LocalStack vs Wilma
LocalStack
localstack.cloudWilma
epam.github.ioSide by side
| Figure | LocalStack | Wilma |
|---|---|---|
| Price from | $2.42/mo | Free |
| Free plan | Yes | Yes |
| Free trial | Yes | — |
| Open source | Yes | — |
| Web | Yes | Yes |
| Windows | Yes | — |
| macOS | Yes | — |
| Linux | Yes | — |
| API | Yes | — |
| Self-hosted | Yes | Yes |
| Plans published | 14 | 1 |
| Spec score · Service Virtualization Software | 9.1 (#2) | 7.8 (#14) |
| Headquarters | Zurich, Switzerland | Newtown, Pennsylvania, United States |
| Integrations | Documentation covers integrations with SDKs, application frameworks, testing tools and LocalStack Extensions. | Wilma provides a Java service library through Maven Central and a .NET service library through NuGet. |
| Purpose | LocalStack simulates cloud environments on customer infrastructure so developers and AI agents can validate cloud applications before deployment. | Wilma combines a service stub with an HTTP/HTTPS transparent proxy for developing and testing applications that depend on other services. |
| Support | Standard support is best effort with no guaranteed response time and a typical 24–48 hour response during business hours; Enterprise includes custom SLAs. | The project invites users to submit issues, patches, suggestions, and feedback, and says enterprise support requests can be sent to its contact email. |
Plans
LocalStack
- Azure Public PreviewFree
- HobbyFree
- Hobby (LocalStack for AWS)Free
- Base (LocalStack for Snowflake)$29 a year
- Snowflake Base (annual)$29 a year
- Snowflake Base (monthly)$35 a month
- Base (annual)$39 a year
- Base (LocalStack for AWS)$39 a year
- Base (monthly)$45 a month
- Ultimate$89 a year
In their own words
LocalStack
LocalStack simulates cloud environments on customer infrastructure so developers and AI agents can validate applications before deployment. It currently emulates AWS and Snowflake, with AWS coverage described as 120+ services; an Azure public preview is coming soon. A typical workflow deploys application code and infrastructure-as-code resources into a local container, where teams can inspect failures and validate fixes before changing the endpoint to ship. LocalStack can run in GitHub Actions, GitLab CI, CircleCI, and Jenkins through a Docker image. The listed infrastructure-as-code tools include CDK, Terraform, and Pulumi. LocalStack is designed for development and testing, not production customer-facing applications. Hobby is free, offers 30+ emulated services and one personal sandbox, and is restricted to non-commercial use. AWS Base costs $39 a year, billed at $39 per license per month annually, or $45 per license per month billed monthly. LocalStack supports API, Linux, macOS, self-hosted, web, and Windows environments.
Wilma
Wilma is free, GPLv3-or-later software for developing and testing applications that depend on other services. It combines a service stub with an HTTP/HTTPS transparent proxy, allowing teams to capture, decode, save, and forward traffic, including two-way SSL, or generate configured responses. It can operate as a proxy, a stub, or both. JSON files define stub behavior, and configurations can be uploaded or changed through the interface or service while Wilma runs. Real-time interceptors can inspect or modify requests and responses; custom interceptors, condition checkers, and response formatters can be added, including through classes or JAR files. Message Search finds logged request-response pairs. Wilma supports unit, integration, functional, end-to-end, performance, and manual testing. It is available as Docker images, GitHub release ZIP files, or source builds. The application requires JRE 11, while Message Search requires JDK 11. Logging can be controlled and old logs deleted on schedules.