The Neighbours

Scope: the tools Node-RED is most often confused with or chosen against, and the honest trade each one makes.

Home Assistant

The closest neighbour, and usually a housemate rather than a rival. Home Assistant (this series has a guide) is a home-automation system: it knows what a light, a lock, and a household are, and its built-in automations cover most household logic. Node-RED is the wiring bench: people reach for it when an automation outgrows trigger-condition- action — long chains, odd data, several systems at once — and run it alongside, with Home Assistant exposing devices to it over MQTT or its own nodes. Rule of thumb: if the sentence starts with a device, start in Home Assistant; if it starts with data, start here.

n8n and the workflow services

n8n is Node-RED's cloud-flavoured cousin: the same draw-the-flow idea pointed at business services — mail, spreadsheets, CRMs, webhooks — with hundreds of polished service integrations and a licensing model to read before building anything commercial on it. Hosted services (Zapier, Make, IFTTT) remove the server entirely and charge by the task. The trade is uniform: they are better connected to other people's software and worse at being yours — a flow in Node-RED runs on your Pi, at your pace, owing nobody a per-run fee, and it will still run when a pricing page changes its mind.

Cron and a script

The oldest neighbour. A timer plus a shell script does a large fraction of what beginners build flows for, and if you already write scripts fluently, the marginal flow must earn its canvas. Node-RED wins when the job is several events, some judgement in the middle, and a state to remember — and when the next person to maintain it would rather read a drawing than your bash. It loses, happily, when the job is one command at 6 a.m.

Plain code

A small Node.js or Python program is a flow with the canvas removed: same events, same logic, better version control, worse visibility. Programmers underestimate how much of a flow's value is that a non-programmer in the house can see it. Households have more maintainers than they think.