Gremlin is a reliability management platform that engineering teams use to test the resilience of their systems. Its core is chaos engineering: injecting failures in a controlled way, such as unavailable services or network latency, to find weak points before they hit production. Gremlin also offers reliability scoring, detection of dependencies and risks, and disaster recovery testing. The service runs as SaaS; a Private Edition that runs inside your own network is also available.
Gremlin Inc. is a US company and is subject to US law. According to its privacy policy, data is stored and processed in the United States, and its security page states that the service runs on AWS. Gremlin states that it complies with the GDPR through a data processing agreement and standard contractual clauses. The software is not open source. European organisations that run failure tests on sensitive systems may consider the Private Edition to keep data under their own control.