Google Shuts Down 'Project Mariner' Web Browsing AI

Google has quietly discontinued Project Mariner, an experimental agentic AI tool designed for complex web browsing tasks, effective May 4, 2026. The shutdown was announced without prior warning via the project's landing page, which now directs users to utilize Gemini Agent for similar functionalities. Launched in December 2024 and highlighted at Google I/O 2025, Project Mariner allowed users to automate deep research activities, such as flight booking and product comparison, though it required a premium Google AI Ultra subscription. While the standalone tool is no longer available, Google stated that its underlying technology has been integrated into other products, including the auto-browse feature in Chrome and AI Mode search tools. This move occurs just weeks before the upcoming Google I/O 2026 conference, suggesting a strategic consolidation of experimental features ahead of new announcements. Reports indicate that staff from the Project Mariner team have been reassigned to develop a new AI agent, potentially signaling Google's intent to compete more aggressively in the evolving landscape of autonomous AI assistants. The decision reflects a broader trend of tech giants refining their AI offerings by merging successful experimental features into mainstream products.