OpenTelemetry vs Thanos: What are the differences?
OpenTelemetry: A single set of APIs, libraries, agents, and collector services to capture distributed traces and metrics from your application. It provides a single set of APIs, libraries, agents, and collector services to capture distributed traces and metrics from your application. You can analyze them using Prometheus, Jaeger, and other observability tools; Thanos: Highly available Prometheus setup with long term storage capabilities. Thanos is a set of components that can be composed into a highly available metric system with unlimited storage capacity. It can be added seamlessly on top of existing Prometheus deployments and leverages the Prometheus 2.0 storage format to cost-efficiently store historical metric data in any object storage while retaining fast query latencies. Additionally, it provides a global query view across all Prometheus installations and can merge data from Prometheus HA pairs on the fly.
OpenTelemetry and Thanos belong to "Monitoring Tools" category of the tech stack.
Thanos is an open source tool with 6.45K GitHub stars and 942 GitHub forks. Here's a link to Thanos's open source repository on GitHub.