Fazm vs Perplexity Comet
A voice-first AI agent for your entire desktop vs an AI-powered web browser. Comet makes your browser smarter - Fazm makes your entire computer smarter.
Desktop Agent vs Browser Tool. Worlds apart.
Comet is an AI browser - it can only see and control web pages inside its own window. Fazm is a desktop agent - it sees and controls everything on your Mac, including native apps Comet will never reach.
Fazm
Desktop Agent - controls your entire Mac
VS Code
Refactors code, runs terminal commands, navigates files
Slack + Email
Reads messages, drafts replies, sends across apps
Figma + Browser
Inspects designs, cross-references with docs
Your whole desktop. One agent.
No browser lock-in. No app switching limitations. Fazm sees and controls everything.
Perplexity Comet
AI Browser - web pages only
Web pages
Summarizes, searches, and answers questions about tabs
Comet Agent
Clicks buttons, fills forms, navigates websites
Native apps?
Cannot see VS Code, Slack, Figma, Terminal, or any desktop app
Smart browser. Blind desktop.
Comet makes web browsing better, but your IDE, email client, and design tools are invisible to it.
Comet makes your browser smarter. Fazm makes your entire computer smarter.
If your work lives entirely in a browser, Comet is useful. But most real work spans native apps, files, and tools that no browser can reach - and that's where Fazm lives.
Feature-by-feature comparison
How Fazm and Perplexity Comet stack up across every dimension.
Your entire desktop, not just browser tabs
Comet only sees what's inside its own Chromium browser window. Fazm operates across every app on your Mac - switch between VS Code, Figma, Slack, Terminal, and Finder without leaving your workflow.
- Controls any macOS app
- Switches between applications
- Manages files and folders
- Types and clicks anywhere on desktop
- Limited to web pages in Comet
- Cannot access native apps
- No file system access
- Only automates websites
Speak naturally. Fazm acts instantly.
Fazm is built around voice - push-to-talk with one keyboard shortcut. Comet has limited voice capabilities; its primary interface is the Comet Assistant sidebar where you type queries.
- Push-to-talk voice input
- Natural language commands
- One keyboard shortcut to activate
- Voice drives full desktop control
- Text-first sidebar chat
- Limited voice mode
- Voice cannot trigger agent actions
- Primarily keyboard-driven
Sees your whole screen. Knows your history.
Fazm understands what's on your screen across all apps and builds persistent context over time. Comet's context is limited to whatever tabs are currently open in its browser - close a tab and the context is gone.
- Full screen awareness across apps
- Continuous context memory
- Local file indexing
- Cross-app understanding
- Current browser tabs only
- No persistent memory
- No file access
- No cross-app awareness
Your data stays on your machine.
Fazm processes screen data locally before sending only the intent to AI models, and the entire codebase is open source. Comet sends your browsing data, queries, and page content to Perplexity's servers for processing.
- Local screen processing
- Only intent sent to AI
- Open source & auditable
- No data collection
- Browsing data sent to Perplexity
- Proprietary processing pipeline
- Closed source
- Perplexity data policies apply
About each product
Perplexity Comet
by Perplexity
A Chromium-based AI browser launched in July 2025. Features two AI modes: “Comet Assistant” (a sidecar panel for Q&A and summaries of open tabs) and “Comet Agent” (takes over the browser cursor for multi-step web tasks like booking flights, shopping, and filling forms). Includes built-in Perplexity search. Free with limited searches; Pro at $20/month and Max at $200/month for unlimited usage. Available on macOS, Windows, Android, and iOS.
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...
- Work across multiple desktop apps, not just a browser
- Want voice-first control over your entire computer
- Need your AI to understand local files and native apps
- Don't want to abandon your current browser
- Prefer open source software you can inspect and audit
- Want screen analysis that runs locally for privacy
Choose Comet if you...
- Primarily work inside a web browser all day
- Want AI to automate web tasks like booking and shopping
- Need built-in search with AI-powered answers
- Want cross-platform support (Windows, Android, iOS)
- Don't mind switching to a new browser
Ready to go beyond the browser?
Download Fazm for macOS and see what a desktop-wide AI agent can do. No browser switch required. Free and open source.