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bruno

Free

Opensource IDE For Exploring and Testing API's (lightweight alternative to Postman/Insomnia)

AI AgentsFreeFree tier
Type
Open Source

About bruno

Bruno is a free, open-source, Git-native API client that redefines how developers interact with APIs. Unlike traditional cloud-locked tools, Bruno stores API collections as plain text files (YAML) directly in your Git repository, enabling version control, diffs, reviews, and merges alongside your code. It is local-first: no cloud sync, no account, no login, and data never leaves your machine. Bruno supports HTTP, REST, GraphQL, and gRPC protocols, with built-in scripting, testing, authentication management, secret manager integration (Vault, Azure Key Vault, AWS), code generation, and a collection runner with data-driven and report generation capabilities. It also offers deep Git integration (clone, commit, push, branch, merge conflict resolution), OpenAPI import/sync, and works in your IDE, terminal, and with agents. For enterprises, Bruno provides SSO, SCIM, audit logs, license management, and is SOC 2 Type II certified. Designed as a lightweight, privacy-focused alternative to Postman and Insomnia.

Key Features

Git-native: API collections stored as plain text YAML files in your repo
Local-first: no cloud sync, no account, data never leaves your machine
Open-source and endlessly extensible
Supports HTTP, REST, GraphQL, and gRPC protocols
Scripting and testing capabilities
Authentication management and secret manager integration (Vault, Azure Key Vault, AWS)
Code generation for multiple languages
Collection runner with data-driven testing and report generation
Full Git integration: clone, diff, commit, push, branch, merge conflict resolution
OpenAPI import and collection-to-OAS generation

Pros & Cons

Pros
  • Fully open-source with no vendor lock-in
  • Local-first design ensures data privacy and security
  • Git-native collaboration: collections versioned alongside application code
  • Lightweight and fast compared to cloud-heavy alternatives
  • Supports a wide range of API types (REST, GraphQL, gRPC, HTTP)
  • SOC 2 Type II audited, suitable for enterprise compliance
  • Works offline and requires no internet connection
Cons
  • No native cloud sync; collaboration requires Git knowledge
  • Advanced enterprise features (SSO, SCIM, audit logs) require paid Pro or Ultimate plans
  • Less familiar for non-developers who prefer GUI-based cloud workspaces
  • No mobile app available (desktop-only)

Best For

API development and debuggingCollaborative API testing via Git workflowsAutomated API testing in CI/CD pipelinesEnterprise API management with security complianceMigration from Postman or Insomnia to a local-first toolSeeding data for specific test cases using collection runner

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