Mockfly vs Pretender.js
Mockfly
mockfly.devPretender.js
github.comSide by side
| Figure | Mockfly | Pretender.js |
|---|---|---|
| Price from | €12.50/mo | — |
| Free plan | Yes | — |
| Free trial | — | — |
| Open source | — | — |
| Web | Yes | Yes |
| Linux | Yes | — |
| API | Yes | — |
| Self-hosted | Yes | — |
| Plans published | 7 | 0 |
| Spec score · API Mocking Tools | 9.2 (#2) | 6.4 (#25) |
| Purpose | Mockfly creates hosted mock REST API endpoints so teams can build and test before a backend is ready. | Pretender is a mock server library for XMLHttpRequest and Fetch with an Express/Sinatra-style routing syntax. |
| Responses | Each endpoint can have multiple responses selected by conditional rules based on incoming requests. | Route handlers can return a response array containing an HTTP status, headers, and body, or return a Promise. |
| What it does | Mockfly provides hosted HTTPS mock API endpoints so teams can build and test before a real backend exists. | Pretender is a mock server library for XMLHttpRequest and Fetch with an Express- or Sinatra-style syntax for defining routes and handlers. |
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.
Pretender.js
Pretender.js has no write-up on Specifiction yet; its figures are above.