Imposter vs Mockfly
Imposter
imposter.shMockfly
mockfly.devSide by side
| Figure | Imposter | Mockfly |
|---|---|---|
| Price from | — | €12.50/mo |
| Free plan | — | Yes |
| Free trial | — | — |
| Open source | — | — |
| Web | — | Yes |
| Windows | Yes | — |
| macOS | Yes | — |
| Linux | Yes | Yes |
| API | — | Yes |
| Self-hosted | Yes | Yes |
| Plans published | 0 | 7 |
| Spec score · API Mocking Tools | 7.6 (#15) | 9.2 (#2) |
| 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 Chrome extension captures browser requests and adds selected endpoints to a Mockfly project. |
| Intended users | The maker describes Imposter as a tool for developers and QA, including teams that want to decouple integration tests from cloud or backend systems. | Mockfly describes its users as frontend, backend, mobile, QA, and testing engineers who need shared mock APIs. |
| Purpose | Imposter runs interactive mock systems for development and QA, including before a real API is available. | Mockfly creates hosted mock REST API endpoints so teams can build and test before a backend is ready. |
Plans
Mockfly
- StarterFree
- StarterFree
- Pro€15 a month
- Team€49 a month
- Pro annual€150 a year
- Company€199 a month
- CompanyPriced on request
In their own words
Mockfly
Mockfly provides hosted mock REST API endpoints for teams building or testing before a backend is ready. An endpoint can return JSON, XML, or files such as PDFs and CSVs, and can select among several responses using rules tied to incoming requests. Mock data can use Faker.js templates or AI-generated JSON. Projects can start from OpenAPI, Swagger, Postman collection, or HAR imports; a Chrome extension can capture browser requests and add selected endpoints. Teams can share and edit mocks, inspect request logs, and review response-body history. For offline work, the mockfly-cli npm package pulls projects to serve locally. A public REST API and MCP server support programmatic mock creation and editing. Mockfly lists API, extension, Linux, self-hosted, and web platforms, and supports REST and WebSocket. The free Starter plan allows 500 requests per day, one project, four endpoints, and two responses per endpoint. Pro costs €15 a month; Team costs €49 a month; Company is listed from €199 a month.