Loggly a cloud service that provides as one of its services System Monitoring and Alerting.
Systems Monitoring & Alerting
Alerting on log events has never been so easy. Alert Birds will help you eliminate problems before they start by allowing you to monitor for specific events and errors. Create a better user experience and improve customer satisfaction through proactive monitoring and troubleshooting. Alert Birds are available to squawk & chirp when things go awry.
But, Loggly has suffered an extended outage that was caused by AWS rebooting 100% of their servers, but that was only half the time down. The other half was due to not knowing the service was down.