Chaos Toolkit

Repository: chaostoolkit/chaostoolkit Homepage

Metrics as of 2026-09-22, from the GitHub or GitLab API of each repository. Refreshed monthly.

What Chaos Toolkit is

Chaos Toolkit is a command-line tool for writing and running chaos engineering experiments. Extensions connect it to target platforms, and users can write their own. The project positions it for cloud environments, datacenters and CI/CD pipelines. Experiments are declared in files such as experiment.json and run with the chaos run command. An experiment can declare its Python package dependencies, which the tool prepares with uv before running. Setting a Python version or the isolated flag runs the experiment in an isolated environment. It requires Python 3.12 or later and installs with uv or pip.

Written from the project's README, read 2026-09-22.

Category: Chaos and resilience
License: Apache-2.0
Language: Python
Changelog: Releases on GitHub

Repository metrics

Repository metrics
Stars	2,028¹
Forks	206¹
Open issues and PRs	3¹
Contributors	21¹
Commits in the last 90 days	7¹
Last commit	2026-08-09¹
Last release	1.20.0, 2026-08-08¹
Fetched	2026-09-22

¹ Fetched from the GitHub or GitLab API on 2026-09-22. Hover a value for its own date.

Status

activeLast commit within 90 days of the fetch date.

Computed from the last commit date and the archive flag on the fetch date. See the status rules.

Alternatives

Listed chaos and resilience tools, same primary language first, then by GitHub stars. Each line gives one fact from the tool's documentation where it differs from Chaos Toolkit's, with its source.

ChaosBlade: Target environments: Host environments and Kubernetes clusters. source: Docs: ChaosBlade introduction
Krkn: Target environments: Kubernetes and OpenShift clusters; node scenarios through cloud APIs. source: Docs: Chaos Scenarios
Chaos Monkey: Target environments: Spinnaker backends: AWS, Google Compute Engine, Azure, Kubernetes, Cloud Foundry. source: README
Toxiproxy: Target environments: TCP connections between an application and its services, routed through the proxy. source: README
Chaos Mesh: Target environments: Kubernetes; remote clusters managed from a management cluster. source: README
LitmusChaos: Target environments: Kubernetes resources; cloud platforms such as AWS, GCP and Azure; VMware. source: Docs: Litmus Experiments
Pumba: Target environments: Docker, containerd and Podman containers on Linux. source: README
kube-monkey: Target environments: Kubernetes clusters. source: README

How to install

uv tool install chaostoolkit

From README, read 2026-09-22.

Questions

Is Chaos Toolkit open source?

Yes. Chaos Toolkit is released under Apache-2.0, an OSI-approved license, as reported by the GitHub API on 2026-09-22.

Is Chaos Toolkit maintained?

On 2026-09-22, the last commit to the default branch was on 2026-08-09, so the listed status is active. Rule: Last commit within 90 days of the fetch date.

How many GitHub stars does Chaos Toolkit have?

2,028 stars on 2026-09-22, from the GitHub API. The number is refreshed at each monthly update.

What language is Chaos Toolkit written in?

The repository's primary language, as reported by the GitHub API, is Python.

How do I install Chaos Toolkit?

The README gives this command: uv tool install chaostoolkit

Sources

GitHub REST API: repository, read 2026-09-22
GitHub REST API: commits, read 2026-09-22
GitHub REST API: latest release, read 2026-09-22
GitHub REST API: contributors, read 2026-09-22
README, read 2026-09-22