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A truly open-source API platform — free, powerful, and developer-first
A modern API development and testing platform supporting HTTP, WebSocket, and multiple protocols. Built for modern teams with offline support, collaboration, mock servers — fully open source and free.
Offline Ready
Work offline with full functionality (collaboration available when online).
Team Collaboration
Built-in real-time collaboration
Local Deployment
Self-host anywhere with full Docker support
Data Freedom
Export your data at any time
Free forever
All core features are free — forever.
Protocol Support
Supports HTTP, WebSocket, and extensible protocols.
Product Showcase
AI Agents
An AI assistant that generates API requests, manages variables, and runs workflows. Compatible with multiple AI models to streamline API workflows.
SSE Streaming Output
Built-in Server-Sent Events (SSE) support for real-time streaming and visualization. Debug faster with instant response capture.
Why Choose Apiflow?
Apiflow delivers powerful features—completely free.
Features others charge for — included for free in Apiflow.
Feature Comparison
A transparent comparison focused on real developer needs.
| Features | Apiflow | Postman | Apifox |
|---|---|---|---|
| Core Advantages | |||
| Open Source | |||
| Free | Limited | Limited (free public edition) | |
| Local Deployment Support | Requires payment | ||
| HTTP Request Support | |||
| Basic HTTP Methods (GET, POST, PUT, DELETE, PATCH, HEAD, OPTIONS) | |||
| HTTP/1.1 | |||
| HTTP/2 | |||
| Query & Path Parameters | |||
| Body Parameters (JSON, FormData, URL-encoded, Binary) | |||
| Auto Content-Type Header | |||
| Cookie Management | |||
| Pre/Post Request Scripts | |||
| Debug Local Services / CORS | |||
| Other Protocol Support | |||
| WebSocket | |||
| Socket.IO | |||
| gRPC | |||
| MQTT | |||
| History | |||
| Request History | |||
| Individual Node History | Limited (requires payment) | — | |
| Recycle Bin | |||
| Team Collaboration | |||
| Workspace | |||
| Roles & Permissions (RBAC) | |||
| Comments/Discussion | |||
| Audit Features | Limited (requires payment) | Limited (requires payment) | |
Core Advantages
Open Source
Apiflow
Postman
Apifox
Free
Apiflow
Postman
Limited
Apifox
Limited (free public edition)
Local Deployment Support
Apiflow
Postman
Apifox
Requires payment
HTTP Request Support
Basic HTTP Methods (GET, POST, PUT, DELETE, PATCH, HEAD, OPTIONS)
Apiflow
Postman
Apifox
HTTP/1.1
Apiflow
Postman
Apifox
HTTP/2
Apiflow
Postman
Apifox
Query & Path Parameters
Apiflow
Postman
Apifox
Body Parameters (JSON, FormData, URL-encoded, Binary)
Apiflow
Postman
Apifox
Auto Content-Type Header
Apiflow
Postman
Apifox
Cookie Management
Apiflow
Postman
Apifox
Pre/Post Request Scripts
Apiflow
Postman
Apifox
Debug Local Services / CORS
Apiflow
Postman
Apifox
Other Protocol Support
WebSocket
Apiflow
Postman
Apifox
Socket.IO
Apiflow
Postman
Apifox
gRPC
Apiflow
Postman
Apifox
MQTT
Apiflow
Postman
Apifox
History
Request History
Apiflow
Postman
Apifox
Individual Node History
Apiflow
Postman
Limited (requires payment)
Apifox
—
Recycle Bin
Apiflow
Postman
Apifox
Team Collaboration
Workspace
Apiflow
Postman
Apifox
Roles & Permissions (RBAC)
Apiflow
Postman
Apifox
Comments/Discussion
Apiflow
Postman
Apifox
Audit Features
Apiflow
Postman
Limited (requires payment)
Apifox
Limited (requires payment)
Note: Some features may vary slightly depending on the version