Open Source AI Agents Worth Trying in 2026 - Desktop, Browser, and Code
Open Source AI Agents Worth Trying in 2026
The open source AI agent ecosystem has exploded. Here are the ones worth your time, organized by what they actually do.
Desktop Automation
Fazm - Native macOS agent. Voice-controlled, uses accessibility APIs for reliable UI control. Supports Claude and Ollama. MIT licensed. Best for: automating multi-app workflows on your Mac without writing code.
Browser Automation
browser-use - Python library for AI-controlled browser automation. Uses Playwright under the hood. Good for web scraping and form-filling tasks that do not require native app control.
OpenAI computer-use - Reference implementation of computer use through screenshots. Cloud-based, sends screen captures for processing. Good for understanding the screenshot-based approach.
Code Agents
Claude Code - Anthropic's CLI coding agent. Excellent for writing and modifying code but operates in a terminal, not on your desktop. Pair it with a desktop agent for full workflow coverage.
How to Choose
The decision tree is simple:
- Need to control native Mac apps? Fazm - accessibility APIs work across all apps.
- Need browser-only automation? browser-use - simpler setup for web tasks.
- Need to write code? Claude Code - best coding agent available.
- Need all three? Fazm + Claude Code - they complement each other.
Model Routing
One underappreciated feature: being able to route different tasks to different models. Simple tasks (click this button, fill this field) work fine with local 7B models. Complex tasks (plan a multi-step workflow, draft a nuanced email) benefit from Claude.
Fazm supports both Ollama and Claude, so you can route based on task complexity.
Fazm is open source on GitHub. Discussed in r/AI_Agents.