API Test Base Alternatives & Competitors

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

The Collaboration Platform for API Development.

Key Postman features:

User-Friendly Interface Collaboration Comprehensive Testing Tools Extensive API Documentation

Open Source

Flagsmith lets you manage feature flags and remote config across web, mobile and server side applications. Deliver true Continuous Integration. Get builds out faster. Control who has access to new features. We're Open Source.

Key Flagsmith features:

Feature Flags Remote Config A/B/X Testing & Optimization Organization Management

Try for free Open Source freemium

API test automation tool that has GUI, supports HTTP stubs (mock services), data driven testing...

Crosscheck Networks designed SOAPSonar from the ground-up as a comprehensive testing solution with...

Key SoapSonar features:

Comprehensive Testing Support User-Friendly Interface Automation Capabilities Security Testing

Log, monitor and measure your API usage to solve API problems fast.

Key Runscope features:

Ease of Use Comprehensive API Testing Automated Testing Detailed Reporting

Nightingale is a fast, resource-efficient, and full-fledged REST API client for Windows 10.

Bearer is an open source, fast and accurate static application security testing (SAST) tool that analyze your source code to discover, filter and prioritize security and privacy risks.

Key Bearer features:

Security Ease of Use Monitoring and Analytics Compliance Support

Open Source freemium

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

HTTP REST client tool for emacs.

Key restclient.el features:

Ease of Use Integration with Emacs Lightweight Scripting Capabilities

HTTP client plugin for Sublime Text with an expansive feature set, modern UX, elegant syntax and...

Open Source

HttpMaster is a professional software tool for testing and debugging HTTP applications, primarily aimed at REST API applications and web services.

Key HttpMaster features:

HttpMaster project to store complete definition of API calls in one single place Broad set of http properties Dynamic parameters to simulate variations of input data or create global API values Response data validation with logical expressions

freemium

API performance, accuracy, and uptime testing. Without code.

Key API Fortress features:

Comprehensive Testing User-Friendly Interface Automation Capabilities Collaboration Features

It's a screen ruler for Windows.

Key Ruler for Windows features:

Ease of Use Precision Customizable Lightweight

Open Source