Updated October 24, 2026.

The image shows Google’s official Project Mariner shutdown notice, captured October 24, 2026. It is a status-page screenshot, not a working Mariner interface or a test performed for this review. Source: Google Labs.

Service status: Google’s official Mariner notice states that the service shut down on May 4, 2026 and that its technology moved into other Google products. The notice was checked on October 24, 2026.

Name Project Mariner
Overview Project Mariner was Google DeepMind’s experimental browser agent. Introduced in December 2024 with Gemini 2.0 and a Chrome-extension prototype, it explored navigating websites, filling forms and carrying out multi-step tasks under user supervision. The May 2025 update added multitasking. This profile describes that historical project, not a currently available Mariner service.
Historical Features
  • Multimodal Understanding: Interpreted web elements including text, images, code and forms to help plan browser actions.
  • Teach and Repeat: Google’s May 2025 demonstration described showing a task once to help the system plan similar tasks later; successful repetition was not guaranteed.
  • Simultaneous Task Management: Google’s May 2025 update advertised handling up to 10 tasks concurrently. This was a historical capability, not a current Mariner allowance.
  • Real-Time Interaction: Observed browser content, planned actions around a user’s goal and supported user intervention. Google cautioned that the early prototype could be slow and inaccurate.
Historical / Illustrative Use Cases
  • Job Hunting: Using resume information to find personalized job listings on platforms like Climatebase.
  • Online Shopping: Navigating to online stores to purchase items or find services, such as hiring a Tasker for furniture assembly.
  • Recipe Management: Identifying missing ingredients from a recipe stored in Google Drive and ordering them via services like Instacart.
Intended Audience (Historical)
  • Researchers & AI Enthusiasts: Exploring new frontiers in AI browser automation and web interaction.
  • Developers & Tech Innovators: Integrating AI into online workflows.
  • E-commerce & Data Analysts: Automating online product tracking and business research.
Pricing
  • Historical Google AI Ultra Access: Google’s May 20, 2025 launch announcement included Mariner in its U.S. $249.99/month Ultra subscription. This is a historical bundle price, not a current offer to access Mariner.
  • Early Testing: The initial prototype was limited to selected trusted testers. It is not a currently available open free tier.
Tags AI Agent, Browser Automation, Multimodal AI, Task Automation, Chrome Extension, Gemini 2.0
App Available?
  • Chrome Extension: The December 2024 prototype used an experimental extension for trusted testers; it should not be treated as a current installation route.
  • Later Google Tools: Google introduced Gemini Agent in November 2025 using insights from Mariner, and separately documents computer-use capabilities in the Gemini API. These are distinct product routes with their own access terms, not a continuing Mariner subscription.

Using this historical profile

The task examples above illustrate the earlier listing’s workflow categories; they are not current Mariner integrations or evidence that a task was tested for this review. For similar work today, check the selected Google product’s current availability, permissions and limits. Review planned actions and results, and keep control of purchases, messages and sensitive data.

Sources: December 2024 introduction; May 2025 update; multitasking and access; historical U.S. subscription price; Gemini Agent announcement; current computer-use documentation.