WireMock alternative: Mockfly vs WireMock and WireMock Cloud
WireMock is the reference tool for HTTP stubbing in the Java world, and its hosted version, WireMock Cloud, brings the same engine to a SaaS. Mockfly comes from the other direction: a hosted mock API a frontend team configures in a browser. This page compares power, effort and price.
What WireMock does well
WireMock is an open-source library and standalone server with very deep request matching: URL patterns, headers, cookies, JSON and XPath body matching, response templating with Handlebars, stateful scenarios, fault injection and record-and-playback from a real API. Embedded in a JUnit test or run as a JAR or Docker container, it is the tool many backend teams already know.
The effort is in the setup and the format: stubs live in JSON or Java code, someone has to host the server for anything shared, and a tester or a designer cannot change a response without a developer. WireMock Cloud removes the hosting but keeps a free tier small enough (1,000 calls a month) that real usage means the Enterprise plan.
What changes with Mockfly
- No code, no JVM, no hosting. Endpoints, responses and rules are configured in a web UI and served from
api.mockfly.devimmediately. - Anyone on the team can edit. QA flips a response to 500, product adds a scenario, the frontend adjusts a body. Team plan: 5 seats, one invoice.
- Unlimited requests on Pro and Team. No monthly call quota.
- Realistic data. Faker.js templates and AI-generated JSON instead of hand-written stubs.
- Fast starts. Import OpenAPI, Postman or HAR, or capture real requests with the Chrome extension. Automate with the public REST API or the MCP server.
Where WireMock is the better choice
- Stubs must live inside a Java or Kotlin test suite and run in-process.
- You need stateful scenarios, fault injection at the TCP level or record-and-playback of production traffic.
- The mock server has to run on your own infrastructure.
Pricing
| Plan | Mockfly | WireMock |
|---|---|---|
| Free | 500 requests/day, 1 project, 4 endpoints, 2 responses each | Open-source server: free, self-hosted. WireMock Cloud Free: 1,000 calls/month, 3 mock APIs, 1 user |
| Individual | Pro: 15€/month or 150€/year, unlimited requests | No individual cloud plan at the time of writing |
| Team | 49€/month for 5 seats, 9€ per extra seat | WireMock Cloud Enterprise: custom quote |
Third-party prices as listed on the vendor's website in September 2026. Check their pricing page for the current figures.
Features comparison
| Feature | Mockfly | WireMock |
|---|---|---|
| Hosted URL without deploying | ✅ | WireMock Cloud only |
| Configure in a web UI | ✅ | WireMock Cloud only |
| Request matching | ✅ Query, headers, URL params, body, JSONPath, XPath | ✅ Very deep, including cookies and multipart |
| Stateful scenarios | ❌ | ✅ |
| Response templating from the request | ✅ Placeholders and filters | ✅ Handlebars |
| Faker.js and AI data | ✅ | Random helpers |
| Record and playback | Chrome extension and HAR import | ✅ Proxy recording |
| Proxy to the real API | ✅ Per endpoint | ✅ |
| Team seats, logs and auto documentation | ✅ | Cloud plan |
| WebSocket mocking | ✅ | ❌ |
| Runs in-process in a JVM test | ❌ | ✅ |
See it with a real endpoint: create a free project at app.mockfly.dev and add a rule in under a minute.
Frequently asked questions
Is WireMock free?
The WireMock library and standalone server are open source and free. WireMock Cloud, the hosted version, has a free tier limited at the time of writing to 1,000 calls a month, 3 mock APIs and one user, and an Enterprise plan with custom pricing.
Do I need Java to use Mockfly?
No. Mockfly is a web application: define endpoints in the browser and call them from any language or platform. Nothing to install, no JVM, no YAML or JSON stub files to maintain.
Can Mockfly do stateful scenarios like WireMock?
Not in the same way. WireMock's scenarios change the response based on previous requests. Mockfly picks the response with rules on the current request (query, headers, body, JSONPath) and can substitute request values into the body, which covers most frontend needs, but it does not keep state between calls.
Which one should a frontend team pick?
If the mocks are written and consumed by Java developers inside a test suite, WireMock is the natural fit. If frontend, mobile and QA people need a shared URL they can edit without code, Mockfly is the shorter path.