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10 Best Free Alternatives to Postman (2026)

10 Best Free Alternatives to Postman (2026)

DodaTech Updated Jun 20, 2026 4 min read

Postman has been the dominant API testing tool for years, but its recent focus on monetization — limiting collection runs, removing offline sync, and pushing cloud features — has frustrated developers. Free and open-source alternatives like Insomnia, Bruno, and Hoppscotch offer offline-first workflows, local data storage, and modern interfaces without subscription fees.

Comparison Table

FeatureInsomniaBrunoHoppscotchHTTPieThunder Client
GUI/CLI✓ Both✓ Both✓ Web✓ CLI (GUI via UI)✓ VS Code extension
Collections✓ Yes✓ Yes✓ Yes✗ No✓ Yes
Environment vars✓ Yes✓ Yes✓ Yes✓ Yes✓ Yes
Code generation✓ Yes✓ Yes✓ Yes✗ No✓ Yes
Offline-first✓ Yes✓ Yes✗ Web-based✓ Yes✓ Yes
PricingFree (Freemium)FreeFreeFree (Desktop paid)Free

Insomnia

Insomnia is the most polished Postman alternative, offering a clean interface with support for REST, GraphQL, and gRPC APIs. It stores collections locally (no account required) and supports environment variables, plugins, and code generation in 20+ languages. The free version includes unlimited local collections, while the paid plan adds cloud sync and collaboration.

Pros

  • ✓ Clean, modern interface
  • ✓ Local-first — no account needed for core features
  • ✓ Supports REST, GraphQL, gRPC, and WebSockets
  • ✓ Rich plugin ecosystem

Cons

  • ✗ Cloud sync and team collaboration require paid plan
  • ✗ GraphQL support is less featureful than dedicated tools
  • ✗ Slower startup than Thunder Client (VS Code extension)

Bruno

Bruno takes a unique approach: collections are stored as plain text files (Bru markup language) on your filesystem, making them Git-friendly and fully version-controlled. It’s completely offline-first with no cloud dependency and no telemetry. Bruno includes environment variables, pre-request scripts, tests, and a powerful query response viewer.

Pros

  • ✓ Collections are Git-friendly plain text files
  • ✓ 100% offline — no cloud, no telemetry, no account
  • ✓ Open-source with MIT license
  • ✓ Pre-request and post-response scripts

Cons

  • ✗ No cloud sync (by design — files are synced via Git)
  • ✗ Smaller community and fewer integrations
  • ✗ No GraphQL or gRPC support yet
  • ✗ UI is less polished than Insomnia

Hoppscotch

Hoppscotch (formerly Postwoman) is a web-based API testing platform that runs in the browser. It supports REST, GraphQL, WebSockets, SSE, and MQTT — more protocols than most alternatives. Hoppscotch is built with Vue.js and works instantly without installation, making it ideal for quick testing on any device.

Pros

  • ✓ No installation — works in any browser
  • ✓ Supports REST, GraphQL, WebSocket, SSE, MQTT
  • ✓ Real-time collaboration features
  • ✓ Open-source and ad-free

Cons

  • ✗ Web-based — requires internet for full functionality
  • ✗ No offline mode (PWA support is limited)
  • ✗ No environment variable chaining in free version
  • ✗ Performance lags with large responses

HTTPie

HTTPie is a command-line API testing tool that uses a simple, intuitive syntax — http GET https://api.example.com/users — with colorized output, JSON highlighting, and built-in authentication support. The desktop version (HTTPie Desktop) adds a GUI for those who prefer visual interfaces. HTTPie is ideal for developers who spend most of their time in the terminal.

Pros

  • ✓ Simple, intuitive CLI syntax
  • ✓ Colorized, formatted JSON output
  • ✓ Built-in support for auth, SSL, and proxy
  • ✓ API sessions for persistent headers/auth

Cons

  • ✗ No collection management in CLI
  • ✗ Desktop version requires paid license
  • ✗ No code generation or environment variable UI
  • ✗ Limited support for GraphQL

Thunder Client

Thunder Client is a lightweight API testing extension for VS Code that runs entirely within the editor. It stores collections locally and supports environment variables, test scripts, and code generation. Thunder Client is designed for developers who want to test APIs without leaving their editor — no separate application needed.

Pros

  • ✓ Works inside VS Code — no context switching
  • ✓ Extremely lightweight and fast
  • ✓ Local storage with no accounts
  • ✓ Collection runner and test scripts

Cons

  • ✗ VS Code only — not available standalone
  • ✗ Fewer features than Insomnia or Postman
  • ✗ No GraphQL or gRPC support
  • ✗ Limited collaboration features

Bottom Line

Insomnia for the most polished all-around Postman replacement. Bruno for teams that want Git-versioned, offline-first collections. Hoppscotch for quick browser-based API testing with protocol variety. HTTPie for terminal-focused developers who want a beautiful CLI. Thunder Client for VS Code users who never want to leave their editor.

FAQ

Can I import my Postman collections into these alternatives?
Insomnia, Bruno, Hoppscotch, and Thunder Client all support importing Postman collections (JSON export). HTTPie does not support Postman collection imports. Bruno converts Postman collections to its Bru markup format.
Which Postman alternative is completely offline?
Bruno and Thunder Client are fully offline-first with no cloud dependency. Insomnia works offline for local collections. Hoppscotch requires internet as a web-based tool. HTTPie’s CLI is offline but the desktop version needs internet.
Which alternative has the best GraphQL support?
Insomnia has the most complete GraphQL support among these alternatives, with schema introspection, variables, and query autocomplete. Hoppscotch also supports GraphQL. Bruno and Thunder Client do not support GraphQL natively.

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