Bowire vs. Mockoon
Mockoon builds HTTP and WebSocket mocks by hand in a GUI. Bowire records real traffic and replays it as a mock over gRPC, SSE, WebSocket, MQTT and more — or synthesises one from a schema.
When Mockoon is the better fit
Pick Mockoon when you need a quick, free, fully offline mock of an HTTP/REST or WebSocket API, built in a GUI with no account: templating, rules, CRUD data buckets and simulated latency. Its JSON environment files live in git and the same file runs headless in CI through the CLI, the Docker image or the GitHub Action.
When Bowire is the better fit
Pick Bowire when the mock has to speak more than HTTP and WebSocket — gRPC (including streaming), SSE, SignalR, MQTT, GraphQL subscriptions — or when you want the mock to come out of real traffic: record a session against the running service, replay it as a mock with chaos and stateful modes, and use the same workbench to call, test and scan the real thing.
Where they differ
Only the rows where Mockoon and Bowire differ, from the full comparison. Rows we could not verify for Mockoon are left out rather than guessed. Facts as of 2026-08; correct one.
| Feature | Mockoon | Bowire |
|---|---|---|
| Multi-protocol supportMockoon: REST / HTTP and WebSocket mocks (HTTP routes, CRUD routes, WebSockets) | 2 | 20+ |
| Socket.IOMockoon: Documented as not implementing the Socket.IO protocol | ✗ | ✓ |
| Auto-discoveryMockoon: Mocks are built by hand or imported from an OpenAPI document | OpenAPI | ✓ |
| Embedded in ASP.NET appMockoon: Node / TypeScript tool | ✗ | ✓ |
| Native .NET | ✗ | ✓ |
| HAR exportMockoon: Log export as HAR is on the public roadmap (in progress) | ✗ | ✓ |
| Native export format | Environment JSON | .bwr |
| Mock engine depthMockoon: Handlebars / Faker templating, rules, CRUD data buckets, latency, callbacks; no request-verification API | partial | ✓ |
| Multiple duplex channelsMockoon: Several WebSocket endpoints, including broadcast; WebSocket only | partial | ✓ |
| Traffic interception / reverse proxyMockoon: Proxy mode forwards undefined routes and logs trafficBowire: In-process app.UseBowireInterceptor() middleware plus a YARP-based standalone reverse proxy; Intercept rail with Captured | Live overrides | Mock servers | partial | ✓ |
| AI assistant (local-first, BYOK)Mockoon: Generates endpoints and templates; paid Cloud plans, credit-based | partial | ✓ |
| Platform ops as MCP toolsMockoon: Since v9.8: mockoon-cli mcp with four tools (list, start, stop, list running) | partial | ✓ 15 tools |
| License | MIT | Apache 2.0 |
● supported · ◐ partial or paid tier · ○ not supported
Moving over from Mockoon
Mockoon exports an environment as OpenAPI v3 JSON, and Bowire's mock server serves an OpenAPI document directly:
bowire mock --schema mockoon-export.json --port 7070Every operation becomes a mock step whose body is generated from the declared response schema. Mockoon's templating, rules and data buckets don't carry over; add --chaos for latency and failures, or --stateful to walk a scenario. See schema-only mock.
The other way in is a recording: capture a session against the real service in Bowire, and bowire mock --recording session.bwr replays it, streaming protocols included. See mock server.