Know your application-level reliability

Measure, manage, and improve reliability for Kubernetes, serverless, and service mesh applications—no infrastructure access required.

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Top Fortune 500 organizations worldwide trust Gremlin

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See how easy it is to test and manage serverless reliability with Failure Flags.

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See your true application-level reliability

Measure, manage, and improve the reliability of your applications without having to change application code. Gremlin Failure Flags gives engineering teams visibility into application-level failures so they can measure, manage, and improve reliability without impacting application code.

Get visibility into your managed applications

Run application-level reliability tests, even on managed services, without any code changes.
Uncover reliability risks that infrastructure-level testing can’t detect.
Get predictive reliability metrics for application-level failures instead of using backwards-facing data.

Scale reliability throughout your software stack

Run application and infrastructure-level tests for full-stack coverage.
View real-time application reliability metrics including throughput, errors, and latency.
Bundle application and infrastructure tests for a single, comprehensive reliability testing harness.

Standardize reliability across your organization

Tests your applications against common failure modes using pre-built and custom-built tests.
Standardize your teams’ testing practices with shared test suites.
Track application reliability alongside infrastructure reliability for full-stack coverage and reporting.

Test what matters most

Latency	Introduce delays and jitter into network traffic to test your application’s response times and blocking behaviors.
Exceptions	Simulate errors found in production, trigger specific error-handling methods, and test your function’s ability to recover from faults.
Data integrity	Test your application’s ability to handle malformed or unexpected data.
Bring your own	Add custom code branches that only run when a test is active. Run a stress test, inject application-specific error codes, start performance tests—you have full control.

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How does Failure Flags work?

The Failure Flags sidecar runs alongside your application code. Application network traffic is proxied through the container.
When you run a Gremlin test, the sidecar applies the test impact to your traffic to simulate latency, errors, outages, and other failure modes.
The Failure Flags sidecar reports application metrics back to Gremlin, giving you direct visibility into reliability before, during, and after the test.

Shift from observing to improving

Gremlin enables teams to proactively improve reliability at every stage of maturity.

Experimenting

Custom Chaos Tests & Experiments

Robust, customizable chaos tests to safely replicate any incident scenario.

Standardizing

Standardized Reliability Tests

Pre-built test suite to cover the most common reliability risks. Get started in minutes.

Scaling

Automated & Scaled Reliability Programs

Standardized scoring tools to identify and prioritize risks, and build reliability programs.

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