Intercom - Intercom is a customer relationship management and messaging tool for web businesses. Build relationships with users to create loyal customers.
Google App Engine - A powerful platform to build web and mobile apps that scale automatically.
Freshdesk - Freshdesk is a cloud-based customer support software that lets you support customers through traditional channels like phone and email, social channels like Facebook and Twitter, and your own branded community
Dokku - Docker powered mini-Heroku in around 100 lines of Bash
Zoho Desk - Industry's first context-aware Helpdesk Software
Google Cloud Functions - A serverless platform for building event-based microservices.