Open-source API testing tool with AI-powered debugging, mock data generation, and team collaboration for faster development.
Sparrow is a lightweight, open-source API testing platform built as a modern alternative to Postman. It helps developers build, test, document, and debug APIs with AI-powered assistance, including auto-generated cURL commands, mock data, and documentation. Built with Tauri and Svelte, it launches faster and uses fewer resources than traditional API tools. Available as a web app, desktop app (macOS, Windows, Linux), or self-hosted solution, Sparrow supports team collaboration through hubs, workspaces, and role-based access controls.
Sparrow offers a free Community plan for solo developers and small teams. It also has Standard, Professional, and Enterprise tiers for teams needing more collaboration features, workspaces, and support. Visit sparrowapp.dev/pricing for current plan details.
Yes. Sparrow is open source under the GNU Affero General Public License. The full source code is available on GitHub at github.com/sparrowapp-dev/sparrow-app.
Yes. Sparrow supports self-hosting through Docker. You can install all services (MongoDB, API Server, Auth Server, Proxy Server) as containers and run the web app on your own infrastructure.
Sparrow is lighter, faster, and more privacy-focused than Postman. It launches 20% faster, uses less than half the system resources, and offers self-hosting for full data control. However, Postman has a larger feature set, more mature enterprise capabilities, and a bigger community ecosystem.
Sparrow is available as a web app (no installation needed), a native desktop app for macOS, Windows, and Linux, and a self-hosted option for on-premise deployment.
Sparrow uses AI to generate mock data, create cURL commands from API specs, auto-generate documentation, debug failing test cases with suggested fixes, and assist with variable generation across collections.
Yes. Sparrow provides hubs and workspaces for organizing teams, with public and private visibility settings and role-based access control (Admin, Editor, Viewer roles).
Sparrow primarily supports REST API testing with custom authentication, headers, parameters, and test scripts. It includes both no-code assertion tools and a JavaScript editor for more advanced testing scenarios.
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