Chaos Toolkit vs Harness Chaos Engineering

Chaos Toolkit9.3Visit Harness Chaos Engineering9.0Visit

Higher score Chaos Toolkit #1 in Chaos Engineering Platforms 9.3/10 Free plan Free plan✓ 5 of 5 features Visit Chaos Toolkit

vs

Harness Chaos Engineering #3 in Chaos Engineering Platforms 9.0/10 Free plan Free plan✓ 5 of 5 features Visit Harness

• Chaos Toolkit fits best

  Broad, low-cost multi-cloud chaos testing

• Harness Chaos Engineering fits best

  Teams wanting free hybrid cloud coverage

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Side by side

Feature	Chaos Toolkit 9.3/10 Visit ↗	Harness Chaos Engineering 9.0/10 Visit ↗
At a glance
Editor score	9.3	9.0
Ranking	#1 in Chaos Engineering Platforms	#3 in Chaos Engineering Platforms
Best for	Broad, low-cost multi-cloud chaos testing	Teams wanting free hybrid cloud coverage
Pricing model	Free	Free plan + paid
Starting price	Free	—
Free plan	✓	✓
Free trial	—	—
Deployment	Self-hosted, Desktop, Browser extension	Cloud, Self-hosted
Platforms	Web, Windows, macOS, Linux	Web
Support	Docs	Community, Docs
Integrations	12 integrations	9 integrations
Built for	Solo, Small business, Mid-market, Enterprise	Small business, Mid-market, Enterprise
Features Chaos Toolkit 5/5 · Harness Chaos Engineering 5/5
Kubernetes support	✓	✓
Cloud fault injection	✓	✓
Network fault injection	✓	✓
Experiment scheduling	✓	✓
Blast-radius controls	✓	✓
Specs
Deployment model	Self_hosted	Hybrid
Our review
Pros	Supports Kubernetes, AWS, Azure, and Google Cloud experiments Includes safeguards, controls, rollbacks, and steady-state hypotheses Offers 300+ actions and probes plus custom extensions	Free plan covers Kubernetes, AWS, Azure, GCP, VMware, and bare metal Blast-radius limits, approval gates, probes, and scheduled experiments CI/CD integration plus prebuilt faults and experiment templates
Cons	The standalone interface is a command-line toolkit Scheduling uses Kubernetes CronJobs or external automation Custom extensions require Python, HTTP, or process providers	Paid-plan pricing requires contacting Harness Free Plan includes community support rather than standard or premier support Chaos infrastructure is deployed in the target Kubernetes environment
Our verdict	Chaos Toolkit is an open-source, Python-based toolkit for developers defining and running chaos engineering experiments. Experiments are written in JSON or YAML and executed through a standalone command-line interface. The toolkit covers… Read the review →	Harness Chaos Engineering is a resilience-testing product for SRE, platform, QA, and engineering teams. It injects controlled faults into Kubernetes workloads, cloud resources, infrastructure, and network paths, then evaluates behavior… Read the review →

Strengths and trade-offs

• Chaos Toolkit — where it wins

  • Supports Kubernetes, AWS, Azure, and Google Cloud experiments
  • Includes safeguards, controls, rollbacks, and steady-state hypotheses
  • Offers 300+ actions and probes plus custom extensions

  Where it doesn't

  • The standalone interface is a command-line toolkit
  • Scheduling uses Kubernetes CronJobs or external automation
  • Custom extensions require Python, HTTP, or process providers

• Harness Chaos Engineering — where it wins

  • Free plan covers Kubernetes, AWS, Azure, GCP, VMware, and bare metal
  • Blast-radius limits, approval gates, probes, and scheduled experiments
  • CI/CD integration plus prebuilt faults and experiment templates

  Where it doesn't

  • Paid-plan pricing requires contacting Harness
  • Free Plan includes community support rather than standard or premier support
  • Chaos infrastructure is deployed in the target Kubernetes environment

• Chaos Toolkit9.3/10 · Free plan

  Broad, low-cost multi-cloud chaos testing with declarative experiments and safeguards.

  Visit Chaos ToolkitFull verdict →
• Harness Chaos Engineering9.0/10 · Free plan

  A free hybrid-cloud option with strong experiment controls and broad infrastructure coverage.

  Visit HarnessFull verdict →