Side by side
Imposter vs Mockzilla
Both stand on api mocking tools. Which one you can start free with, which one lets you read the code, and what each costs once you pay.
Free plan LinuxMacSelf-hosted+1
Choose Imposter if your development or QA workflow needs configurable API mocks, request validation, data capture, or endpoint proxying. Its open-source format and multiple run modes fit several test setups. Consider the Docker image contents when choosing between the core image and the all image.
Visit Imposter Free plan Open source APILinuxMac+3
Mockzilla offers both hosted mock APIs and an offline CLI, with request validation, fault simulation, and pull-request environments. Note the Free plan's API and history limits, and do not upload sensitive data.
Visit MockzillaThe facts
| Imposter | Mockzilla | |
|---|---|---|
| Free plan | Yes | Yes |
| Open source | Not published | Yes |
| Runs on | Linux, Mac, Self-hosted, Windows | API, Linux, Mac, Self-hosted, Web, Windows |
| Lowest paid plan | Not published | Hobby: $10 a month |
| Plans published | None | 5 |
| Maker | Not published | Not published |
| Website | imposter.sh | mockzilla.org |
| On api mocking tools | #5 of 26 | #1 of 26 |
Imposter: what it does well
- Creates mock APIs from OpenAPI files, WSDL files, or REST endpoints.
- Supports request-dependent responses and scripting in JavaScript, Groovy, or Java.
- Validates requests against an OpenAPI specification.
- Can capture request data or proxy an existing endpoint.
- Runs standalone or embedded in JVM and Node.js tests.
What to know first
- The core Docker image includes only OpenAPI, REST, and SOAP plugins.
- The all Docker image includes every plugin but has the most dependencies.
Mockzilla: what it does well
- Imports OpenAPI specifications and plain JSON files
- Simulates latency and errors for testing retries
- Pull request action manages mock URLs by branch
- Offline MIT-licensed CLI can run in CI
- Supports request replay with status and timing
What to know first
- Free plan has no API access
- Free request history lasts 2 hours
- Uploaded content must not contain sensitive data
- Hobby costs $10 a month
Alternatives to Imposter Alternatives to Mockzilla The whole list