What are some alternatives?
ifttt - IFTTT puts the internet to work for you. Create simple connections between the products you use every day.
Pushwoosh - Push Notifications Service | Your Apps Can Talk!
Pipefy - The new development platform built for agile teams.
Microsoft Flow - Similar to IFTTT and Zapier you can create automated tasks based on APIs from various services.
Integromat - Tool for workflow automation
KiSSFLOW - KiSSFLOW is a workflow tool & business process workflow management software to automate your workflow process. Rated #1 cloud workflow software in Google Apps Marketplace.