TOOL SIGNAL / ACTIVE

ghz

Bojan Djurkovic

Protocol/API Load Open Source Self-hosted

NOT YET REVIEWED · CATALOG DATA

Official site ↗ Source repo ↗
Pricing model
Free; MIT License.
First released
2018
Latest release
v0.121.0
Last verified
Answer

ghz is a command-line utility and Go package designed for benchmarking and load testing gRPC services. It can be used for local testing, debugging, and performance regression testing in automated CI environments.

What it is

ghz is a command-line utility and Go package designed for benchmarking and load testing gRPC services. It can be used for local testing, debugging, and performance regression testing in automated CI environments.

Features

  • Supports load testing for unary, streaming, and duplex gRPC calls
  • Allows input via .proto files, prebuilt protoset bundles, or server reflection
  • Provides various report output formats including CLI summary, CSV, JSON, HTML, and InfluxData
  • Supports custom data input using standard Go template variables
  • Enables Gzip compression on requests
  • Provides options for concurrency scheduling and rate limiting

Best for

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

Not the best fit when

  • Teams unwilling to operate generators, results storage, and scaling

Architecture and concurrency

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.

Fact sheet

Specs

Scripting
GoJavaScript
Protocols
gRPCHTTP/2
Operating systems
WindowsmacOSLinux
Tags
grpcgocli
Repo health
★ 3350 · last push 2026-09-01

Latest release

v0.121.0 · 2025-12-06

The v0.121.0 release was published on 2025-12-06. The release notes do not provide specific feature updates or bug fixes, only the version tag and release date.

Pricing

Open source under the Apache License 2.0.

Sources

SHOW SOURCES

LAST VERIFIED · 2026-08-11 · GROUNDED VIA EXA · CURATED BY NAVEENKUMAR NAMACHIVAYAM

Frequently asked

ANSWER-SHAPED
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.