Node-RED — #4 Alternative to Zapier

Name: Node-RED
Rating: 4.86 (1126 reviews)

OpenJS Foundation visual event-driven wiring for APIs, MQTT, hardware, and webhooks

Battle-tested low-footprint Node.js flow runtime with 4,000+ community nodes running everywhere from Raspberry Pi edge gateways to enterprise Kubernetes.

License: Apache-2.0 · Pricing: Free & Open Source · Compare all Zapier alternatives · Official Website