What Sets Them Apart
The API tooling landscape is moving away from Postman's centralized cloud model toward Git-friendly alternatives that store API definitions alongside code. Hurl and Bruno both support this shift but serve different primary use cases. Hurl is a testing tool — it runs HTTP requests and validates responses. Bruno is an exploration tool — it provides a visual interface for building, testing, and documenting API calls. Understanding this distinction prevents choosing the wrong tool for your workflow.
Hurl and Bruno at a Glance
Hurl's plain text format is designed for readability and version control. A Hurl file reads almost like documentation: the HTTP method and URL, headers, request body, then assertions about the response. Multiple requests chain naturally, with variable capture between steps enabling complete API workflow testing. The format diffs cleanly in Git, making API test changes as reviewable as code changes in pull requests.
Bruno's filesystem-first architecture stores API collections as files in Bru markup format (similar to Markdown). Each request is a separate file in a folder structure that mirrors your API organization. This approach enables Git version control of API collections without cloud sync — a direct response to Postman's shift toward paid cloud collaboration. The desktop GUI provides a familiar visual experience for building and running requests.
CI/CD integration is Hurl's strongest dimension. Run hurl --test api-tests/ to execute all test files with JUnit XML output for test runners, HTML reports for human review, and non-zero exit codes for pipeline integration. The Rust-based binary is fast — hundreds of API tests complete in seconds. Bruno has CLI support (bru run) for CI/CD but it is designed as a secondary feature rather than the primary interface. For API test automation in deployment pipelines, Hurl is more naturally suited.
Interactive Exploration, Assertions, and Protocol Support
Interactive exploration favors Bruno's visual approach. Bruno's desktop app provides request builders with parameter editing, header management, body composition, response viewers with JSON/XML formatting, environment variable management, and collection organization. This visual experience makes API exploration efficient — you can see request and response side by side, try different parameters, and iterate quickly. Hurl is text-only — effective for defined tests but less convenient for exploratory API development.
Assertion capabilities show Hurl's testing depth. Hurl supports status code checks, header assertions, body validation via JSONPath, XPath, regex, and exact string matching, response time assertions, and certificate validation. Each assertion produces clear pass/fail output. Bruno provides basic assertions through its test scripts (JavaScript), offering flexibility but requiring more code. For teams that want declarative test assertions without writing JavaScript, Hurl's approach is cleaner.
Protocol support shows Bruno's breadth. Bruno supports REST, GraphQL, gRPC, and WebSocket protocols through its visual interface. Hurl focuses on HTTP/HTTPS requests (GET, POST, PUT, DELETE, PATCH, and others) with comprehensive support for cookies, authentication, multipart forms, and file uploads. For teams working with GraphQL or gRPC APIs, Bruno provides native protocol support that Hurl does not.
Performance and Environment Management
Performance characteristics favor Hurl for bulk testing. The Rust implementation processes requests with minimal overhead — no JavaScript runtime, no GUI framework, no process startup cost. For test suites with hundreds of requests, Hurl's raw speed is noticeable. Bruno's Electron-based desktop app is responsive for interactive use but adds overhead for automated batch execution. In CI/CD where test duration matters, Hurl's speed advantage is practical.
Environment and variable management differs in approach. Bruno supports environment files (like Postman environments) with variable substitution across requests. Hurl supports variables through --variable flags and captured values from previous responses. Both enable parameterized testing across environments (dev, staging, production), but Bruno's visual environment management is more user-friendly for teams managing multiple environments.
