alternatives to
A tool for mocking HTTP services
MockServer, mountebank, and Smocker. 3 alternatives to WireMock, in Java, JavaScript, TypeScript. Compare fit, licence, stars and the latest signed release.
| Tool | Fit | Stars | Licence | Terms | Self-hosted | Language | Latest | Last push |
|---|---|---|---|---|---|---|---|---|
| MockServer | Full replacement | 5k | Apache-2.0 | Open source | No | Java | mockserver-9.0.0 | 2026-10-19 |
| mountebank | Full replacement | 2.1k | MIT | Open source | No | JavaScript | v2.9.4 | 2026-10-16 |
| Smocker | Full replacement | 1.3k | MIT | Open source | No | TypeScript | 1.0.0 | 2026-10-17 |
3 alternatives
MockServer is an HTTP(S) mock server and proxy for testing that lets you mock APIs, inspect and modify live traffic, and inject failures. It supports HTTP/1.1, HTTP/2, gRPC, WebSockets, TCP and more on a single port, with additional support for HTTP/3, message brokers, and AI/LLM APIs.
HTTP mocking, request matching and fault injection from code or configuration.
Over the wire test doubles
Programmable test doubles for HTTP, TCP and SMTP, driven by a REST API.
Smocker is a simple and efficient HTTP mock server and proxy
HTTP mock server and proxy with a web UI and a REST API for defining mocks.