n8n

WHAT IS IT?

n8n is a workflow automation platform that combines a visual node-based editor with the ability to write JavaScript or Python code at any step. You connect services together, define your logic, and it runs — self-hosted or in their cloud. With over 182k stars on GitHub, it's one of the most popular open-source alternatives to Zapier and Make.

WHY IS IT INTERESTING?

• Visual + code : the drag-and-drop editor handles simple cases, but you can inject native JavaScript or Python into any node when logic gets complex.
• 400+ native integrations : from Slack to PostgreSQL to Google Sheets, connectors are ready out of the box. Over 900 community templates to get started fast.
• Built-in AI via LangChain : AI agents are first-class citizens. You can build LLM chains directly in your workflows without hand-rolling API calls.
• Full self-hosting : you keep complete control over your data and workflows. A single docker run and you're up.
• Fair-code model : the source code is visible and modifiable. The licensing model allows self-hosting while sustaining project development.
• Native error handling : each node can have its own error flow with automatic retries and notifications. No need to wrap your workflows in hand-crafted try-catch logic.

USE CASES

• Sync data between CRM, databases, and communication tools in real time
• Build lead enrichment pipelines with scraping, APIs, and AI scoring
• Automate infrastructure monitoring with conditional alerts on Slack or PagerDuty
• Orchestrate AI agents that process emails, classify tickets, or generate reports
• Create custom webhooks to connect internal tools without building an API