Mockoon is the easiest and quickest way to run mock APIs locally. No remote deployment, no account required, open source.
Cost / License
- Free
- Open Source (MIT)
Platforms
- Mac
- Windows
- Linux
France
EU
+1
MockServer Alternatives
Apps similar to MockServer include Mockoon, which is free and open source. Other options are Reqable, Webhook.site, WireMock and mockd. You're spoiled for choice with API Clients like MockServer: we list more than 25 alternatives for the web, Mac, Windows, Linux and self-hosting.
Alternatives list
- 24 Mockoon alternatives
Reqable is a modern cross-platform project, designed for API development, testing, and debugging. Reqable fully supports HTTP1 and HTTP2 and partially supports HTTP3(QUIC).
Cost / License
- Freemium
- Proprietary
Application typeApplication types
Platforms
- Mac
- Windows
- Linux
- Android
- iPhone
- Android Tablet
- iPad
- Flathub
- Flatpak
+9
Webhook.site is a tool for building software that not only use webhooks but other types of communication, either by allowing developers to inspect the data that's being sent via a webhook, but also helps users create workflows that respond to and interact with webhooks from...
Cost / License
- Freemium
- Open Source
Application typeApplication types
Platforms
- Online
- Self-Hosted
- Software as a Service (SaaS)
Denmark- EU
WireMock is a simulator for HTTP-based APIs. Some might consider it a service virtualization tool or a mock server.
Cost / License
- Free
- Open Source (Apache-2.0)
Platforms
- Mac
- Windows
- Linux
Multi-protocol mock server for HTTP, gRPC, GraphQL, WebSocket, MQTT, SSE, and SOAP. One Go binary, zero dependencies. Supports stateful CRUD, digital twins (passes real SDK tests), chaos engineering, OpenAPI/Postman/HAR/cURL import, and a built-in MCP server for AI agents.
Cost / License
- Freemium
- Open Source (Apache-2.0)
Platforms
- Online
- Software as a Service (SaaS)
- Linux
- Windows
- Mac
United States
Build a mock Rest API endpoint in seconds. Helps you in UI development, Webhooks, simulating delays, simulating exceptions and server errors, performance test, etc.
Cost / License
- Freemium
- Proprietary
Platforms
- Online
- Software as a Service (SaaS)
Runscope helps you monitor, log and measure API usage to solve API problems fast. Automatically monitor APIs without any coding. Runscope provides complete logging for all of your API traffic. Track down troublesome API calls with powerful search.
Cost / License
- Freemium
- Proprietary
Platforms
- Mac
- Windows
- Linux
- Online
- United States
SOAP/REST Mock Service is a simple configurable framework to mock out SOAP or RESTful (or "REST-like") webservices. It's main goal is to support automated integration testing of applications that integrate with 3rd party webservices.
Cost / License
- Free
- Open Source
Platforms
- Mac
- Windows
- Linux
- Online
S
Bearer is a developer tool that helps engineering teams monitor API requests, track performance, detect anomalies, and fix issues for their critical API usage. The solution monitors all outgoing API requests without proxying traffic.
Cost / License
- Freemium
- Proprietary
Platforms
- Software as a Service (SaaS)
- France
- EU
+3
Cost / License
- Freemium
- Proprietary
Platforms
- Online
+1
MockBolt lets you paste any JSON and instantly get a live mock HTTP endpoint — no signup, no install, no CLI.
Cost / License
- Freemium
- Proprietary
Platforms
- Online
- Software as a Service (SaaS)
Online API Mocking Tool: API Mock, fake API, stub API, simulate API, dummy API. Capture and debug requests instantly. Forward requests to localhost for webhooks testing and debugging. More than 100 random or faker shortcodes for response templating.
Cost / License
- Freemium
- Proprietary
Platforms
- Online
- Software as a Service (SaaS)
