1. 1. Data collection and monitoring: Prometheus is a powerful monitoring and alerting system that collects metrics from various sources, including services and applications, while Supervisord is a process control system that monitors and manages the execution of processes.
2. 2. Data storage: Prometheus stores metrics in a time-series database that allows for efficient querying and analysis, while Supervisord does not store any data and relies on external systems for data storage.
3. 3. Alerting: Prometheus has a built-in alerting system that allows users to define alert rules and send notifications when certain conditions are met, whereas Supervisord does not have native alerting capabilities and requires integration with external alerting systems.
4. 4. Scaling: Prometheus is designed to be horizontally scalable, meaning it can handle large amounts of data and traffic by adding more instances, while Supervisord is primarily used in single-server setups and does not have built-in mechanisms for horizontal scaling.
5. 5. Service discovery: Prometheus supports service discovery, which allows it to automatically discover and monitor new services and applications, while Supervisord requires manual configuration for each process to be monitored.
6. 6. Web interface and user interface: Prometheus provides a web-based user interface for querying and visualizing metrics, making it easier for users to analyze and troubleshoot issues, while Supervisord has a command-line interface and does not provide a graphical user interface.

In Summary, Prometheus and Supervisord differ in terms of their data collection and monitoring capabilities, data storage, alerting, scalability, service discovery, and user interface.