Hailstorm
High-performance API testing platform built for developers
A developer-centric API testing platform with local storage, git-friendly collections, and concurrent testing capabilities. Think Postman with a focus on performance and privacy.
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Features
Multi-Protocol Support
Full support for REST (HTTP/1.1, HTTP/2) with authentication vault for OAuth2, Bearer Tokens, API Keys, and AWS Signature.
Dynamic Environments
Support for Global, Environment, and Local variables with seamless switching for flexible API testing across contexts.
Scripting & Automation
Pre-request scripts, test assertions, and collection runner with data-driven testing (CSV/JSON input).
Load Testing
Built-in engine to scale a single request into concurrent load tests using worker threads with real-time telemetry.
Local-First Storage
Your data stays on your machine. No cloud sync, no account required - just pure API testing.
Git-Friendly Format
Collections saved in a format that works seamlessly with version control for team collaboration.
Licenses
User License
- Lifetime license
- All future updates included
- Security fixes included
Patron License
- Everything in User License
- Vote on new features (1 vote included)
- Shape the future of Hailstorm
- Support ongoing development
Developer License
- Complete source code access
- Modify for your requirements
- Integrate into internal tools
- No resale allowed
Download
Download and try Hailstorm for a reasonable evaluation period. Distribution powered by Lemon Squeezy.
Purchase & DownloadAfter purchase, download links will be available for all platforms.