1
Postman Free tier

API development platform for designing, testing, documenting, and monitoring APIs.

Free for 3 users · Free API developers wanting a complete API platform
Collections Mock Servers Monitoring Docs
2
Insomnia Free tier Open Source

Open-source API client for REST, GraphQL, and gRPC with environment variables and plugin support.

Free for individuals · Free Developers wanting a lightweight REST and GraphQL client
REST GraphQL gRPC Plugins
3
Hoppscotch Free Open Source

Open-source API development ecosystem with real-time WebSocket testing and team collaboration.

Free Developers wanting a fast, open-source API client
Open Source Real-Time WebSocket Team Collab
4
Bruno Free Open Source

Open-source API client that stores collections as files on your filesystem — Git-friendly and offline-first.

Free Developers wanting a Git-friendly API client
Git-Friendly Offline-First Scripting No Cloud

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Feature RapidAPI Postman
Starting price Free Free

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