Google Project Mariner vs Multion: Browser Agents Comparison

Project Mariner is Google DeepMind's experimental AI browser agent that uses Gemini's powerful multimodal capabilities to autonomously navigate websites, understand screen content, plan tasks, and execute them by clicking, typing, scrolling, and filling forms. Powered by Gemini 2.0, Mariner represents a significant advancement in human-agent interaction, starting with browsers as the primary interface. The agent can parse text, images, buttons, forms, and code on web pages, allowing it to navigate complex sites much like a human would.

Key capabilities include the Observe-Plan-Act loop for intelligent task execution, Teach & Repeat functionality where users can demonstrate a workflow once and Mariner will learn to replicate it in future runs, and multimodal understanding that enables the agent to comprehend various types of web content. Thanks to its virtual machine architecture, Mariner can execute up to 10 tasks concurrently, making it useful for comparing prices across sites or gathering data from multiple sources simultaneously. Practical applications include using resume information to find personalized job listings, researching topics to summarize information from across the web, planning travel, and discovering local spots.

As of May 2025, Project Mariner moved from experimental prototype to integrated ecosystem feature, becoming available to Google AI Ultra subscribers in the US. Google DeepMind, the parent organization, was founded in November 2010 and is headquartered in Kings Cross, London. Following a merger with Google AI's Google Brain division in April 2023, Google DeepMind now employs approximately 7,700 people as of February 2026.

MultiOn is an innovative AI company founded in 2022 by Omar Shaya and Div Garg that creates autonomous AI agents capable of completing tasks online with human-like ability and autonomy. Based in Silicon Valley, the company emerged from Stanford's AI and reinforcement learning research, focusing on building agents that can navigate the web, break down complex tasks into micro-tasks, and execute them efficiently. MultiOn is backed by prominent investors including Amazon's Alexa Fund, positioning it at the forefront of the agentic AI revolution.

The company's technology enables AI agents to perform online tasks many times faster than humans, from booking travel to managing workflows across multiple web applications. MultiOn's agents can use web interfaces just like people do, clicking buttons, filling forms, and navigating complex multi-step processes autonomously. This capability makes it a powerful tool for automating repetitive online tasks and enhancing productivity across various use cases.

MultiOn has achieved a nine-figure valuation shortly after its founding, demonstrating strong market confidence in the agentic AI space. The company continues to refine its technology with careful attention to safety and privacy considerations, ensuring that autonomous agents operate within controlled parameters while delivering significant time and efficiency gains for users.