n8n

n8n is an open source workflow automation platform that enables teams to build powerful, flexible automations by connecting applications, APIs, and services through a visual node-based editor. With over 400 native integrations and the ability to execute custom JavaScript or Python code, n8n occupies a unique position in the automation landscape as a tool that serves both technical and non-technical users.

The workflow canvas in n8n is the central workspace where automations are built. Each workflow is composed of nodes connected by edges that define the data flow. Trigger nodes start workflows in response to events such as webhooks, scheduled cron jobs, email receipt, database changes, or application-specific triggers. Action nodes perform operations on data, interact with external services, transform data, or control workflow flow. Conditional nodes branch workflow execution based on data values, enabling complex branching logic.

The node library in n8n covers a vast range of applications and services. Communication tools (Slack, Teams, Discord, email), productivity platforms (Notion, Airtable, Google Workspace, Jira), data stores (PostgreSQL, MySQL, MongoDB, Redis, Airtable, Google Sheets), cloud platforms (AWS, Azure, Google Cloud), marketing tools, CRM systems, payment processors, and hundreds of other services all have dedicated nodes. The HTTP Request node enables integration with any REST API that does not have a dedicated node, and the Code node allows running arbitrary JavaScript or Python for cases requiring custom logic.

The Code node is one of n8n's most powerful differentiators from purely no-code tools. Developers can write JavaScript or Python directly within a workflow node to transform data, implement complex business logic, call libraries, or perform computations that would be impossible to express through a visual interface alone. This code-optional approach makes n8n equally useful for automation specialists who prefer visual tools and developers who want code-level control.

Sub-workflows allow breaking complex automation logic into smaller, reusable workflow modules that can be called from other workflows. This modularity improves maintainability in large automation suites and enables common patterns to be shared across multiple automation contexts.

The error handling capabilities in n8n include per-node error branches, workflow-level error handlers, retry logic, and dedicated error workflows that are triggered when a workflow fails. These features make it practical to build robust production automations that handle failures gracefully and notify the appropriate people when intervention is required.

n8n's data structure model uses a consistent JSON-based item format that flows through all nodes. Each node receives a list of items, processes them, and outputs a transformed list. This consistent data model simplifies building data transformation pipelines and makes it easy to understand and debug how data is modified as it flows through a workflow.

n8n can be self-hosted using Docker, npm, or cloud infrastructure, giving organizations full control over their automation data and execution environment. n8n Cloud is the managed hosted service for teams that prefer not to manage infrastructure. The fair-code license allows free self-hosting for most use cases while requiring a commercial license for offering n8n as a service to others.