Hoppscotch
Open source API development ecosystem
About Hoppscotch
Hoppscotch is a free, open-source API development ecosystem trusted by millions of developers to build, test, document, and collaborate on APIs. It supports REST, GraphQL, WebSocket, MQTT, SSE, and Socket.IO protocols, and is available as a web app, desktop app, or CLI.
Pros & Cons
Pros
- Completely free and open-source with no feature limitations on the free tier
- Extremely lightweight and fast compared to heavier alternatives like Postman
- Supports a wide range of protocols including REST, GraphQL, WebSocket, MQTT, SSE, and Socket.IO
- Self-hosting option keeps sensitive API data within your own infrastructure
- Easy to get started — runs directly in the browser with no installation required
- Active open-source community with 67k+ GitHub stars
Cons
- Limited scripting functionality compared to Postman for complex test scenarios
- Pre and post-request scripts do not transfer when migrating from other tools
- No built-in scheduler for automated recurring test runs
- Collaboration features are less mature than established enterprise tools
- Does not yet support HTTP/2 or HTTP/3 protocols
Key Features
RESTful API Testing
Send HTTP requests, inspect responses, and write assertions to validate API behavior
GraphQL Support
Dedicated GraphQL client with schema exploration, auto-completion, and query building
Real-Time Protocol Support
Test WebSocket, MQTT, SSE, and Socket.IO connections directly from the interface
Environment Variables
Manage environment variables and use them across requests for different deployment stages
Team Collaboration
Create workspaces for teams, organize requests in collections, and share them with collaborators in real-time
Self-Hosting
Deploy Hoppscotch on your own servers for full data privacy, security, and compliance
CLI & Desktop App
Platform-agnostic availability via web browser, native desktop application, or command-line interface
Collections & Folders
Organize API requests into collections and folders for structured project management
Internationalization
Available in 30+ languages so developers worldwide can use it in their native language
Pricing
- Unlimited workspaces
- Unlimited collections
- Unlimited requests
- Unlimited runners
- Community support
- Everything in Free
- Admin Dashboard
- Dedicated Support
- Custom payment options
Best For
API Development & Debugging
Quickly test and debug REST and GraphQL APIs during development without leaving your browser
Team API Collaboration
Share API collections and workspaces with your development team for consistent testing practices
Self-Hosted API Testing
Deploy on your own infrastructure for organizations with strict data privacy and compliance requirements
Real-Time API Testing
Test WebSocket, MQTT, and SSE connections for real-time applications and IoT projects
Postman Alternative
A lightweight, open-source replacement for Postman that avoids vendor lock-in and heavy resource usage
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