Bosun is an open-source tool designed for monitoring and alerting. Its primary function is to provide real-time insights into the health and performance of your IT systems, helping technology professionals manage systems efficiently by sending alerts on anomalies detected based on user-defined criteria. Developed originally by Stack Exchange, Bosun integrates seamlessly with time series data from sources like Graphite, OpenTSDB, and Prometheus, allowing for flexible and powerful query conditions. Its custom scripting languages enable precise control over how data is processed, evaluated, and alerted upon. Bosun is well-suited for organizations looking to implement robust monitoring solutions capable of handling complex, dynamic environments.