Business logic outlives infrastructure.

Quatrain Core · AGPL-v3 Open Source

Quatrain Core— the engine for infra-agnostic business logic.

Quatrain Core is a cloud-native suite of development bricks for building stateful applications. One Core for developers writing code and business experts orchestrating workflows.

Developer modeNo-code Core studio
Cloud-native
Deployed via the Tycho CLI
Stateful
State machines · BPM on roadmap
Dual access
Code & no-code
Open source
AGPL-v3-only
For developers

Install, compose, ship.

Install scripts, typed SDK, state machines and the Tycho CLI.

Explore
For CISOs & IT leaders

Audit, sovereignty, compliance.

Static analysis, signed packages, NIS 2 readiness, AGPL governance.

Explore
For startups & SMBs

Launch business apps faster.

No-code studio, AI agent and ready-made bricks — no lock-in.

Explore
Flagship — In progress

Autonomous business ops, by Quatrain Core.

The Quatrain Core AI agent translates natural-language requirements into domain models, state machines and screens, then deploys them on the infrastructure of your choice. It keeps a second brain (OKF knowledge base) of everything it learns along the way.

  • Infrastructure agnostic

    Deploy anywhere through the Tycho CLI.

  • Stateful by design

    Built on Core's workflow & conformance state machines.

  • Lifecycle aware

    Status, transitions, audit trails out of the box.

Explore the AI agent
Visual Logic Designer
STARTAI DECIDEAPPROVEREJECT
For developers

The SDK approach

Import high-level bricks directly into your stack. Type-safe, cloud-native, fully extensible.

import { WorkflowStateMachine } from '@quatrain/state-machine';

const orderProcess = new WorkflowStateMachine({
  id: 'order-processing',
  states: ['draft', 'submitted', 'approved', 'fulfilled'],
  transitions: [
    { from: 'draft', to: 'submitted', on: 'submit' },
    { from: 'submitted', to: 'approved', on: 'approve' },
  ],
});
Read the quickstart
For business experts

Visual orchestration

Build production-ready apps with a drag-and-drop interface that compiles to enterprise-grade state machines.

See the no-code studio
Quatrain Core · Modular bricks

Standardized Core packages, ready for production.

Browse all
01

Data Backends

Firestore, PostgreSQL and SQLite adapters.

@quatrain/backend-*
02

Auth

OIDC, Firebase, Supabase, RBAC.

@quatrain/auth-*
03

State Machine

Workflow & conformance state machines.

@quatrain/state-machine
04

Storage

S3/MinIO, Firebase, Supabase, local.

@quatrain/storage-*
05

AI Adapters

OpenAI-compatible & Gemini providers.

@quatrain/ai-*
06

Queues

AMQP, AWS SQS, GCP Pub/Sub, MQTT.

@quatrain/queue-*
07

Ingestion

OCR, video, audio and web pipelines.

@quatrain/ingestion-*
08

MDM

Agnostic master data management.

@quatrain/mdm
Use cases

Build the systems that run a business — with Quatrain Core.

Approval workflows

Multi-step BPM with role-based gates and SLAs.

Lightweight ERP

Stateful business objects across the full lifecycle.

AI-generated apps

Describe a process — get a deployed application.

All use cases
Compatible platforms

Bring your own infrastructure.

Deployment and infrastructure are handled by Tycho and its CLI.

  • FirebaseFirebase
  • FirestoreFirestore
  • SupabaseSupabase
  • PostgreSQLPostgreSQL
  • SQLiteSQLite
  • AWSAWS
  • Google CloudGoogle Cloud
  • AzureAzure
  • ScalewayScaleway
  • KubernetesKubernetes
  • DockerDocker
  • PodmanPodman
  • FirebaseFirebase
  • FirestoreFirestore
  • SupabaseSupabase
  • PostgreSQLPostgreSQL
  • SQLiteSQLite
  • AWSAWS
  • Google CloudGoogle Cloud
  • AzureAzure
  • ScalewayScaleway
  • KubernetesKubernetes
  • DockerDocker
  • PodmanPodman

The whole Quatrain ecosystem, on GitHub.

Three monorepos — Core (backend bricks), CoreUX (frontend components) and CoreApps (studio & containers) — every brick fully documented and AGPL-v3 licensed.

Reference docs rebuilt every night by CI
Open Core monorepo