OpenMetrics aims to create a standard format for exposing metric data, while OpenTracing and OpenCensus focus on creating a standard for distributed tracing. The projects share similarities in their goals but take different approaches. OpenMetrics uses the Prometheus exposition format as its starting point, aiming to include new enhancements and improvements. OpenTracing provides a standardized API for tracing, with a comprehensive interface between traces. OpenCensus is a platform for metric collection and tracing, offering a collection of language-specific libraries with APIs for sampling and metric collection. Both projects are vendor-neutral but have differences in their approaches and supported backends. The OpenMetrics project is currently part of the Cloud Native Computing Foundation (CNCF) sandbox, while OpenTracing and OpenCensus are part of the CNCF as well. The two tracing projects share similarities in their goals but differ in their approach to distributed tracing, with OpenTracing focusing on a standardized API for tracing and OpenCensus providing a platform for metric collection and tracing.