What is OpenTelemetry? [Everything You Need to Know]

Observability used to be a fragmented mess. You had one agent for logs, a different library for metrics, and a proprietary SDK for distributed tracing. If you wanted to switch vendors, you had to rewrite your instrumentation code from scratch. OpenTelemetry (OTel) fixed this. It has become the second most active project in the CNCF (Cloud Native Computing Foundation), right behind Kubernetes. By standardizing how applications generate and transmit telemetry data, OpenTelemetry ensures you own your data, not your vendor. This guide covers what OpenTelemetry is, how its architecture works, and why it is now the default choice for modern infrastructure. Comic explaining the power of OTel What is OpenTelemetry [in a nutshell]? OpenTelemetry is an open-source observability framework that lets you generate, collect, and export telemetry data (traces, metrics, and logs). It is not a storage backend or a visualization tool. Instead, it acts as the universal language and delivery system for you