Google Shuts Down Project Mariner AI Feature

Google has officially shut down Project Mariner, an experimental AI feature designed to automate web browsing tasks on behalf of users. The project's landing page now confirms that the service ended on May 4th, 2026. Project Mariner was part of Google's broader effort to create autonomous AI agents capable of filling forms, booking appointments, and navigating complex websites without human intervention. The shutdown comes as Google reassesses its experimental AI products, likely due to technical hurdles or strategic realignment. While the company has not provided a detailed explanation, sources suggest that ensuring reliability and safety for autonomous web agents proved more challenging than anticipated. Users who tested the feature reported mixed results, with the AI sometimes struggling on sites with unusual layouts or requiring authentication. This move does not necessarily signal an end to Google's ambitions in autonomous web agents. The company continues to develop similar capabilities within its Gemini ecosystem, but with a more cautious rollout. Project Mariner's closure highlights the difficulty of deploying AI that can safely and reliably act on behalf of users across the chaotic landscape of the open web. For now, Google appears to be prioritizing quality control over speed in bringing such features to market.