What are some alternatives?
When comparing Node-RED and Zapier, you can also consider the following products
n8n.io - n8n is a free node-based "Open Source" (with Commons Clause) Workflow Automation Tool.
ifttt - IFTTT puts the internet to work for you. Create simple connections between the products you use every day.
Dell Boomi - The #1 Integration Cloud - Build Integrations anytime, anywhere with no coding required using Dell Boomi's industry leading iPaaS platform.
Git Butler - Pull Request and Issue Workflow Automation
PieSync - Seamless two-way sync between your CRM, marketing apps and Google in no time
Integromat - Tool for workflow automation