# ghz

> ghz is an open source, self-hosted protocol and API load tool from Bojan Djurkovic, scripted in Go, JavaScript.

- Canonical: https://perf.jmeter.ai/tools/ghz/
- Official: https://ghz.sh/
- Source: https://github.com/bojand/ghz
- Vendor: Bojan Djurkovic
- Category: Protocol/API Load
- License: Open Source — Free; MIT License.
- Deployment: Self-hosted
- Status: Active
- Scripting: Go, JavaScript
- Protocols: gRPC, HTTP/2
- OS support: Windows, macOS, Linux
- First released: 2018
- Latest release: v0.121.0 (2025-12-06)
- Last verified: 2026-08-11

## What it is
ghz sends configurable gRPC requests and reports latency and status metrics. It supports scenarios, metadata, TLS, and output formats for automation.

## Choose it when
- API and protocol throughput or latency campaigns
- Teams that prefer open-source licensing and self-hosting options
- Groups comfortable scripting in Go, JavaScript

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

## Architecture
ghz is commonly operated as self-hosted software with scenario authoring in Go, JavaScript. Concurrency and distribution depend on how you size workers or injectors.

## Pricing
Open source under the Apache License 2.0.

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

## FAQ
### Who is ghz for?
ghz is best for engineers focused on API and protocol-level throughput and latency. It is open source, so teams can self-host and extend it. Vendor: Bojan Djurkovic. Deployment model: self-hosted. Free; MIT License. Confirm details against the official site and a short proof-of-concept in your environment.

### How does ghz differ from Artillery?
Compared with Artillery, scripting centers on Go, JavaScript rather than JavaScript, TypeScript. ghz lists protocols gRPC, HTTP/2; Artillery lists HTTP, HTTPS, WebSocket, Socket.IO, MQTT. 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 ghz use?
ghz uses Go, JavaScript for scripting or scenario definition. Runtime model: code-first scenarios where virtual users execute scripted behavior under load. OS support: Windows, macOS, Linux. Protocols: gRPC, HTTP/2. 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 ghz?
ghz 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; MIT License.

### What are known limitations of ghz?
ghz 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