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If you are familiar with instrumenting applications, you may have heard of OpenMetrics, OpenTracing, and OpenCensus. These projects aim to create standards for application performance monitoring and collecting metric data. Although the projects do overlap in terms of their goals, they each take a different approach to observability and instrumentation. In this post, we’ll provide an introduction to all three projects, along with some key differentiators of each, and how they best support application monitoring.