99tests is a real-device software testing service designed for teams that use AI coding tools to generate test cases but still need human-verified evidence before releasing their products. Teams submit their test cases, select the target phones or browsers, and have real testers execute the cases manually on the devices they own. The service delivers a report within three business days, with each test case assigned a pass or fail status alongside supporting evidence where applicable.

The platform focuses on helping engineering teams validate software behavior beyond what automated tests and emulators can reveal. By combining manual execution on physical devices, detailed reproduction notes, device-specific context, and verified findings, 99tests helps teams identify issues before shipping. It is designed for release managers, QA leads, and teams building with AI coding assistants who need reproducible test results that can be reviewed and shared as part of release decisions.