Intercom - Intercom is a customer relationship management and messaging tool for web businesses. Build relationships with users to create loyal customers.
PagerDuty - Cloud based monitoring service
Sidequest for Slack - Create and track personal or support team tasks, 100% inside Slack.
OpsGenie - Alerting and On-Call Management for Dev&Ops Teams
Roby - Refreshingly simple helpdesk for Slack & Teams users
xMatters - xMatters transforms event data into intelligent communication IT teams, avoiding outages and disruptions