LocalStack vs Servirtium
LocalStack
localstack.cloudServirtium
servirtium.devSide by side
| Figure | LocalStack | Servirtium |
|---|---|---|
| Price from | $2.42/mo | — |
| Free plan | Yes | — |
| Free trial | Yes | — |
| Open source | Yes | — |
| Web | Yes | — |
| Windows | Yes | — |
| macOS | Yes | Yes |
| Linux | Yes | Yes |
| API | Yes | Yes |
| Self-hosted | Yes | Yes |
| Plans published | 14 | 0 |
| Spec score · Service Virtualization Software | 9.1 (#2) | 7.3 (#18) |
| Integrations | Documentation covers integrations with SDKs, application frameworks, testing tools and LocalStack Extensions. | The HAR bridge names Chrome DevTools, Fiddler, Charles, mitmproxy and Postman as sources of captures it can convert. |
| Purpose | LocalStack simulates cloud environments on customer infrastructure so developers and AI agents can validate cloud applications before deployment. | Servirtium records HTTP conversations from tests and replays them offline without calling the real service. |
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.
Servirtium
Servirtium is an open-source testing library and command-line tool for recording HTTP interactions and replaying them offline. Saved interactions, called tapes, use readable Markdown that can include requests, responses, headers and bodies, making them shareable across languages and reviewable in Git diffs. A native record-and-replay engine has bindings for Go, Python, Java, .NET, Rust, Ruby, JavaScript and TypeScript, Dart, PHP, Haskell, Elixir, Pharo, Nim, Zig, Lua, Erlang and Gleam. It works with any unit-test or specification framework. The standalone CLI can serve tapes as HTTP stubs, lint them, and import or export HTTP Archive files, including captures from Chrome DevTools, Fiddler, Charles, mitmproxy and Postman. Redaction and tape normalization address transient values such as IDs and timestamps. Playback requires matching request headers and bodies unless masking is applied. Servirtium targets test automation, not production service replacement, and is available for API, Linux, macOS and self-hosted use.