Grafana k6

An open-source command-line load testing tool that runs test scripts written in JavaScript.

FreeOpen sourceCommand line
Official websitegithub.com

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About Grafana k6

k6 is a load testing tool for websites and APIs. You write test scenarios in JavaScript, and k6, which is written in Go, runs them from the command line to simulate traffic and report how the system under test responds.

It is aimed at developers and testers who want load tests kept as code alongside a project. The repository is actively developed by Grafana, with over 11,000 commits, example scripts, documentation and a Dockerfile for running it in a container.

Strengths

  • Test scenarios written in plain JavaScript
  • Single command-line tool, also usable in Docker
  • Large, actively maintained project

Limitations

  • Requires writing scripts; no graphical test builder in the tool itself
  • Aimed at developers rather than casual site owners

Details

Pricing
FreeThe k6 tool itself is free and open source.
License
Open source, license not stated
Developer
Grafana Labs
Platforms
Command line
How it runs
Downloadable app
Account
Not required
Works offline
Yes
Best suited for
Developers load testing websites and APIs with tests kept as code
Last verified
Added
Provenance
Facts checked against the developer's own pages and store listings, 1 sources on file.

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Software that can replace Grafana k6 for an important use case, and what changes if you switch.

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    Gatling also keeps load tests as code, with an open-source Community Edition, while CI/CD automation and deeper analysis are in the paid Enterprise Edition.

  • Artillery

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  • Vegeta

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  • Siege

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    Siege is a GPL-3.0 command-line stress tester for macOS and Linux with simpler scripting options than k6 and no graphical reports.

  • Loader.io

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    Loader.io is a closed-source hosted service, so no load generators to run yourself, but it requires an account and registering the target host.

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