Gremlin vs Reliably

Gremlin8.9Visit Reliably8.7Visit

Higher score Gremlin #4 in Chaos Engineering Platforms 8.9/10 Pricing on request · 30-day trial Free trial✓ 5 of 5 features Visit Gremlin

vs

Reliably #6 in Chaos Engineering Platforms 8.7/10 Free plan Free plan✓ 5 of 5 features Visit Reliably

• Gremlin fits best

  Enterprise teams needing deep managed chaos

• Reliably fits best

  Teams wanting a guided chaos management layer

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Side by side

Feature	Gremlin 8.9/10 Visit ↗	Reliably 8.7/10 Visit ↗
At a glance
Editor score	8.9	8.7
Ranking	#4 in Chaos Engineering Platforms	#6 in Chaos Engineering Platforms
Best for	Enterprise teams needing deep managed chaos	Teams wanting a guided chaos management layer
Pricing model	Paid	Free plan + paid
Starting price	—	£40/mo
Free plan	—	✓ (best)
Free trial	30 days	—
Deployment	Cloud, Self-hosted	Cloud, Self-hosted
Platforms	Web, Windows, Linux	Web, Windows, Linux
Support	Email, Phone, Community, Docs	Email, Docs
Integrations	12 integrations	3 integrations
Built for	Mid-market, Enterprise	Small business, Mid-market, Enterprise
Features Gremlin 5/5 · Reliably 5/5
Kubernetes support	✓	✓
Cloud fault injection	✓	✓
Network fault injection	✓	✓
Experiment scheduling	✓	✓
Blast-radius controls	✓	✓
Specs
Deployment model	Hybrid	Hybrid
Our review
Pros	Controlled experiments across hosts, containers, Kubernetes, and serverless Health checks, automatic halt, rollback, and blast-radius controls Reliability scores, reporting, scenarios, APIs, and broad integrations	More than 300 actions and probes for experiment design Runs through cloud, GitHub Actions, CLI, Docker, and Kubernetes Free plan includes unlimited custom and GitHub executions
Cons	Paid pricing requires contacting sales There is no free plan Fault Injection is also offered as a standalone product	Free plan is limited to one team member Free plan includes only five custom experiments Start limits cloud execution to 300 minutes per month
Our verdict	Gremlin is a chaos engineering and reliability platform for SRE, platform, and engineering teams. It supports controlled fault injection across services, hosts, containers, Kubernetes resources, and serverless workloads. Teams can run… Read the review →	Reliably is a resilience engineering platform for software and operations teams that need to plan, run, schedule, and review Chaos Toolkit experiments. Its experiment builder, reusable templates, JSON import, execution journals, timelines,… Read the review →

Strengths and trade-offs

• Gremlin — where it wins

  • Controlled experiments across hosts, containers, Kubernetes, and serverless
  • Health checks, automatic halt, rollback, and blast-radius controls
  • Reliability scores, reporting, scenarios, APIs, and broad integrations

  Where it doesn't

  • Paid pricing requires contacting sales
  • There is no free plan
  • Fault Injection is also offered as a standalone product

• Reliably — where it wins

  • More than 300 actions and probes for experiment design
  • Runs through cloud, GitHub Actions, CLI, Docker, and Kubernetes
  • Free plan includes unlimited custom and GitHub executions

  Where it doesn't

  • Free plan is limited to one team member
  • Free plan includes only five custom experiments
  • Start limits cloud execution to 300 minutes per month

• Gremlin8.9/10 · Pricing on request · 30-day trial

  A broad managed chaos platform for controlled failure testing across modern infrastructure.

  Visit GremlinFull verdict →
• Reliably8.7/10 · Free plan

  A guided chaos management layer with broad execution options and a free entry tier.

  Visit ReliablyFull verdict →