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Native Desktop Agent vs Cloud VM - Why We Chose to Run on Your Actual Mac

Fazm Team··3 min read
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Native Desktop Agent vs Cloud VM

There are two fundamentally different approaches to AI desktop agents:

  1. Cloud VM agents spin up a virtual machine in the cloud with a browser and basic tools. The AI controls the VM remotely. Claude Cowork and similar products take this approach.
  2. Native agents run on your actual computer and control your actual apps through native APIs.

We chose the native approach for Fazm. Here is why.

The Context Problem

A cloud VM starts empty. It does not have your bookmarks, your saved passwords, your browser extensions, your email account, your CRM login, your Slack workspace. Every automation task starts with "first, log in to..."

Your Mac already has all of this. Your browser has your sessions. Your apps have your data. Your keychain has your passwords. A native agent inherits all of this context for free.

The App Problem

Cloud VMs typically give you a browser. That covers web apps, but your daily workflow probably includes native apps too - Finder, Mail, Calendar, Notes, Terminal, Xcode, Figma desktop, Slack desktop, VS Code. A cloud VM cannot touch any of these.

A native macOS agent can control any app that exposes an accessibility interface - which is every well-built Mac app. This is the same advantage that sets AI desktop agents apart from cloud-based automation platforms like Zapier and Make.

The Latency Problem

Every action in a cloud VM has network latency. Click, wait for the round-trip, see the result, plan the next action. For a 10-step workflow, you are adding 5-10 seconds of pure network overhead.

A native agent executes actions locally. Click to result is milliseconds, not seconds. The entire workflow feels instant.

The Privacy Tradeoff

Cloud VM agents process everything on remote servers. Native agents process everything on your machine. For an agent that needs to see your screen, read your documents, and access your accounts, the privacy implications are significant.

When Cloud VMs Win

Cloud VMs have one clear advantage: isolation. If the agent makes a mistake, it only affects the VM, not your real computer. A native agent operating on your actual system can cause real damage if it clicks the wrong button or sends the wrong email.

This is a real concern, and it is why Fazm uses an approval system for sensitive actions. The agent proposes a plan, you approve it, then it executes. For routine tasks you can set it to auto-approve. For anything involving sending messages or modifying important files, manual approval is the default.


Fazm runs natively on your Mac and controls your actual apps through accessibility APIs. Open source on GitHub. Based on discussions in r/aiagents. For a detailed comparison of leading AI agents, see ChatGPT Atlas vs Perplexity Comet vs Fazm or the best AI agents for desktop automation in 2026. You can also see how Fazm compares to screen observers in our Highlight AI comparison.

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