AWS Fault Injection Service is a solid starting point for fault injection on AWS. Gremlin covers AWS and everything else — with reliability scoring, org-wide management, and DR testing. Here's how they compare.
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AWS FIS is a capable fault injection tool. But the right choice depends on what you actually need.
FIS is scoped exclusively to AWS. If you run workloads on-prem, use Azure or GCP alongside AWS, or have bare metal, FIS can't test those systems. Gremlin covers AWS plus everything else.
FIS runs fault injection experiments. Gremlin does that plus reliability scoring, passive risk detection, org-wide standardization, and executive reporting.
FIS charges per action-minute. At enterprise scale with hundreds of services testing regularly, costs become unpredictable and can create incentives to test less. Gremlin is per-agent with unlimited tests.
Where fault injection ends and reliability management begins.
Both tools have strengths. Here's where they differ most.
One of the largest banks in the world used Gremlin to go from running 4,000 distinct DR tests manually to completing full disaster recovery testing in a tenth of the time — a 90% reduction.
At a Fortune 500 insurer
At a top-5 US bank
At a global auto parts retailer
During 100M-customer migration
Gremlin allowed us to launch our new platform for Black Friday with zero major incidents.
“We developed our team's expertise to handle issues that other teams couldn't test. At the same time, we championed Chaos Engineering, demonstrating its value in rapidly evaluating various scenarios.”
Lead Performance Engineer
Sephora
Honest guidance to help you choose the right tool for your team.
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