API Spector vs Bruno
Short version: Bruno and API Spector share a philosophy: local-first, offline, Git-friendly, no mandatory account. Bruno is a focused, lightweight API client. API Spector covers the same ground and adds mock servers, contract testing, and export to real test code.
What Bruno is
Bruno is an open-source, offline-first API client that stores each request as a
plain-text file (its .bru markup) in a folder you keep in Git. It rejected the
cloud-account model on principle and is popular with developers who want a fast,
simple client whose collections live in the repo. Its scope is intentionally
narrow: it is a very good request client.
Side by side
| API Spector | Bruno | |
|---|---|---|
| Local-first / offline | Yes | Yes |
| Account required | No | No |
| Storage | Files (Git-friendly) | Files, .bru markup (Git-friendly) |
| Secret managers | Vault, AWS, Azure, 1Password (+ AES-256-GCM local) | Env files, .env, secret vars |
| GraphQL query builder | Yes, introspection-driven | Yes |
| SOAP + WSDL loader | Yes, load a WSDL and generate the envelope | No |
| Export to test code | Robot Framework, Playwright, Karate, REST Assured, supertest | Not a focus |
| Mock servers | Yes (local and cloud) | No |
| Contract testing | Built in, Pact-compatible | No |
| OpenAPI test coverage | Yes, with a CI gate | No |
| Protocols | HTTP/REST, GraphQL, WebSocket, SOAP, gRPC (unary + server streaming) | HTTP/REST, GraphQL, gRPC |
| Scope | Client + mocks + contracts + code export | Focused request client |
Where API Spector fits
Bruno and API Spector agree on the fundamentals, so the choice is about scope.
- Author faster. An introspection-driven GraphQL query builder, a SOAP WSDL loader that fills in the envelope, and Vault / AWS / Azure / 1Password secret references, all built in - no plugins.
- More of the workflow in one place. If you also need mock servers, contract testing, or to generate runnable tests, API Spector covers those without adding another tool.
- Export to standard frameworks. Turn a collection into Robot Framework, Playwright, Karate, REST Assured, or supertest.
- Optional cloud when you want it. Hosted mocks, monitors, and a contract broker are available but never required.
Choose Bruno if
- You want the leanest possible local client and nothing more.
- You specifically prefer its
.brutext format, or you already use gRPC in it.
Choose API Spector if
- You want the same local-first, Git-friendly approach but also need mocking, contract testing, or test-code generation.
- You want a single tool for the request-to-contract-to-CI workflow.