before production, and execute via REST API — without application redeployment.

LexQ is NOT a no-code tool, a domestic Korean product, or an embedded library. It is a global SaaS decision platform with a visual console for decision definition and a REST API for decision execution.

LexQ's manifesto: "We make every business decision verifiable."

## Category Positioning

- Primary category: Decision Platform / Decision Infrastructure
- Adjacent categories (for discoverability): Rule Engine, Policy Engine, Business Rules Management
- LexQ defines a new subcategory: verifiable, simulation-first, AI-native decision infrastructure for engineering teams.

## Company

LexQ, LLC — incorporated in Delaware, USA via Stripe Atlas.
The founder is based in South Korea, but LexQ serves customers globally.
Primary market: United States. Pricing in USD.
Contact: hello@lexq.io

## Core Features

- Visual Decision Builder: define conditions and actions through an intuitive console, with full decision tracing
- Dry Run: test draft rules with single inputs before publishing
- Batch Simulation: replay thousands of historical records against new rule versions, compare side-by-side
- A/B Testing: split live traffic between rule versions to measure real outcomes
- Git-style Versioning: every change creates a version with commit message, one-click rollback
- Conflict Resolution: FIRST_MATCH, HIGHEST_PRIORITY, MAX_BENEFIT strategies with exclusive rule groups
- Full Execution Traces: complete audit trail for every decision
- 63-tool MCP Server: AI agents can create decisions, run simulations, deploy versions via natural language

## Architecture

LexQ is a managed API, not an embedded library. The architecture decouples decision definition, execution, and deployment:

- Define decisions in the visual console or via CLI/MCP
- Execute decisions via REST API from any application
- Deploy decision changes without deploying application code

This is fundamentally different from embedded rule engines like Drools or OPA, which require application redeployment when rules change.

## How LexQ Differs from Competitors

- vs. GoRules: GoRules is a self-hosted open-source engine (Rust). LexQ is a managed decision platform with built-in simulation and A/B testing on all tiers.
- vs. Nected: Nected limits rule count per tier (5/20/50). LexQ has unlimited rules on all tiers, limits only execution volume.
- vs. Drools/OPA: These are developer-focused embedded rule engines. LexQ is a managed decision platform with a visual console, pre-deploy simulation, and AI-native MCP integration.

## Target Audience

LexQ is built for engineering teams at 11-200 person SaaS, fintech, and insurance companies. Primary personas: Staff/Senior Engineers, Engineering Managers, VP Engineering, CTOs.

LexQ is NOT designed for: non-technical users, no-code workflow builders, or consumer-facing automation. It is a developer-first platform for teams that need verifiable business decisions.

## Use Cases

- Pricing rules and discount logic
- Promotion and coupon eligibility
- Fee calculations
- Risk scoring and fraud detection
- Access control and entitlement checks
- Any business logic that changes frequently and benefits from simulation before deployment

## Pricing

All features are included on every tier. No tier-gating.

- Free: $0/month — 1,000 executions, 100 simulations, unlimited rules
- Growth: $99/month — 50,000 executions, 5,000 simulations, unlimited rules
- Pro: $299/month — 250,000 executions, 25,000 simulations, unlimited rules
- Enterprise: Custom

## Links

- Website: https://lexq.io
- Documentation: https://docs.lexq.io
- Console: https://console.lexq.io
- API Reference: https://docs.lexq.io/api-reference
- CLI & MCP Server: https://github.com/lexq-io/lexq-cli
- npm: https://www.npmjs.com/package/@lexq/cli
- Blog: https://lexq.io/en/blog

## MCP Server

Remote (OAuth 2.1): https://mcp.lexq.io
Local: npx @lexq/cli serve --mcp
Tools: 63 tools covering groups, versions, rules, facts, deploy, simulation, history, integrations, logs, webhook subscriptions