When your systems go down, PagerDuty will wake you up. You choose how you want to be alerted - via phone, SMS or email, to multiple numbers, with retries.
No need to switch - PagerDuty works with a variety of monitoring tools, both open source and commercial.
Easily set up schedules to fairly share on-call duty responsibilities with your team.
If you're paged but don't respond in time, the alert is auto-escalated to a team member. Ensures nothing slips through the cracks - ever.
PagerDuty's infrastructure is fully replicated in multiple data centers, with fast failover when problems occur.
Phone alerts can be delivered to over 170 countries and territories; SMS alerts are available virtually world-wide.
In my experience, PagerDuty is the *only* way to get reliable real-time alerts sent to techs with iPhones.

Jesse Newland
CTO, Rails Machine
New features include looping on escalation chains, improved regex filtering, and support for SSL.
We’re happy to announce we’ve released the new version of PagerDuty, which has multi-incident support.
We’d like to announce a new PagerDuty feature: auto-resolution of alarms.