Hoverfly vs Pretender.js
Hoverfly
hoverfly.ioPretender.js
github.comSide by side
| Figure | Hoverfly | Pretender.js |
|---|---|---|
| Price from | $10/mo | — |
| Free plan | — | — |
| Free trial | Yes | — |
| Open source | — | — |
| Web | Yes | Yes |
| Windows | Yes | — |
| macOS | Yes | — |
| Linux | Yes | — |
| API | Yes | — |
| Self-hosted | Yes | — |
| Plans published | 3 | 0 |
| Spec score · API Mocking Tools | 8.5 (#6) | 6.4 (#25) |
| License | The open-source Hoverfly framework is distributed under the Apache 2 license. | The package metadata identifies the license as MIT. |
| Purpose | Hoverfly Cloud is a hosted API simulation and mocking platform for testing without relying on live API dependencies. | Pretender is a mock server library for XMLHttpRequest and Fetch with an Express/Sinatra-style routing syntax. |
Plans
In their own words
Hoverfly
Hoverfly Cloud is a hosted API simulation and mocking platform for testing without live API dependencies. It handles HTTP/S services including REST, SOAP, XML, JSON, and GraphQL. Users can capture and replay traffic, generate simulations from OpenAPI specifications, and match requests by methods, headers, parameters, and bodies. Simulations can delay responses, inject faults or errors, and modify replies. A command-line interface supports scripted configuration and testing pipelines. Hoverfly and hoverctl binaries run on macOS, Linux, and Windows, while documentation covers Docker and Kubernetes installation. The underlying Hoverfly framework is open source under Apache 2, has no GUI, and is generally run locally or in a user’s infrastructure. Cloud use cases include performance testing, functional testing, and development.
Pretender.js
Pretender.js has no write-up on Specifiction yet; its figures are above.