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Alternative

Postman alternative for offline, account-free API testing

Postman is a cloud API platform built around team workspaces. MyDevTools is a free, open-source desktop API client that covers REST, GraphQL, WebSocket and gRPC, with a local mock server, collection runner, scripting and encrypted secrets — no account, no sync, and 80+ other developer tools in the same app.

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Choose Postman when

Postman is the better fit when API work is a team process that lives in the cloud.

  • You need shared cloud workspaces, comments and role-based collaboration.
  • You run collections from CI with a command-line runner, or rely on monitors and hosted documentation.
  • You need API governance features, or Windows and Linux builds — MyDevTools ships macOS builds today.

Choose MyDevTools when

MyDevTools covers the day-to-day API client feature set without a login, a plan, or a server in between.

  • REST, GraphQL with schema introspection, WebSocket, and native gRPC via server reflection or a pasted .proto, including unary and streaming calls.
  • Collections with saved examples, environments, response chaining and pre-request/test scripts using the familiar pm.* API — plus a runner with CSV/JSON data files and JUnit export, and a local mock server built from your saved examples.
  • Secrets resolved from the encrypted local vault at send time and never written into collections; import Postman v2.1, OpenAPI, HAR and cURL, export Postman, OpenAPI 3.0, HAR and Insomnia.

Verdict

Postman remains the stronger choice for cloud team workflows and CI. MyDevTools is the stronger choice for a private, offline client where every feature is free.

  • Best cloud team platform and CI runner: Postman.
  • Best free, offline, account-free API client: MyDevTools.
  • Best API client plus 80+ developer tools in one app: MyDevTools.

Common comparison questions

Is MyDevTools a full Postman replacement?

For individual API work, yes: REST, GraphQL, WebSocket, gRPC, collections, environments, scripting, a runner and a mock server are all included and free. It does not replace the Postman cloud workspaces, CLI runner, monitors or governance features.

Can I import my Postman collections?

Yes. Import Postman v2.1 collections, OpenAPI 3 / Swagger 2, HAR and cURL. You can export back to Postman, OpenAPI 3.0, HAR 1.2 or Insomnia v4 at any time.