Galasa
Galasa: A flexible z/OS integration-testing framework for teams comfortable with Java and self-hosting. Ranked #5 of 7 in Mainframe Testing Tools by our editors (7.8/10); pricing: Free plan; best for teams seeking open-source z/OS integration testing.
At a glance
- Editor score7.8 / 10
- PricingFree plan
- Best forTeams seeking open-source z/OS integration testing
- Free planYes
- Paid fromFree
- Automation levelAutomated
- Facts checked24 Sep 2026
Where it wins
- Automates z/OS file, batch, CICS and Db2 interactions
- Runs locally or in a shared ecosystem with parallel execution
- Supports Gherkin tests and DevOps pipeline integration
Where it doesn't
- Java test projects require developer involvement
- Shared ecosystem deployment depends on Kubernetes
- Support is centered on documentation and community
Our verdict on Galasa
Galasa is an open-source framework for writing and running automated tests against mainframe and connected systems. It is aimed at teams that need z/OS integration coverage and can work with Java test projects. Developers use Managers to interact with services including z/OS files, batch jobs, commands, CICS Transaction Server and Db2. Gherkin-based tests and 3270 terminal interaction steps extend its reach beyond service-level checks, making it relevant for integration, regression and system verification work.
Execution can happen locally or in a shared Galasa Ecosystem. The ecosystem centralizes configuration, results, logs and test artifacts, and supports parallel test runs; its deployment is Kubernetes-based. That provides a route from individual development to shared team execution, while GitHub, JMeter and Selenium are among its listed integrations. Teams can also integrate test execution into DevOps pipelines. This makes Galasa a fit for organizations connecting mainframe testing with broader delivery workflows, though ecosystem operation adds infrastructure considerations compared with local runs.
Galasa is distributed as an open-source project rather than a priced hosted subscription, so teams should weigh adoption around engineering capacity and operating needs rather than subscription tiers. Documentation and community are its support channels. Choose it when open-source control, mainframe-specific managers and automated pipeline runs matter, and the team is prepared to own Java-based test development and deployment. A team looking for a managed service, a low-code authoring experience or vendor-led support should consider alternatives instead.
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Galasa pricing
Galasa fact sheet
| Free plan | Yes |
|---|---|
| Paid from | Free |
| Test types | integration, regression, application, system verification, Gherkin behavior-driven, performance, web UI |
| Mainframe platforms | z/OS; CICS Transaction Server; Db2; Kubernetes |
| Automation level | Automated |
| Test data support | Yes |
| CI/CD integration | Yes |
| Deployment options | Both |
| Deployment | Self-hosted, Desktop |
| Platforms | Windows, macOS, Linux |
| Support | Docs, Community |
| Built for | Small business, Mid-market, Enterprise (editorial estimate) |
| Integrations | 6 integrations: CICS Transaction Server, Db2, GitHub, JMeter, Selenium, Kubernetes |
| Pricing | Free plan |
| Website | galasa.dev |
| Facts checked | 24 Sep 2026 |
Galasa integrations
Galasa lists 6 integrations on its own site.
- CICS Transaction Server
- Db2
- GitHub
- JMeter
- Selenium
- Kubernetes
Alternatives to Galasa
- IBM Test Accelerator for ZA broad IBM Z testing framework for teams automating COBOL and functional tests.9.1
- IBM Z Unit TestA focused z/OS unit-testing tool, but IBM marks ZUnit deprecated and recommends its successor.8.8
- Rocket SmartTestInteractive testing, transaction checks and coverage analysis for on-premises mainframe teams.8.5
Galasa vs the competition
- Galasa vs IBM Test Accelerator for Z
- Galasa vs IBM Z Unit Test
- Galasa vs Rocket SmartTest
- Galasa vs IBM Workload Simulator for z/OS and OS/390
- Galasa vs Infotel Application Parallel Testing
- Galasa vs ACCELQ
Compare Galasa with any tool side by side →
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Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026
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