Imposter vs Mockzilla
Imposter
imposter.shMockzilla
mockzilla.orgSide by side
| Figure | Imposter | Mockzilla |
|---|---|---|
| Price from | — | $10/mo |
| Free plan | — | Yes |
| Free trial | — | Yes |
| Open source | — | Yes |
| Web | — | Yes |
| Windows | Yes | Yes |
| macOS | Yes | Yes |
| Linux | Yes | Yes |
| API | — | Yes |
| Self-hosted | Yes | Yes |
| Plans published | 0 | 9 |
| Spec score · API Mocking Tools | 7.6 (#15) | 8.9 (#5) |
| Integrations | The CLI documentation describes embedding Imposter in JVM and Node.js tests, and using GitHub Actions or other CI/CD platforms including GitLab, CircleCI, Jenkins, Azure Pipelines, and Bitbucket. | The site lists a GitHub Action and an MCP server for coding agents; its CLI page gives setup instructions for Claude and Gemini. |
| Request validation | The OpenAPI plugin can validate incoming request parameters, headers, and bodies against the specification. | Incoming requests can be validated against the OpenAPI specification. |
Plans
Mockzilla
- FreeFree
- FreeFree
- Hobby$10 a month
- Hobby$10 a month
- Starter$20 a month
- Starter$20 a month
- Pro$50 a month
- Pro$50 a month
- EnterprisePriced on request
In their own words
Mockzilla
Mockzilla turns OpenAPI specifications or plain JSON files into hosted mock APIs for frontend work, integration tests, and demos. It generates responses from OpenAPI schemas and can validate requests against the specification. Users can inject latency or errors at service or endpoint level to exercise retry and fallback behavior. A proxy can forward requests to a real backend while supplying mock responses for routes that backend does not serve. Its GitHub Action creates a mock URL for each pull request, updates it on pushes, and cleans it up when the branch is gone. Mockzilla records request status and timing, and supports replaying individual requests or sets of requests. The CLI is MIT-licensed, works offline, and can run on a laptop or in CI; hosted cloud features are optional. The site also lists a GitHub Action and MCP server, with CLI setup instructions for Claude and Gemini. The Free plan is free, but API access is unavailable and request history lasts two hours. Hobby costs $10 a month. Uploaded content must not contain personally identifiable information, real financial data, health records, credentials, or other sensitive data.