Comparison of API simulation tools
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The tools listed here support simulating APIs. The are also called API mocking tools, service virtualization tools and over the wire test doubles.
| FOSS | Free | Supported protocols and APIs | Has a UI | Scriptable/Programmable | Docker support | Cloud offering | Quick start | |
|---|---|---|---|---|---|---|---|---|
| Charles Proxy | No; Proprietary | No | HTTP(S) | Yes | No | No | No | |
| Hoverfly | Yes; Apache 2[1] | Yes | HTTP(S) | No | Yes | Yes | Yes [2] | Hoverfly introduction |
| Mountebank | Yes; MIT[3] | Yes | HTTP(S) TCP SMTP[4] |
No | Yes[5] | Yes[6] | No | Mountebank Getting Started |
| SoapUI MockServer | Yes; EUPL[7] | Yes | HTTP(S)[8] | Yes[8] | No[8] | No[8] | No[8] | MockServer quick start |
| Traffic Parrot | No; Proprietary[9] | Yes (Community Edition)[9] | HTTP(S) JMS IBM® MQ (in beta)[9] |
Yes[9] | Yes[9] | Yes[9] | No | Traffic Parrot Quick Start |
| Wiremock | Yes; Apache 2 | Yes | HTTP(S) | No | Yes | Yes | Yes [10] | Wiremock Getting Started |