Alternatives to Calibre

19 alternatives to Calibre in Developer Tools. Ones the founder approved come first; the rest are listings in the same category.

• BrowserCat

  Headless Browser API with multi-backend routing and zero vendor lock-in

  • Same category
  • Growing
  • United States

  Compare Calibre with BrowserCat

• testRigor

  Generative AI-based test automation tool using plain English

  • Same category
  • Established
  • United States

  Compare Calibre with testRigor

• Treo

  Site speed monitoring with zero configuration

  • Same category
  • Slovenia

  Compare Calibre with Treo

• GTmetrix

  Test, Monitor, and Optimize Web Performance

  • Same category
  • Established

  Compare Calibre with GTmetrix

• SpeedCurve

  Website Performance Monitoring

  • Same category
  • Established

  Compare Calibre with SpeedCurve

• DebugBear

  Web performance monitoring platform that tracks site speed, Core Web Vitals, and Lighthouse scores using synthetic monitoring and real user monitoring.

  • Same category
  • Established
  • United Kingdom

  Compare Calibre with DebugBear

• Applitools

  AI-Augmented Testing

  • Same category
  • Established
  • United States

  Compare Calibre with Applitools

• LoadView

  Website Load Testing & Performance Tools

  • Same category
  • Established
  • United States

  Compare Calibre with LoadView

• Chromatic

  Frontend UI Testing & Review Platform for Teams

  • Same category
  • Established
  • United States

  Compare Calibre with Chromatic

• QA Wolf

  AI Testing Platform for Fast & Fearless Software Releases

  • Same category
  • Established

  Compare Calibre with QA Wolf

• Cypress

  Testing Frameworks for Javascript | Write, Run, Debug

  • Same category
  • Established
  • United States

  Compare Calibre with Cypress

• Sauce Labs

  AI-Unified Release Assurance Platform

  • Same category
  • Established
  • United States

  Compare Calibre with Sauce Labs

• BrowserStack

  Most Reliable App & Cross Browser Testing Platform

  • Same category
  • Established

  Compare Calibre with BrowserStack

• Rainforest QA

  AI Test Automation for Growing SaaS Companies

  • Same category
  • Established

  Compare Calibre with Rainforest QA

• Mabl

  Agentic Testing for the Next Generation of Software

  • Same category
  • Established

  Compare Calibre with Mabl

• Ghost Inspector

  No-code automated browser testing platform for recording, running, and monitoring end-to-end tests without coding.

  • Same category
  • Established

  Compare Calibre with Ghost Inspector

• TestMu AI

  Agentic AI Testing Cloud

  • Same category
  • Established
  • United States

  Compare Calibre with TestMu AI

• Testim

  AI-driven testing for Salesforce, web, and mobile

  • Same category
  • Established
  • United States

  Compare Calibre with Testim

• Testbirds

  QA and UX software crowdtesting from Testbirds. Use people-power to optimize your digital products.

  • Same category
  • Netherlands

  Compare Calibre with Testbirds