Fazm vs Google Project Mariner
A voice-first AI desktop agent vs a Chrome extension for web automation. Different scopes, different capabilities.
Feature-by-feature comparison
How Fazm and Google Project Mariner stack up across every dimension.
Any macOS app vs Chrome-only web control
Fazm uses macOS accessibility APIs to control any application on your desktop - Terminal, Xcode, Slack, Figma, VS Code, or any other native app. Google Project Mariner is a Chrome extension and is strictly limited to web pages loaded in Chrome. If your workflow involves native apps, Mariner simply cannot help.
- Controls any native macOS application
- Real keyboard and mouse simulation
- Accesses your local file system
- Works with Terminal, IDE, email clients
- Limited to Chrome web pages only
- Cannot access native macOS apps
- No local file system interaction
- Useless outside the browser
Free forever vs $249.99 per month
Fazm is completely free and open source. Google Project Mariner is bundled exclusively with the Google AI Ultra plan at $249.99 per month - nearly $3,000 per year. That pricing tier is primarily for enterprise customers, yet Mariner's capabilities are limited to browser automation. For individuals and small teams, this cost is prohibitive.
- Free with no subscription
- Open source under MIT license
- No usage caps or overage charges
- Self-hostable if desired
- $249.99 per month to access Mariner
- $2,999.88 per year minimum
- Locked to Google AI Ultra plan
- Pricing may change without notice
Voice-first interaction vs text-only commands
Fazm is designed from the ground up for voice interaction. Hold a keyboard shortcut, describe your task in natural language, and Fazm executes it instantly across your entire desktop. Google Project Mariner requires you to type commands into a text interface - there is no voice input available in any tier of Google AI.
- Push-to-talk triggers instant execution
- Natural language voice commands
- Works while other apps are in focus
- Dictate and execute simultaneously
- Text input only
- Must type commands into interface
- No voice recognition
- Interrupts active workflow
On-device processing vs Google's cloud
Fazm runs screen analysis locally on your Mac. Your on-screen content, files, and private data are never sent to external servers for Fazm's core features. Google Project Mariner routes all browser activity through Google DeepMind's servers - every page you visit and every form you fill is processed in the cloud. For privacy-sensitive users and regulated industries, this is a critical difference.
- Screen analysis is fully local
- No data leaves your machine
- Works offline for local tasks
- Suitable for regulated industries
- All browsing data sent to Google
- Cloud-dependent processing
- Activity logged to Google servers
- Privacy policy subject to Google terms
About each product
Google Project Mariner
by Google DeepMind
Google DeepMind's Gemini 2.0-powered Chrome extension that autonomously browses the web, handling tasks like reservations, shopping, and data entry. Features a 'Teach and Repeat' workflow learning system and can run up to 10 parallel task streams simultaneously. Requires the $249.99 per month Google AI Ultra plan - one of the most expensive AI subscriptions on the market.
Fazm
Open source
An AI computer agent for macOS that goes beyond the browser. Controls your mouse, keyboard, browser DOM, and native apps - all triggered by voice. Indexes local files, builds a knowledge graph, and integrates with Google Workspace. Screen analysis runs locally for privacy. The entire project is open source.
When to use which
Choose Fazm if you...
- Need to automate native macOS apps beyond just the browser
- Want voice-driven commands for hands-free control
- Cannot justify a $249.99 per month subscription
- Care about local privacy and on-device processing
- Need file system access and a local knowledge graph
- Prefer open source software you can inspect and modify
Choose Google Project Mariner if you...
- Need to run many web tasks in parallel (up to 10 streams)
- Already subscribe to Google AI Ultra for other features
- Want 'Teach and Repeat' workflow recording for web tasks
- Your entire workflow is Chrome-browser-based
- Prefer Google's Gemini 2.0 model specifically
Ready to try the faster approach?
Download Fazm for macOS and see what a desktop-wide AI agent can do. Free and open source.
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