Workflow Builder is unclaimed —

Workflow Builder

Embed a production-ready workflow editor into your React app·workflowbuilder.io

Free plan · Open source See pricing ↓

Workflow Builder is a React SDK for embedding production-ready visual workflow editors into B2B SaaS products. It ships as an NPM package for the front-end canvas, together with an open-source reference back-end and swappable execution-engine integrations such as Temporal and LangGraph. The editor includes a schema-driven properties panel, smart edge routing, ELK auto-layout, and JSON serialization, and is meant to be embedded and white-labeled inside a customer's own product rather than used as a standalone automation platform.

What it's for

Workflow automation with approvals, routing, and notificationsAI workflow editors for multi-step agent pipelinesAgent designers, prompt chains, decision trees, tool-calling flowsIVR call flow editors with queue and time-based routingEmail and SMS campaign builders with branching and AI scoringTelehealth patient flows and clinical decision treesParameter service configuration for manufacturing linesEmbedded visual orchestration layers for automation products

Features 19

Auto-save and persistence (local storage or custom API)
Configurable node library (triggers, actions, conditions, branching, delays)
Design system with Figma source (Enterprise)
Dynamic, schema-driven properties panel (JSON Schema)
ELK auto-layout (vertical, horizontal, layered)
Engine-agnostic architecture via port interfaces (WorkflowEnginePort, ActivityRunnerPort, EventEmitterPort)
Flow Runner for in-editor simulation (Enterprise)
Interactive edge reshaping
JSON serialization of workflow state
LangGraph visual canvas integration for code-first agents
Performance optimized for 500+ node diagrams
Plugin-first architecture
Read-only mode for viewers
Smart edge routing that avoids node collisions
Temporal reference execution adapter
Theming and white-label support (light/dark)
Undo, redo, copy, paste with full history stack
Variable Picker for passing data between nodes
Visual workflow canvas with drag-and-drop

At a glance

free tieropen sourceself-hostableAPI

TypeLibrary / SDK

DeploymentSelf-hosted

PlatformsWeb

Fordevelopers, engineering teams, B2B SaaS companies, AI platform teams, data pipeline and ETL SaaS products, fintech companies, CPaaS and messaging platforms, ERP vendors

CompanySynergy Codes

Integrations

TemporalLangGraphAWS Step FunctionsReact FlowInngestCamunda

Resources

Docs

Pricing

Enterprise Edition is a one-time perpetual license of €6,990 with no recurring subscription, per-seat fees, API limits, or usage caps. Community Edition is free and open source (Apache 2.0).

Community EditionFree

Full three-block stack (editor, reference back-end, Temporal adapter) open source, free forever.

Enterprise EditionQuote

One-time perpetual license; no subscriptions, no per-seat pricing, no API call limits, no usage caps stated.