# open-telemetry/opentelemetry-dotnet

The OpenTelemetry .NET Client

Repository: https://github.com/open-telemetry/opentelemetry-dotnet
Canonical: https://ross.abutalabs.com/products/opentelemetry-dotnet
Homepage: https://opentelemetry.io
Language: C#
License: Apache-2.0
License Family: permissive
Topics: telemetry, distributed-tracing, asp-net-core, metrics, asp-net, opentelemetry, netcore, instrumentation-libraries, ilogger, iloggerprovider, logging, otlp
Last push: 2026-08-26T14:59:51+00:00

## Health v2 (maintenance only)
Score: 95/100 (v2, computed 2026-09-03T02:20:16.233290+00:00)
- activity 99, release rhythm 86, longevity 100
- inputs: {"age_days": 2675, "days_push": 7, "days_rel": 12, "gap_med": 37.5, "n_releases_24m": 15}
- flags: none
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 3743, forks 895 (observed 2026-08-28T04:08:16.003498+00:00)

## What it is
The official OpenTelemetry SDK and API implementation for .NET, providing vendor-neutral instrumentation for traces, metrics, and logs. It supports .NET and .NET Framework applications and exports telemetry via OTLP or other exporters to any observability backend.

## Use cases
- instrument a .NET application with distributed tracing
- collect metrics from ASP.NET Core services
- export logs and traces to Jaeger or Prometheus
- add observability to microservices without vendor lock-in
- correlate traces, metrics, and logs across services
- send telemetry via OTLP to an observability backend

## When to choose
- you need standards-based, vendor-neutral telemetry in .NET apps
- you want to instrument traces, metrics, and logs with one framework
- you need to switch observability backends without changing instrumentation code
- you are building cloud-native or microservices on .NET

## When to avoid
- you need a full observability backend with storage and visualization - OpenTelemetry only generates and exports data
- you are on .NET Framework 3.5, which is unsupported
- you want zero-code instrumentation only - this repo is the SDK/API for code-based instrumentation

## Facets
- artifact type: library
- maturity: stable
- function: tracing, monitoring, logging, sdk
- domain: monitoring, microservices, developer-tools
- platform: dotnet, cross-platform, windows
- tags: opentelemetry, telemetry, metrics, distributed-tracing, otlp, observability, asp-net-core, instrumentation, devops, linux, macos

## Member repositories
- open-telemetry/opentelemetry-dotnet (main) score 95

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:08:16.003498+00:00.
- Health v2: computed from the inputs above; adoption is never an input.
- Inferred fields (summary, facets, guidance): AI-extracted, prompt v1, taxonomy v1, on 2026-08-29T18:29:05.508732+00:00, confidence not recorded.
  - readme: https://github.com/open-telemetry/opentelemetry-dotnet (fetched 2026-08-28T04:08:16.003498+00:00, sha d8af324adbd6)
  - homepage: https://opentelemetry.io (fetched 2026-08-29T09:23:25.971017+00:00, sha 51756d27c4f1)
  - site_page: https://opentelemetry.io/docs (fetched 2026-08-29T09:23:25.980990+00:00, sha 06566227bba9)
  - site_page: https://opentelemetry.io/docs/what-is-opentelemetry (fetched 2026-08-29T09:23:25.983224+00:00, sha dd58475f7d30)
  - site_page: https://opentelemetry.io/docs/demo (fetched 2026-08-29T09:23:25.985209+00:00, sha 03a34a004b8f)
  - site_page: https://opentelemetry.io/docs/concepts/signals/traces (fetched 2026-08-29T09:23:25.986900+00:00, sha 123b7f8bc630)
  - site_page: https://opentelemetry.io/docs/concepts/signals/metrics (fetched 2026-08-29T09:23:25.988762+00:00, sha 5fe9fc342c92)
  - site_page: https://opentelemetry.io/docs/concepts/signals/logs (fetched 2026-08-29T09:23:25.990603+00:00, sha 126e1fa6c0a2)
  - site_page: https://opentelemetry.io/docs/concepts/signals/baggage (fetched 2026-08-29T09:23:25.992295+00:00, sha fc18d0d07d4b)
  - site_page: https://opentelemetry.io/docs/concepts/instrumentation/zero-code (fetched 2026-08-29T09:23:25.993837+00:00, sha c811260b8c51)
- Data as of 2026-08-30T08:39:29.467469+00:00.