Opsgenie

Opsgenie (acquired by the massive software giant Atlassian) is a fiercely competitive, highly robust, and massively deployed platform that operates as the primary, heavy-weight rival to PagerDuty. While PagerDuty is a standalone titan, Opsgenie derives massive power from its deep, native integration into the Atlassian ecosystem (Jira Service Management, Confluence, Bitbucket), making it the absolute default choice for Atlassian-heavy enterprises. The absolute core differentiator of Opsgenie is its "Deep Jira Synergy and Alert Flexibility." When a critical alert fires, Opsgenie can automatically create a Jira ticket, link it to the exact code commit in Bitbucket that caused the outage, and spin up a dedicated Slack channel for the responders. It completely centralizes the workflow within the tools the engineers are already using. Furthermore, Opsgenie offers incredibly powerful on-call scheduling and a 'Heartbeat' monitoring system (which alerts you if your monitoring tools silently fail). Because it offers enterprise-grade alerting at a highly competitive price point, and flawless Atlassian integration, it is massively popular among agile DevOps teams and enterprise IT departments globally.