Sauce Labs

Sauce Labs is an absolutely colossal, heavily entrenched, and deeply historic enterprise titan that operates as the absolute, heavy-weight direct rival to BrowserStack. Sauce Labs basically invented the concept of the 'Testing Cloud' and are famously the original corporate sponsors and core contributors to both Selenium and Appium. The absolute core superpower of Sauce Labs is its "Enterprise Security and Deep Appium Synergy." Because their engineers literally wrote much of the open-source Appium code, Sauce Labs runs Appium tests with terrifying efficiency and stability. Furthermore, they focus heavily on massive Fortune 500 banks who demand military-grade, SOC2 compliant testing environments. Because it offers this unshakeable open-source pedigree, massive real device clouds, and unparalleled VDC (Virtual Device Cloud) emulation capabilities, it is heavily favored by massive global finance, enterprise retail, and hardcore DevOps teams.