Testing APIs

Popular first highlights editorial picks, then ranks providers by monthly downloads of their official SDKs on npm and PyPI (measured 2026-10-18). Others follow A–Z.

Mailtrap

343.3K SDK downloads/moView API profile →

Airport

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API Fortress

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Appium

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Applitools

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Autify

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BlazeMeter

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BrowserStack

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Calibre

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Checkly

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Coveralls

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Cypress.io

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DebugBear

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Frontend Robot

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Global App Testing

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HELO

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HTTP Toolkit

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Katalon

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Kobiton

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Lighthouse

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Lighthouse Metrics

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mabl

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Mockaroo

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Pact

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Partner IT

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Percy

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Playwright

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PreFlight

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Rainforest QA

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Reflect

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remotedebug

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Selenium

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SmartBear

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SpotQA

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Testersuite

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Testim.io

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Testlio

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TestLodge

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TestRail

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WebdriverIO

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Counts reflect unique named profiles assigned to this category. Documentation and integration details vary by provider.