# nGrinder

> nGrinder is an open source, self-hosted load testing tool from Naver, scripted in Groovy, Jython, Python.

- Canonical: https://perf.jmeter.ai/tools/ngrinder/
- Official: https://naver.github.io/ngrinder/
- Source: https://github.com/naver/ngrinder
- Vendor: Naver
- Category: Load Testing
- License: Open Source — Free; Apache License 2.0.
- Deployment: Self-hosted
- Status: Active
- Scripting: Groovy, Jython, Python
- Protocols: HTTP, HTTPS
- OS support: Windows, macOS, Linux
- First released: 2012
- Latest release: 3.5.9-p1 (2024-06-13)
- Last verified: 2026-08-15

## What it is
nGrinder is an open-source performance testing platform originally from Naver. It provides script creation, distributed execution, monitoring hooks, and result reporting, historically related to The Grinder ecosystem with a web-based controller experience.

## Choose it when
- Load Testing scenarios across typical web and service stacks
- Teams that prefer open-source licensing and self-hosting options
- Groups comfortable scripting in Groovy, Jython, Python

## Look elsewhere when
- Teams unwilling to operate generators, results storage, and scaling

## Architecture
nGrinder is commonly operated as self-hosted software with scenario authoring in Groovy, Jython, Python. Concurrency and distribution depend on how you size workers or injectors.

## Pricing
Open-source (Apache License 2.0). No pricing information exists as it is a free, open-source software project.

## Compare
- [nGrinder alternatives](https://perf.jmeter.ai/alternatives/ngrinder/)

## FAQ
### Who is nGrinder for?
nGrinder is best for engineers designing load, stress, and performance tests for web and service systems. It is open source, so teams can self-host and extend it. Vendor: Naver. Deployment model: self-hosted. Free; Apache License 2.0. Confirm details against the official site and a short proof-of-concept in your environment.

### How does nGrinder differ from Apache JMeter?
Compared with Apache JMeter, scripting centers on Groovy, Jython, Python rather than Java, Groovy. nGrinder lists protocols HTTP, HTTPS; Apache JMeter lists HTTP, HTTPS, JDBC, JMS, FTP, TCP. Status is active versus active. Use the Test Rig to compare full specs side by side before a proof-of-concept.

### What scripting language and concurrency model does nGrinder use?
nGrinder uses Groovy, Jython, Python for scripting or scenario definition. Runtime model: code-first scenarios where virtual users execute scripted behavior under load. OS support: Windows, macOS, Linux. Protocols: HTTP, HTTPS. Match these to how your team already authors tests and which systems you must drive under load.

### What is the cloud or enterprise path for nGrinder?
nGrinder is primarily self-hosted; teams typically run generators on their own machines, CI runners, or private cloud. Plan for generator capacity, network access to targets, and result storage yourself. As open source, commercial support or hosted siblings may exist separately. Check the official site. Pricing note: Free; Apache License 2.0.

### What are known limitations of nGrinder?
nGrinder limitations to weigh: self-hosted tools require you to provision, scale, and observe load generators yourself. Status: active. Always validate against your target protocols and scale with a proof-of-concept. Confirm details against the official site and a short proof-of-concept in your environment.

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Curated by NaveenKumar Namachivayam (QAInsights) · methodology: https://perf.jmeter.ai/about/#methodology · corrections: https://github.com/QAInsights/Performance-Testing-Tools/issues/new?title=Tool%20submission%3A%20&body=Tool%20name%3A%20%0AOfficial%20URL%3A%20%0AWhat%20should%20be%20added%20or%20corrected%3F%20%0A