Stately is a visual software modeling platform that allows developers and teams to design, simulate, and implement application logic using state machines and statecharts. It provides a collaborative, visual environment where complex frontend and backend workflows can be represented as diagrams and then transformed into executable code.

At its core, Stately uses a drag-and-drop editor to model logic flows visually, making it easier to understand, prototype, and communicate system behavior across teams. These diagrams are not just static representations—they are executable and can be simulated, tested, and iterated on before being integrated into production systems.

The platform is tightly integrated with XState, an open-source JavaScript/TypeScript library for managing application state. This allows developers to export diagrams directly into production-ready code and run them across environments such as frontend frameworks (React, Vue, Svelte) or backend systems.

Stately also incorporates AI-assisted features that help generate workflows, suggest improvements, and scaffold logic from natural language input. This reduces the complexity of designing state-driven systems and speeds up development. Additionally, it includes features like automatic test generation, versioning, and GitHub synchronization, making it suitable for full lifecycle development—from ideation to deployment.

The platform is positioned as a “source of truth” for application logic, enabling teams to align around visual documentation that stays in sync with code. It is particularly useful for complex systems where predictable state management, workflow orchestration, and collaboration are critical.

Key features include:

• Visual drag-and-drop editor for state machines and workflows
• Simulation and testing of logic before deployment
• Code generation to JavaScript/TypeScript via XState
• AI-assisted workflow creation and refinement
• Real-time collaboration and versioning
• GitHub integration and export to multiple formats

Common use cases include:

• Designing frontend user flows
• Modeling backend workflows
• Building state-driven applications
• Prototyping complex systems
• Generating tests for application logic
• Aligning teams around shared system behavior

Stately is developed by Stately, founded by David Khourshid, the creator of XState, and maintained as a platform for visual logic modeling and state management.