# PragmaticFlow/NBomber

Distributed load-testing framework for .NET. Create distributed load test scenarios entirely using plain C# or F#. It is designed to test any system regardless of the protocol or a semantic model (Pull/Push).

Repository: https://github.com/PragmaticFlow/NBomber
Canonical: https://ross.abutalabs.com/products/nbomber
Homepage: https://nbomber.com
Language: CSS
License Family: other
Topics: load-testing, performance-testing, integration-testing, fsharp, dotnet, csharp
Last push: 2026-08-17T13:22:46+00:00

## Health v2 (maintenance only)
Score: 94/100 (v2, computed 2026-09-02T17:46:02.011165+00:00)
- activity 98, release rhythm 86, longevity 100
- inputs: {"age_days": 2981, "days_push": 16, "days_rel": 16, "gap_med": 45.0, "n_releases_24m": 13}
- flags: no_license
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 2238, forks 141 (observed 2026-08-28T04:06:29.585411+00:00)

## What it is
NBomber is a distributed load-testing framework for .NET that lets you write load test scenarios in plain C# or F# with no dependency on protocol (HTTP, WebSockets, gRPC, AMQP, MQTT, SQL) or semantic model (Pull/Push). It supports distributed cluster execution, load simulations, real-time reporting sinks (InfluxDB, TimescaleDB, Grafana, OpenTelemetry), HTML/CSV reports, and CI/CD integration via xUnit/NUnit runners.

## Use cases
- load test an HTTP API with thousands of concurrent requests
- stress test a WebSocket or gRPC service
- run distributed load tests across a cluster of machines
- catch performance regressions in CI/CD pipelines
- simulate realistic production workloads with dynamic load simulations
- stream load test metrics to Grafana or InfluxDB for real-time monitoring
- convert integration tests into load tests
- load test databases like Redis, MongoDB, or SQL

## When to choose
- your team works in .NET and wants load tests as code in C# or F#
- you need protocol-agnostic load testing beyond HTTP (WebSockets, gRPC, AMQP, MQTT, databases)
- you want distributed load generation across multiple agents or Kubernetes
- you need real-time metrics streaming to observability platforms like Grafana or Datadog
- you want to debug load tests in your IDE like normal code

## When to avoid
- you need a no-code UI-only load testing tool for non-developers
- your stack is not .NET and you prefer a language-native tool like k6 (JavaScript) or Locust (Python)
- you only need simple HTTP smoke tests with minimal setup
- you require an open-source license for the NBomber Studio management tool in an organization (it requires a paid license)

## Facets
- artifact type: framework
- maturity: active
- function: load-testing, benchmarking, testing, monitoring
- domain: performance, testing, developer-tools
- platform: dotnet, cross-platform, cloud
- tags: load-testing, csharp, fsharp, distributed-testing, performance-testing, reporting-sinks, grafana, influxdb, http, websockets, grpc, mqtt, amqp, devops, docker, kubernetes

## Member repositories
- PragmaticFlow/NBomber (main) score 94

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:06:29.585411+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 2026-08-30T02:44:12.734391+00:00, confidence not recorded.
  - readme: https://github.com/PragmaticFlow/NBomber (fetched 2026-08-28T04:06:29.585411+00:00, sha a3b37d082ac4)
  - homepage: https://nbomber.com (fetched 2026-08-29T10:24:50.415105+00:00, sha ac5760f6f05b)
  - site_page: https://nbomber.com/docs/getting-started/overview (fetched 2026-08-29T10:24:50.424586+00:00, sha ecc62904b2cd)
  - site_page: https://nbomber.com/docs/getting-started/roadmap (fetched 2026-08-29T10:24:50.426667+00:00, sha 9f9e2b0de5d8)
  - site_page: https://nbomber.com/docs/nbomber-studio/loadtests-in-k8s/overview (fetched 2026-08-29T10:24:50.428650+00:00, sha 8712832e58c3)
  - site_page: https://nbomber.com/docs/reporting/reports (fetched 2026-08-29T10:24:50.431483+00:00, sha 32cd774a2f9d)
  - site_page: https://nbomber.com/docs/nbomber-studio/overview (fetched 2026-08-29T10:24:50.440969+00:00, sha 1559870fd935)
  - site_page: https://nbomber.com/docs/reporting/realtime/influx-db (fetched 2026-08-29T10:24:50.442868+00:00, sha 7d2bd4884e7e)
  - site_page: https://nbomber.com/docs/reporting/realtime/timescale (fetched 2026-08-29T10:24:50.444992+00:00, sha fef1027f99f4)
  - site_page: https://nbomber.com/docs/reporting/realtime/grafana (fetched 2026-08-29T10:24:50.446910+00:00, sha 2362c1058499)
- Data as of 2026-08-30T08:39:29.467469+00:00.