Thunder Client Alternatives & Competitors

The Collaboration Platform for API Development.

Key Postman features:

User-Friendly Interface Collaboration Comprehensive Testing Tools Extensive API Documentation

Open Source

Design, debug, test, and mock APIs locally, on Git, or cloud. Build better APIs collaboratively for the most popular protocols with a dev‑friendly UI, built-in automation, and an extensible plugin ecosystem.

Key Insomnia REST features:

User-Friendly Interface Support for Multiple Protocols Environment Management Custom Plugins and Themes

Open Source

warmup.rocks keeps your CDN cache warm in every edge location worldwide: Cloudflare, Fastly, Akamai, CloudFront and more. Warming from 42 countries, hit-ratio analytics.

Try for free paid Free Trial $15.0 / Monthly (1 project, 100 pages per run, Warm every 3 hours)

Open source API development ecosystem.

Key Hoppscotch features:

User-Friendly Interface Open Source Multi-Platform Support Real-Time Collaboration

Open Source freemium

A Powerful API Mocking and Testing Tool.

Key Requestly features:

Redirect URL Block Network Requests Modify Request & Response Header Modify Response

Open Source freemium

Paw is a REST client for Mac.

Key RapidAPI for Mac features:

User Interface Team Collaboration Advanced Request Capabilities Extensions and Plugins

SoapUI Pro is one of the most prominent API testing platforms around, allowing developers to quickly prototype the functions of their apps and get them to market with little hassle.

Key soapUI features:

Comprehensive Testing User-Friendly Interface Extensive Protocol Support Scripting Capability

Bruno is a Git-integrated, fully offline, and open-source API client.

Key Bruno features:

User-Friendly Interface Comprehensive Feature Set Regular Updates Strong Customer Support

Open Source

API Client and API monitoring.

freemium $49.0 / Monthly

All-in-One workspace for API Design, Documentation, Debug, Mock, Test.

Key Apidog features:

User-Friendly Interface Comprehensive API Management Collaboration Features Integration Capabilities

freemium $9.0 / Monthly

Slow, difficult and unreliable testing for anything that runs in a browser. Install Cypress in seconds and take the pain out of front-end testing.

Key Cypress.io features:

Easy Setup and Configuration Real-time Reloads Time Travel Debugging Automatic Waiting

Open Source

NativeRest is a native REST API client for Windows, macOS and Linux. NativeRest desktop application is not using Electron, runs fast, uses less memory and CPU.

Key NativeRest features:

High-performance and memory efficient Preconfigured proxy server Simple testing Manage multiple environments

freemium $199.0 / One-off

cURL is a computer software project providing a library and command-line tool for transferring data...

Key cURL features:

Versatility Cross-Platform Command-Line Usage Automation

Open Source

API Design, develop and test tool.